Dynamics of Content Knowledge: Learned from Indonesian Arabic Teachers

,


Introduction
Teachers play a crucial role in achieving educational goals by formulating learning goals, choosing appropriate materials, employing effective teaching methods, and evaluating learning outcomes [1][2][3][4].Moreover, research and scholarly consensus indicate that the quality of teachers directly impacts students' academic success [5][6][7].To ensure teacher quality, educators must possess extensive and deep knowledge of the subjects they teach, including eloquent communication skills in the language of instruction, understanding of basic concepts and subject structure, and awareness of how subject knowledge is constructed, organized, and interconnected.Thus, giving more input to teaching leads to better performances of students and higher awareness to participate in learning activities [8].
One significant factor that influences teacher quality is their professional knowledge, specifically their contentrelated knowledge.This refers to the teacher's understanding of facts, concepts, principles, methodologies, and generalizations related to the subject matter, which shapes their pedagogical thinking and decision-making.Studies conducted in Angola by Gunasekaran et al. [9] and in Nigeria by Ayeni [10] have shown that professional knowledge, including mastery of content-specific skills, significantly impacts the way teachers teach in the classroom.This supports the assertion by Widodo [11] that content knowledge is a crucial factor for teachers.Mazlan et al. [12] in their study discovered that there is a positive and strong relationship between teachers' content knowledge of Arabic language and teaching effectiveness.Furthermore, Zakaria et al. [13] found that teachers with stronger content knowledge are more likely to use effective practices that help students construct and internalize knowledge, corroborating previous research that highlights the positive association between teacher content knowledge and student learning.
Currently, there is a pressing issue with the Arabic language competence of teachers, as their mastery of the language is often limited, resulting in suboptimal Arabic language teaching [14].Kamarul Shukri and Mohd Hazli [15] stated that the requirements for precise language competence for Arabic language teachers have not been accurately identified, and there is a lack of instruments to measure teachers' competence in Arabic language teaching.Studies have also indicated that a limited and shallow understanding of the Arabic language is a contributing factor to the limited content knowledge among Arabic language teachers, as highlighted by Sirait [7] in discussing challenges in Arabic language teaching.Therefore, recognizing the competence of teachers in the Arabic language is essential for mapping purposes and providing the necessary teaching materials to improve the quality of Arabic language education.
In efforts to enhance teacher professional and content knowledge, many teachers participate in teacher professional development programs, such as the Teacher Professional Education Program (TPEP).For Arabic language teachers, this program provides learning materials in the form of Arabic modules that cover content knowledge.However, a current challenge is the limited availability of valid and reliable measurement scales for assessing Arabic content knowledge among teachers.
In language learning, particularly Arabic, the teacher must have adequate content knowledge, which includes mastery of several language aspects such as Nahwu (syntax), Shorof (morphology), Balaghah (semantics), and Mu'jamiyah (lexical).Previous studies have examined the difficulty levels of these language competencies.The easier competences that were mentioned were Nahwu and Shorof because Shorof only learns the formation, and words change according to the desired meaning, the origin of the word, and the change in word class.Meanwhile, Nahwu only study the relationship between words in sentences and grammar expression.A study by Mariyam [16] revealed that the content knowledge in Nahwu contributed 76.1% to the ability to read Arabic books.Apparently, Shorof is also considered a problem for Arabic students, specifically for beginners who want to learn Arabic speech, writing, or translating the L1 into Arabic [17].Then Mu'jamiyah (lexical) knowledge also significantly influenced Arabic skills since it studied about vocabularies [18].From these studies, Balaghah was identified as the most challenging aspect in Arabic, followed by Nahwu and Shorof [19].Balaghah, which encompasses Arabic semantics and rhetoric, involves the understanding of the meanings of words, their usages, and the ability to express ideas eloquently and persuasively.Mastery of Balaghah is crucial for teachers to effectively teach Arabic language learners how to use language in various contexts, such as reading, writing, speaking, and listening.
Assessing the content knowledge of Arabic language teachers, particularly in Balaghah, is vital for identifying their strengths and weaknesses and providing targeted professional development opportunities.However, there is currently a lack of valid and reliable measurement scales specifically designed for assessing Balaghah content knowledge among Arabic language teachers.Existing measurement scales tend to focus on general language proficiency or do not comprehensively cover the specific aspects of Balaghah, making them inadequate for accurately assessing teachers' content knowledge in this area.
To address this gap, there is a need to develop and validate a measurement scale that specifically assesses Balaghah content knowledge among Arabic language teachers.This measurement scale should be based on robust theoretical frameworks and undergo rigorous validation processes to ensure its validity and reliability.It should also take into consideration the contextual factors of the Arabic language teaching environment, such as the level of proficiency of Arabic language learners, the curriculum, and the instructional practices commonly used in Arabic language classrooms.
Thus, this study aimed to find out the dynamics of content knowledge of Arabic teachers seen from the test instruments and the result of TPEP examination in UIN Malang.It also seeks to measure the validity and reliability of the test instruments in TPEP.Once a valid and reliable measurement scale for Balaghah content knowledge among Arabic language teachers is available, it can be utilized to assess teachers' strengths and weaknesses in this area, provide targeted professional development opportunities, and ultimately enhance the quality of Arabic language education.Additionally, the findings from the assessment can inform curriculum development, instructional practices, and policy decisions related to Arabic language education.
In conclusion, teacher content knowledge, particularly in the area of Balaghah, is a critical factor that impacts the quality of Arabic language education.However, there is a current gap in valid and reliable measurement scales for assessing Balaghah content knowledge among Arabic language teachers.Developing and validating a measurement scale specifically for this purpose is essential for accurately assessing teachers' content knowledge, providing targeted professional development opportunities, and ultimately improving the quality of Arabic language education.

Research Method
The objective of this study is to conduct an exploratory analysis on the dynamics of content knowledge among Arabic language teachers who are enrolled in the TPEP at UIN Malang.The study focuses on Arabic language teachers who participated in the TPEP and joined the professionalism exam.This study aimed to enhance the understanding of the content knowledge of Arabic language teachers who participated in TPEP, with a particular emphasis on their content knowledge dynamics.
Convenience sampling technique was used to select participants who met the research criteria, including geographical proximity to the research location, availability of time,

2
Education Research International commitment to participate, and ease of access [20].The sample comprised of 446 Arabic language teachers, which was considered sufficient as it exceeded the minimum sample size of 384.
It was calculated based on the proportionate sampling formula from the population (N) of 6675.
Participants voluntarily agreed to participate without coercion.Prior to the research, participants were provided with complete information about the research objectives, procedures, risks, benefits, and their rights as participants and were requested to provide written informed consent.Participant confidentiality was maintained through the use of codes or unidentifiable identification, and only authorized research team members had access to the data.Participant identities remained anonymous, and no personal information was disclosed in the research findings.Participant data privacy was ensured through secure storage and data deletion after the research was completed.Bias control measures were implemented to minimize potential biases in data collection and analysis.
The data obtained from the participants consisted of the results of the professionalism exam, which comprised of two test packages, namely Test Package 1 and Test Package 2. The sample of 446 Arabic language teachers was divided into two groups, with 221 teachers answering Test Package 1 and 225 teachers answering Test Package 2. Table 1 presents the demographic profile of the respondents based on gender, years of teaching experience, and teaching institution, as reported in Test Package 1 and Test Package 2. The table provides information on the number of male and female respondents, teaching experience categorized into three categories, and the distribution of respondents based on their teaching institutions.
Test Package 1 and Test Package 2 are different instruments, but they were derived from the same indicators and dimensions.Test Package 1 originally comprised of 110 items but underwent data reduction analysis resulting in the retention of only 49 items.Similarly, Test Package 2 initially contained 105 items, but after data reduction analysis, only 61 items were retained.The reduction of test items was meticulously conducted with a rational objective of selecting items that would optimally contribute to the test reliability in each package.This reduction was undertaken to enhance the quality of the tests and ensure that the tests utilized in this research possess high reliability, thus improving the validity of the research results and minimizing any confusion or misconceptions among readers regarding the number of test items employed.
The instruments were analyzed using exploratory factor analysis (EFA), a component of structural equation modeling, to validate the measurement model of the latent constructs used in this study.EFA was employed to identify the factors that predominantly influence the Arabic language competency of teachers.Furthermore, through EFA, the underlying factors of the data structure, specifically the four linguistic aspects of N = syntax (Nahwu), S = morphology (Shorof ), B = Balaghah, M = lexical (Mu'jamiyah), were confirmed for the appropriateness of the instruments in measuring the Arabic language proficiency of teachers.EFA entails the process of reducing variables into main factors that are interrelated based on variable correlations, which represent the underlying constructs of the data.The data were subsequently analyzed to assess the test quality, including reliability, validity, and item characteristics.Additionally, this analysis facilitated the determination of teachers' pedagogical abilities in teaching based on the aforementioned factors in preparing competent Arabic teachers.

Results
3.1.EFA for Package 1. EFA is a statistical technique employed in psychometrics to identify and group correlated variables into smaller, interpretable factors.This method aids researchers in simplifying complex data into organized dimensions, facilitating data interpretation.In this study, EFA was utilized to analyze data collected from tests or questionnaires in order to uncover underlying patterns or structures.The EFA conducted in this study involved several stages, including the following.
3.1.1.Sample Adequacy Test.This stage assesses the adequacy of the sample by examining the Kaiser-Meyer-Olkin (KMO) measure, with a minimum threshold of 0.5 [21].Additionally, Bartlett's test of sphericity is conducted to confirm that the Education Research International correlation matrix of the items is not an identity matrix, with a significant χ 2 p-value (p-value < 0.05) [22].The results of the analysis in Table 2 reveal that KMO = 0.809, indicating that the sample meets the minimum threshold.Bartlett's test yielded χ 2 (67) = 7,027.6,p ¼ 0:001, suggesting that the sample used in the analysis is sufficiently adequate and the data are suitable for factor analysis, as it is not random or structured.The subsequent step involves testing the adequacy of the sample by examining the anti-image diagonal correlation or measures of sampling adequacy (MSA) in order to evaluate the strength of the correlation between one component and other components in the correlation matrix.The minimum correlation criterion is set at 0.5, as recommended by Neill [23], indicating that the data used in the factor analysis are not random or unstructured and thus suitable for factor analysis.Based on the feasibility test conducted to assess the data suitability and sample adequacy, the data in this study meet the criteria for adequacy for factor analysis, as evidenced by the results of KMO, Bartlett's test, and MSA correlation that meet the criteria.
3.1.2.Component Feasibility Test.Feasibility test for components is conducted to ensure that the data do not deviate in the factor analysis by evaluating the communality of each component.The acceptable range for communality generally falls within 0.4-0.7,categorized as low to moderate [22].It reveals that the communality of the components ranges from 0.7 to 0.9, indicating that these variables are strongly related to each other and significantly contribute to the extracted factors.Communality is an estimate of the amount of variance in each variable that can be explained by the extracted factors in the factor analysis.
A communality range between 0.7 and 0.9 can be considered an indicator of good convergent validity, implying that the variables used in the factor analysis have a high degree of similarity in measuring the same construct.Thus, the results of the factor analysis can be relied upon in identifying the underlying factors of the analyzed construct.3 shows that out of 49 factors, four factors have eigenvalues >1, indicating that these factors are able to explain a significant amount of variance in the data.Therefore, it can be concluded that the four extracted factors are significant in explaining the linguistic aspects being analyzed.The total variance explained by these four factors is 83.81%, indicating that the extracted factors account for a large portion of the variation in the data.However, there is still ∼16.19% of unexplained variation by these factors, which may be attributed to other factors not included in the analysis or natural variability in the data.The consensus on the cumulative percentage of variance in factor analysis varies depending on the field of research conducted [22].For instance, in the field of science, the minimum cumulative variance is usually set at 95%, while in the social sciences, the cumulative variance is generally around 50%-60% [19].
The preliminary analysis of the proficiency of Arabic language teachers revealed the presence of four factors.However, the initial results of the factor analysis showed interrelated factors that were challenging to interpret clearly.Hence, varimax rotation was employed to enhance the interpretation of these factors.The varimax rotation involved rotating the factor loadings identified, resulting in simplified factors with high loadings on one or two variables.This aided in reducing the complexity of the factors and facilitated a more comprehensible interpretation of the results in the context of prior research.The rotated results of the four components, along with instrument communality and reliability, are concurrently presented in Table 4.
The factor analysis results revealed the presence of four factors identified after rotation using the varimax method, as shown in Table 4 provided.The table includes information on communalities, Cronbach's α with item deleted, and the contribution of each item to the identified factors.Communalities, which indicate the extent to which the variation of an item can be explained by the identified factors, ranged from 0 to 1, with higher communalities indicating a greater contribution of the item to the identified factors.In Table 4, it is observed that several items have high communalities above 0.8, such as N1, N2, N4, N5, N7, N22, N23, N27, N29, N30, N31, N32, S2, S5, S6, S7, S8, S9, S10, B12, B17, B20, B24, B28, B30, B31, and B37, indicating their significant contribution to the identified factors.
Internal reliability, measured by Cronbach's α, is a reflection of the internal reliability of a factor or construct, with values ranging from 0 to 1. Higher values indicate higher internal reliability of the factor.The contribution of each item to the identified factors is also presented in Table 4, as seen from the communalities values.Items with higher communalities have a greater contribution to the identified factors, and items with high communalities (above 0.8) significantly contribute to the identified factors.
Furthermore, the EFA conducted on the Arabic language proficiency of teachers, which includes four linguistic aspects (Nahwu, Shorof, Balaghah, and Mu'jamiyah), using the component matrix output from SPSS, concludes that:   4, the following explanations can be provided.Construct validity can be ascertained from the communality of each item in the instrument, which consistently exceeds an average of 0.80.This indicates that the items in the instrument possess good construct validity, as they exhibit high communality, and most of the variance in these items can be accounted for by the common factor or construct being measured.
Convergent validity can be inferred from the corrected item-total correlation, which denotes the correlation between the item score and the total score of the instrument after excluding the score of that particular item.The table reveals that the corrected item-total correlation for each item in the instrument is relatively high, averaging above 0.30.This suggests that the items in the instrument exhibit good convergent validity, as they display a sufficiently high correlation with the total score of the instrument and are capable of measuring the same construct as other validated measurement instruments.
Discriminant validity can be observed from the intercorrelation among item scores in the instrument.The table indicates that the intercorrelation among item scores in the instrument is relatively low, averaging below 0.80.This implies that the instrument possesses good discriminant validity, as the items in the instrument are not highly correlated with each other and can differentiate between different constructs.
Reliability: reliability refers to the extent to which a measurement instrument can produce consistent and stable results in repeated measurements.The reliability of the instrument can be assessed using Cronbach's α if item deleted, which is the reliability coefficient of the instrument after excluding one item.According to Table 4, Cronbach's α values for the identified factors are sufficiently high, ranging from 0.979 to 0.981, indicating good reliability for these factors.This signifies that the instrument exhibits very good reliability, as it demonstrates very high-reliability coefficients and is capable of producing consistent and stable results in repeated measurements.

The Characteristics of Item
Questions with Rasch Model 3.2.1.Difficulty Index.Based on the Rasch model, the characteristics of item questions can provide valuable insights into the difficulty level of questions.These insights can help teachers in administering tests on Arabic language content knowledge.The Rasch model can be used to determine the distribution of item difficulty (δ) and teacher ability (θ).The difficulty index serves as an indicator of the likelihood of teachers successfully answering a question based on their ability.If the teacher's ability (θ) is greater than the item difficulty (δ), it can be inferred that the teacher has a higher chance of correctly answering the question, and vice versa.According to Sainuddin [24], the acceptable range for question difficulty falls within −2 ≤ δ ≤ 2 logits.Difficulty categories on the logit scale include difficult for δ > 0.5, moderate for −0.5 ≤ δ ≤ 0.5, and easy for δ > −0.5.The table above presents the difficulty level categories for Arabic language content knowledge questions in Package 1.
Table 5 illustrates that 70% of the questions in Package 1 are categorized as having moderate difficulty, while the remaining 30% are classified as difficult.There are no questions categorized as easy in Package 1. From a psychometric perspective, all the items analyzed exhibit measurement outcomes that closely align with the expected values in the Rasch model, as evident from the infit mean-square values presented in Figure 1.
Question M21 (δ = 1.493) has the highest difficulty level in Package 1, while questions B5, B4, and B20 (δ = −0.206)are the easiest.In general, the Mu'jamiyah category has the highest number of questions with high difficulty levels, totaling six questions, while Balaghah has two questions categorized as having moderate difficulty (easier compared to other indicators).An interesting finding is that there are no questions categorized as easy in this package, whereas typically, Education Research International  Education Research International for proficiency tests, there should be around 10%-15% of questions categorized as easy.This may be due to the reduction of items during the initial analysis, as easy questions did not significantly contribute to measuring the Arabic language content knowledge of teachers.
3.2.2.Arabic Language Teachers' Proficiency.Table 6 presents information on the proficiency of Arabic language teachers in answering questions in Package 1, categorized into three levels: low, moderate, and high, based on the measured θ (theta) values in the logit scale.
Table 6 presents the findings of the psychometric analysis of Arabic language teachers' abilities in answering Package 1 questions, as measured using a logit scale.The results indicate three categories of abilities: low, moderate, and high.A total of 8.16% of teachers were categorized as low, with θ values <−1, while the majority of teachers, 81.63%, fell into the moderate category, with θ values ranging from −1 to 1. Additionally, 10.2% of teachers were categorized as high, with θ values >1.These findings offer valuable insights into the distribution of Arabic language teachers' abilities based on the logit scale, with the majority falling in the moderate category.This information can serve as a reference for the development of targeted training or teaching programs to enhance Arabic language teachers' abilities.The figure shows that the questions used in Package 1 provide optimal information in the ability range of −3.85 to 3.92 logit (intersection of TIF and SEM).This suggests that teachers' abilities in answering Package 1 questions fall within the range of approximately −2.2 to 1.5 logit.These measurement results offer valuable information regarding Arabic language content knowledge of teachers.

Total Information Function (TIF) and Standard Error of Measurement (SEM)
3.3.EFA for Package 2. Similar to the factor analysis conducted in the previous section, the analysis for Package 2 also went through several stages, including the following.

Sample Adequacy Test. The results of EFA output in
Table 7 indicate that the data used have an adequate sample size, as evidenced by the KMO MSA value of 0.883, which is above the minimum threshold of 0.5 [17].Additionally, Bartlett's test of sphericity shows that the correlations between variables in the data are statistically significant, with a χ 2 (1,830) = 54,253.143,p ¼ 0:000.This indicates that the data used in the factor analysis are sufficiently representative, and the correlations between variables in the data are strong enough to conduct factor analysis.The next step is to test the adequacy of the sample by examining the anti-image diagonal correlations or MSA.This test is conducted to evaluate the strength of the correlation between one component and other components in the correlation matrix.The minimum correlation criterion is 0.5 [23], indicating that the data used in the factor analysis are not random or unstructured, making it suitable for factor analysis.Based on the feasibility test conducted to examine the data suitability and sample adequacy, the data in this study meet the criteria for sample adequacy for factor analysis.This is indicated by the results of the KMO, Bartlett's test, and MSA correlation, which meet the criteria.

Component Feasibility Test.
The feasibility test is conducted to ensure that the data are not deviant in the factor analysis by evaluating the communality of each component.The minimum acceptable communality interval generally ranges from 0.4 to 0.7, which is categorized as low to moderate [22].Table 4 shows that the communality of the components has a range of values between 0.7 and 0.9, which can be interpreted as indicating a strong correlation and significant contribution of these variables to the extracted factors.Communality is an estimation of the amount of variance in each variable that can be explained by the extracted factors in the factor analysis.A communality range between 0.7 and 0.9 can be considered as an indicator that the variables used in the factor analysis have good convergent validity, meaning that these variables have a high level of similarity in measuring the same construct.Thus, the results of the factor analysis can be relied upon in identifying the underlying factors of the analyzed construct.8 shows that out of the 61 factors, four factors have eigenvalues >1.Eigenvalues >1 indicate that these factors are able to explain a significant amount of variance in the data.Therefore, it can be concluded that the four extracted factors can be considered significant factors in explaining the linguistic aspects being analyzed.The total variance explained by these four factors is 72.51%.This indicates that the extracted factors are able to explain a large portion of the variation in the data.However, there is still ∼27.93% of unexplained variance by these factors, which may be caused by other factors not included in the analysis or natural variability in the data.There is no consensus on the cumulative percentage of variance in factor analysis, as it depends on the field of research being conducted [22].For example, in the field of sciences, the minimum cumulative variance is typically set at 95%, while in the social sciences, it is generally around 50%-60% [19].
The results obtained from the initial analysis of Arabic language proficiency of teachers revealed four factors.However, the initial results of the factor analysis showed that these factors were interrelated and difficult to interpret clearly.Therefore, varimax rotation was used to improve the interpretation of these factors.Varimax rotation was performed by rotating the factor loadings found, resulting in simpler factors with high factor loadings on one or two variables.This helped reduce the complexity of the factors and made the interpretation of the factor analysis results more easily understood in the context of previous research.The rotated results of the four components, along with instrument communality and reliability, are presented collectively in Table 9.
The results of factor analysis indicate that four factors were identified after rotation using the varimax method.The provided table contains information regarding communality, Cronbach's α if items were removed, and the contribution of each item to the identified factors.Based on Table 9, items with high communality (below 0.5) are items N11, N13, N12, S4, S7, S8, S9, S10, B53, B54, B55, B56, B37, B46, B48, B51, B52, B53, B54, and B55.Communalities below 0.5 indicate that these variables have a relatively low contribution to the common factors or other latent factors in the data table; thus, their communality is considered poor.However, these items still have theoretical or conceptual relevance to the common factors being analyzed.Despite their low communality, the concepts or variables represented by these items are still relevant and important in the conceptual framework or theory used in the research or analysis.
Internal reliability (Cronbach's α): Cronbach's α is a measure of the internal reliability of a factor or construct.Cronbach's α values range from 0 to 1, and higher Cronbach's α values indicate higher internal reliability of the factor.Contribution of each item to the identified factors: the table also presents the contribution of each item to the identified factors, which can be seen from the communality values.The higher the communality value of an item, the greater its contribution to the identified factors.Therefore, items with high communality values (above 0.8) have a significant contribution to the identified factors.
Furthermore, the results of the EFA conducted on the Arabic language proficiency of teachers, which includes four linguistic aspects (Nahwu, Shorof, Balaghah, and Mu'jajamiyah) using the component matrix output from SPSS, concluded that some items with high factor loadings on specific components could be identified as the strongest indicators representing certain components or aspects of teachers' Arabic language proficiency, as follows: (1) The first factor has the highest loading for items N11, N12, and N13, representing the syntactic (Nahwu) aspect of Arabic language, indicating that these items represent the syntactic (Nahwu) aspect of teachers' Arabic language proficiency.(2) The second factor has the highest loading for items S4, S7, S8, S9, and S10, representing the morphological (Shorof ) aspect of Arabic language.(3) The third factor has the highest loading for items B2, B3, B4, B6, B8, B9, B10, B11, B12, B13, B15, B17, B19, B21, B22, B23, B25, B26, B27, B28, B30, B32, B33, B34, B35, B36, B37, B38, B40, B43, B45, B46, B47, B48, B49, B50, B51, B52, B53, B54, B55, and B56, representing the Balaghah aspect of Arabic language.This indicates that these items represent the morphological Balaghah (rhetoric) aspect of teachers' Arabic language proficiency.(4) The fourth factor has the highest loading for items M4, M9, M11, M12, M14, M16, and M19, representing the lexical (Mu'jamiyah) aspect of Arabic language, indicating that this component represents the lexical (Mu'jamiyah) aspect of teachers' Arabic language.9, the following can be explained.Construct validity indicates that the communality for each instrument item is very high, with an average above 0.70.This indicates that the items in the instrument have good construct validity, as they have high communality, and most of the variation in these items can be explained by the common factor or construct being measured.Convergent validity can be seen from the corrected item-total correlation, which is the correlation between the item scores and the total instrument scores after removing the item scores.Based on the table, it can be seen that the corrected item-total correlation for each instrument item is sufficiently high, with an average above 0.30.This indicates that the items in the instrument have good convergent validity, as they have a sufficiently high correlation with the total instrument score and can measure the same construct as other tested and validated measurement instruments.Discriminant validity can be seen from the intercorrelation between item scores in the instrument.Based on the table, it can be seen that the intercorrelation between item scores in the instrument is relatively low, with an average below 0.80.This indicates that the instrument has good discriminant validity, as the items in the instrument are not highly correlated with each other and can distinguish between different constructs.Reliability: reliability refers to the extent to which a measurement instrument can produce consistent and stable results in repeated measurements.The reliability of an instrument can be seen from Cronbach's α if item deleted, which is the reliability coefficient of the instrument after removing one item.Based on Table 9, it can be seen that Cronbach's α values for the identified factors are quite high, ranging from 0.923 to 0.929, indicating good reliability for these factors.This indicates that the instrument has very good reliability, as it has very high-reliability coefficients and is capable of producing consistent and stable results in repeated measurements.
3.4.The Characteristics of Item Questions with Rasch Model 3.4.1.Difficulty Index.The characteristics of Rasch model items indicate the level of difficulty of questions.These characteristics show how difficult or easy the questions are for teachers to answer when implementing a test on Arabic language content knowledge.Studies using the Rasch model can be chosen to determine the distribution of item difficulties (δ) and teacher's abilities (θ).The difficulty index indicates the likelihood of a teacher successfully answering a question with their current ability.If the teacher's ability θ > δ, it can be said that the teacher has the opportunity to answer the question correctly, and vice versa.According to Sainuddin [24], the acceptable range of item difficulties is within the interval of −2 ≤ δ ≤ 2 logit scale.Difficulty categories on the logit scale are as follows: δ > 0.5 indicates difficult, −0.5 ≤ δ ≤ 0.5 indicates moderate, and δ > −0.5 indicates easy.Table 10 below informs that generally, 70% of the questions in Package 2 fall into the moderate difficulty level category, with only 30% of questions categorized as easy difficulty.In contrast to the previous Package 1, which did not have any easy difficulty questions, Package 2, on the other hand, does not have any high-difficulty questions.The table below presents the distribution of difficulty categories for Arabic language content knowledge questions in Package 2.
Table 10 shows that there are no difficult questions in Package 2. This is likely due to question reduction, where high-difficulty questions were eliminated because they fell below the criteria.Statistically, all analyzed items had measurement outcomes that closely approached the expected values in the Rasch model.This is indicated by the infit mean square of all items falling within the acceptance range of 0.5-1.5, as presented in Figure 3.
The most difficult question in Package 2 is question B53 (δ = 0.252), while the easiest is question B22 (δ = −0.916).Based on the results of logit scale analysis of Arabic language teachers' abilities in answering Package 2 questions, it was found that 14 teachers (6.12%) were categorized as having low abilities, 193 teachers (85.71%) had moderate abilities, and 18 teachers (8.16%) had high abilities.Low ability in answering Package 2 questions may need to be improved through training or more effective learning approaches.Meanwhile, moderate ability is considered satisfactory, but there is still room for improvement in certain aspects.High ability, on the other hand, is considered excellent and can serve as a role model for other teachers in mastering Arabic language content.These findings are important to be further analyzed and reinforced with relevant statistical analysis methods to comprehensively understand the abilities of Arabic language teachers in answering Package 2 questions in the context of the research conducted.
3.4.3.TIF and SEM. Figure 4 shows that the TIF and SEM provide information that the questions used in Package 2 can provide optimal information in the ability range of −4.13 to 4.13 logits (intersection of TIF and SEM).This result indicates that teachers' ability to answer Package 2 questions on a scale of −1.9 to 1.8 is within the range where Package 2 provides optimal information.Thus, the information obtained from the measurement results using Package 2 provides optimal information about the Arabic language content knowledge of teachers.

Discussion
The results of the EFA revealed that four factors represent different aspects of Arabic language proficiency among teachers, as measured in this study.These factors are Arabic language teachers' knowledge of grammar (Nahwu), word forms (Shorof ), rhetoric (Balaghah), and vocabulary (Mu'jajamiyah), which are important components in assessing their knowledge [25,26].The factor analysis results indicated that their knowledge of word structure, grammar rules, root words, rhetorical figures, and appropriate word usage in context all play significant roles as main components of Arabic language teachers' knowledge content.
The EFA results also showed that the items developed in this study have strong relationships with the predetermined dimensions, and the number of factors formed aligns with the number of identified components.This indicates the validity and reliability of the instrument developed for measuring Arabic language teachers' knowledge content.These findings also reinforce the quality of the instrument in terms of construct validity, discriminant validity, convergent validity, and test reliability.Thus, the obtained measurement results can be considered accurate and dependable in assessing Arabic language teachers' proficiency in the studied knowledge content.
The research findings revealed interesting results regarding Package 1 and Package 2 tests in measuring Arabic language teachers' knowledge content.In the Package 1 test, the highest number of questions with a high difficulty level was found in the Mu'jamiyah component, while in the Package 2 test, the Balaghah component had the highest number of questions.These findings depict the characteristics of Package 1 and Package 2 tests in relation to Mu'jamiyah and Balaghah components in the context of this research and can serve as a basis for developing more accurate assessment instruments in future studies [27,28].
The results of the Rasch model analysis revealed three categories of Arabic language teachers' abilities: low, moderate, and high.The majority of teachers fell into the moderate category, and this finding can serve as an important reference for the development of training or instructional programs.The analysis also indicated the need for improvement in Education Research International teachers' abilities to answer questions in Package 1 and Package 2. These findings need to be further analyzed using relevant methods to comprehensively understand the Arabic language teachers' abilities in content knowledge within the TPEP at UIN Malang.
There are several theories that may be related to the findings of this study.For example, some Arabic linguistic theories may consider aspects of Balaghah or rhetoric as less relevant in everyday Arabic language proficiency and instead prioritize lexical aspects (Mu'jamiyah) as more important in daily communication [29,30].Additionally, there may be linguistic theories that propose that syntactic aspects (Nahwu) are not as significant in Arabic language proficiency and that understanding context and the use of phrases or expressions in everyday communication are far more important [31].Furthermore, the results of the Rasch model analysis, which revealed three categories of Arabic language teachers' abilities (low, moderate, and high), can also serve as a basis for the development of training or instructional programs tailored to the needs of teachers in improving their knowledge in Arabic language content.Training or instructional programs that can enhance teachers' abilities to answer questions in Packages 1 and 2 can also be developed to improve their abilities in the components of Mu'jamiyah and Balaghah.
Moreover, the findings of this study can also be linked to the theory of professional development, which emphasizes the importance of continuous learning and improvement among teachers [32,33].Teachers who engage in ongoing professional development activities, such as workshops, seminars, and training programs, are more likely to enhance their knowledge and skills in their subject matter, which can positively impact their proficiency in teaching Arabic language [34,35].Therefore, the results of this study can provide insights for the development of effective professional development programs for Arabic language teachers to improve their knowledge and abilities in different components of Arabic language proficiency.Furthermore, the findings of this study have implications for curriculum development in Arabic language teacher education programs.The emphasis on different components of Arabic language proficiency, such as Nahwu, Shorof, Balaghah, and Mu'jamiyah, in this study, can inform the design of curriculum content and instructional strategies to better prepare Arabic language teachers for their teaching roles [36,37].For example, the curriculum can include specific modules or courses that focus on enhancing teachers' knowledge of word structure, grammar rules, root words, rhetorical figures, and appropriate word usage in context, which are identified as important components of Arabic language teachers' knowledge content in this study.Moreover, the curriculum can also incorporate opportunities for teachers to practice and apply their knowledge in real-world teaching contexts, such as through classroom observations, teaching practicum, and reflective activities, to further enhance their language proficiency and pedagogical skills.
In addition, the findings of this study can contribute to the improvement of Arabic language teacher assessment practices.The identification of different components of Arabic language proficiency and their relationship with test difficulty levels in this study can inform the development of more accurate and reliable assessment instruments for evaluating Arabic language teachers' knowledge and abilities [38,39].For instance, future assessment instruments can be designed to include a balanced representation of different components of Arabic language proficiency, such as Nahwu, Shorof, Balaghah, and Mu'jamiyah, to provide a comprehensive measure of teachers' language proficiency.Moreover, the findings of this study can also guide the development of assessment items that align with the identified components of Arabic language teachers' knowledge content to ensure that the assessment accurately reflects the specific knowledge and skills required for effective Arabic language teaching.
It is worth noting that this study has some limitations that should be acknowledged.First, the sample of Arabic language teachers in this study was limited to a specific TPEP at UIN Malang, which may not fully represent the diverse population of Arabic language teachers in different contexts.Therefore, caution should be exercised when generalizing the findings to other contexts.Future research could consider including a more diverse sample of Arabic language teachers from different regions, institutions, and levels of education to obtain a more comprehensive understanding of their knowledge and abilities.Second, the measurement instrument used in this study was developed based on the researchers' conceptualization of Arabic language proficiency and the identified components, which may not fully capture all aspects of Arabic language proficiency.Future research could consider using multiple measurement instruments or triangulation of data sources to strengthen the validity and reliability of the findings.Lastly, this study  14 Education Research International focused on Arabic language teachers' knowledge and abilities but did not investigate other factors that may influence their proficiency, such as motivation, attitudes, and classroom practices.Future research could explore the interplay of these factors and their impact on Arabic language teachers' proficiency, such as their motivation to teach Arabic, attitudes toward the language, and classroom practices.Understanding the complex interplay between these factors and teachers' proficiency can provide a more holistic understanding of Arabic language teaching and can inform the development of targeted interventions to improve Arabic language teachers' proficiency.
In conclusion, this study contributes to the understanding of Arabic language teachers' knowledge and abilities in different components of Arabic language proficiency.The findings have implications for professional development, curriculum development, and assessment practices in Arabic language teacher education programs.However, it is important to acknowledge the limitations of this study, such as the limited sample size and measurement instrument used.Future research should consider addressing these limitations and further exploring other factors that may influence Arabic language teachers' proficiency.By addressing these gaps in the literature, we can continue to advance our understanding of Arabic language teaching and ultimately enhance the quality of Arabic language education.

Conclusion
In conclusion, this study investigated the components of Arabic language teachers' knowledge content, specifically Nahwu, Shorof, Balaghah, and Mu'jamiyah, and their relationship with test difficulty levels.The findings of this study contribute to the existing literature on Arabic language teaching by shedding light on the importance of these knowledge components for Arabic language teachers' proficiency.The results have implications for professional development programs, curriculum development, and assessment practices in Arabic language teacher education.
The study suggests that Arabic language teachers need to have a strong foundation in Nahwu, Shorof, Balaghah, and Mu'jamiyah in order to effectively teach Arabic language to learners.These components are essential for teachers to understand the complex nature of Arabic language teaching and to provide quality education to their students.The findings also highlight the need for ongoing professional development programs to enhance Arabic language teachers' knowledge and abilities in these areas.
Furthermore, the study indicates that test difficulty levels are influenced by the proficiency of Arabic language teachers in Nahwu, Shorof, Balaghah, and Mu'jamiyah.This implies that teachers with a higher level of proficiency in these components are likely to develop more challenging and appropriate assessments for Arabic language learners.Therefore, it is crucial to consider the proficiency of Arabic language teachers in these components when designing assessments for Arabic language learners.
Despite the limitations of this study, such as the small sample size and the focus on specific knowledge components, the findings provide valuable insights for future research in the field of Arabic language teaching.Future research could explore the interplay of these knowledge components with other factors, such as teaching strategies, classroom practices, and student outcomes, to gain a more comprehensive understanding of Arabic language teachers' proficiency and its impact on Arabic language education.This study contributes to the literature on Arabic language teaching by highlighting the importance of Nahwu, Shorof, Balaghah, and Mu'jamiyah as essential components of Arabic language teachers' knowledge content.The findings have implications for teacher education, curriculum development, and assessment practices and call for further research to enhance our understanding of Arabic language teachers' proficiency and its implications for Arabic language education.

3. 1 . 3 .
Determining the Number of Factors.Determining the number of factors is done by examining the cumulative percentage of variance explained by the extracted factors.Table

FIGURE 1 :
FIGURE 1: Infit mean square of questions in Package 1.

Figure 2
displays the TIF and SEM for Package 1.

TABLE 1 :
Demographic profile of respondents based on gender, years of teaching experience, and teaching institution.
3.1.4.Validity and Reliability.In the context of EFA, various types of validity and reliability measures are commonly employed.These include determinant validity, which assesses the validity of factors identified in the EFA analysis; convergent validity, which evaluates the similarity of relationships among measurement variables that are purported to measure the same construct as the identified factors; and reliability, which gauges the consistency of results produced by the measurement tool.The utilization of validity and reliability measures in EFA analysis is essential to ensure the accuracy, consistency, and validity of the identified factor analysis results.Based on the findings presented in Table

TABLE 5 :
Difficulty level categories for question Package 1.

TABLE 6 :
Proficiency of arabic language teachers in answering questions in Package 1.

TABLE 9 :
Component, comunality, and reliability statistics Package 2. Validity and Reliability.There are several types of validity and reliability commonly used in EFA analysis, namely: determinant validity, which measures the validity of the factors identified in the EFA analysis.Convergent validity measures the appropriateness of the relationships between the measurement variables considered to measure the same construct as the identified factors.Reliability, which measures the consistency of measurement results.It is important to use validity and reliability in EFA analysis to ensure the accuracy, consistency, and validity of the identified factor analysis results.Based on the analysis results presented in Table

TABLE 9 :
Continued.Balaghah has the highest number of questions categorized as moderate to easy compared to other dimensions.An interesting finding is that there are no questions categorized as difficult in this category, whereas a test instrument should ideally have 25%-30% of difficult questions to assess proficiency.This could be due to the initial item reduction analysis indicating that difficult questions did not significantly contribute to measuring the Arabic language content knowledge of teachers.3.4.2.Arabic Language Teachers' Proficiency.Table11presents information on the proficiency of Arabic language teachers in answering Package 1 questions, categorized into three levels: low, moderate, and high, based on the θ (theta) values measured in logit scale.

TABLE 10 :
Difficulty level categories for question Package 2.
FIGURE 3: Infit mean square of Package 2 questions.

TABLE 11 :
Arabic language teachers' proficiency in answering questions in Package 2.