Students ’ Online Learning Adoption during an Emergency Situation: Integrating the Self-Determination and Perceived Risk Theories

. By integrating self-determination theory and perceived risk theory, the current research proposes a new model to predict students ’ online learning adoption during an emergency situation such as the COVID-19 pandemic. More speci ﬁ cally, it is aimed at exploring how online communication self-e ﬃ cacy, online learning belonging, and perceived risk predict students ’ online learning adoption. A printed questionnaire was developed to collect data from 487 Vietnamese students using a quota sampling method. After missing data and outliers were removed, 450 questionnaires were found to be usable for data analysis. SMARTPLS version 3.2.2 was employed to analyze PLS-SEM and test the proposed hypotheses. The study found that online communication self-e ﬃ cacy and perceived risk both have direct e ﬀ ects on students ’ online learning adoption as well as indirect e ﬀ ects through the partial mediating role of online learning belonging. Our study also explored that perceived risk does not play a moderation in the association between online learning belonging and students ’ online learning adoption. These ﬁ ndings ﬁ ll important gaps in the literature and provide some implications for academicians, governments, educators, and parents in fostering students ’ adoption of online learning.


Introduction
The effects of the COVID-19 pandemic have been significant across various societal domains, including the field of education [1,2].In an effort to curb the spread of the virus as well as protect students, many schools and universities were forced to temporarily close their physical campuses and transition to online learning near the onset of the pandemic in order to continue their educational programs [3,4].Since then, the rapid increase in online learning that took place during the period of school closures has prompted researchers to examine students' experiences and attitudes towards this mode of education.
Before the COVID-19 pandemic, research on online learning centered on topics such as the impact of information technology [5,6] and course design [7], instrument creation [8], and student adoption with e-learning courses [9][10][11][12].These studies, which focused on a standard educational setting, mostly used traditional models such as the technology acceptance model (TAM), the theory of planned behavior (TPB), the theory of reasoned action (TRA), or the unified theory of acceptance and use of technology (UTAUT).Their focus was to investigate the direct effects of factors such as perceived ease of use [10], performance expectancy, effort expectancy, hedonic motivation, and habit on students' technology adoption intention or behavior [12].
Since the outbreak of the pandemic, a few studies have been conducted on the efficacy of online learning during the period of school closures as well as afterwards.For example, Nong et al. [1] conducted a study on the impact of vaccinations on students' online learning intention.The authors proposed a moderated mediation model with perceived invulnerability playing a mediating role and the students' age having a moderating role.However, the study focused only on students' intrinsic motivation and did not consider external factors.Pham and Ho [13] conducted a study on the "new normal" of e-learning in Vietnamese higher education post-COVID-19, examining the policies of the Vietnamese government regarding the integration of e-learning into higher education.To the best of our knowledge, the study investigating students' attitudes towards e-learning during the COVID-19 pandemic was conducted by Ho et al. [3].However, the theoretical framework used in this study was the technology acceptance model (TAM), which may be suitable for studies on technology adoption, but insufficient for exploring other potential antecedents of e-learning during and after the height of the pandemic.
To overcome these limitations, many researchers have integrated traditional theories, such as TAM, TRA, TPB, and UTAUT, and contextual-related theories, including protection motivation theory (PMT) and perceived risk theory (PRT).For example, Doan [14] integrated TAM and PRT, and Nguyen and Tang [4] integrated TAM and PMT to explore antecedents of students' online learning intention in the COVID-19 context.Although these studies considered various factors related to the research context, such as perceived severity, perceived vulnerability, and perceived risk (PR), they did not pay attention to internal factors related to student competence, such as online communication self-efficacy (OCSE) and online learning belonging (OLB).Given the sudden shift to online learning that took place, it is important to understand intrinsic and extrinsic motivations that promote students' adoption of this learning mode.
Based on these research gaps, and in response to the call to expand self-determination theory (SDT), a widely accepted theory of motivation, with other suitable theories or frameworks [15], the current study integrates SDT and PRT in the context of the COVID-19 pandemic, to propose a moderated-mediation model exploring determinants of students' online learning adoption (SOLA) through the mediation of OLB and moderation of PR.The integration of self-determination and perceived risk theories offers a unique and crucial perspective on the factors that influence students' decisions to adopt or reject online learning in this global emergency situation.By exploring the interplay between SDT and PRT in students' online learning adoption during the height of the COVID-19 pandemic, the current study is aimed at filling an important gap in the literature.The findings of this study can provide valuable insights for governments, educators, policymakers, and parents as they work to support students' continued education during challenging times.Toward this end, the current study proposes the following research questions (RQs): RQ1: what are the determinants of students' online learning adoption during an emergency situation, and how do they differ in predictive power?RQ2: does online learning belonging mediate the relationships between, on the one hand, online communication self-efficacy and perceived risk and, on the other, students' online learning adoption?
RQ3: does perceived risk moderate the relationship between online learning belonging and students' online learning adoption?
2. Literature Review 2.1.Theoretical Background 2.1.1.Self-Determination Theory.SDT is a comprehensive theory of human motivation and personality that emphasizes the importance of the basic psychological need for autonomy, competence, and relatedness for psychological well-being and healthy development [16][17][18].According to SDT, when these three basic psychological needs are satisfied, people tend to be more motivated and engaged in their activities.Furthermore, SDT also suggests that people are more likely to participate in activities that align with their intrinsic motivations and values.Students who are intrinsically motivated to learn and value education, for example, are more likely to engage and motivate themselves in their learning activities [19].
In the online learning context, the theory suggests that students who feel autonomous in their learning process, connected to others in their online learning community, and competent in their online learning skills are more likely to be motivated and engaged in their online learning experience [20,21].SDT is suitable for the present study for several reasons.First, SDT provides a theoretical framework for understanding students' motivations for adopting online learning during a crisis situation, such as the COVID-19 pandemic, by highlighting the role of personal autonomy and competence in promoting engagement and well-being.Second, SDT has been widely tested and validated in various educational settings and has been found to be a strong predictor of students' engagement and academic performance [21].
Therefore, the present study incorporates SDT to provide a deeper understanding of the psychological factors that influence students' adoption of online learning during an emergency situation and to help researchers identify the strategies that can promote autonomy, relatedness, and competence in online learning.Two factors, namely, OCSE and OLB, are used as indicators of these psychological determinants since they are known as intrinsic motivators that promote students' adoption of online learning.
2.1.2.Perceived Risk Theory.Bauer [22] was the first to propose the concept of PRT, in which PR was defined as an individual's perception of risk, representing subjective opinions or value judgments in the presence of multiple objective threats within uncertain situations.In the context of this study, PR specifically denotes students' perceptions of the severity of the COVID-19 pandemic.Various previous research works have highlighted that a heightened level of perceived risk can impact human attitudes and behavioral intentions toward the adoption of preventive measures.

2
Human Behavior and Emerging Technologies Additionally, differences in perceived risk have been identified as drivers for changes in human behavior [4,23].
In the context of online learning, the theory suggests that students' perceptions of the risks and benefits associated with online learning will influence their decision to adopt it during an emergency situation such as the COVID-19 pandemic.For example, students may perceive the benefits of online learning as including not only flexibility and convenience but also a reduced infection risk of COVID-19 [4].The present study adopts PRT as one of the theoretical lenses for studying online adoption for the following reasons: first, since PR is known as an extrinsic motivator that alters students' perceptions of the transition from face-to-face to online learning, PRT provides a theoretical framework for understanding how students' perceptions of risk might influence their behavior.Second, PRT has been widely tested and validated in various educational settings and has been found to be a strong predictor of students' adoption of technology [14,24].
By integrating PRT with SDT, the present study provides a model for studying both the intrinsic and extrinsic factors that influence students' adoption of online learning during an emergency situation such as the COVID-19 pandemic.This integration contributes to fill important gaps in the existing literature.

Online Communication Self-Efficacy, Online Learning
Belonging, and Online Learning Adoption.OCSE refers to students' beliefs in their ability to effectively communicate and use technology in online environments by asking questions, expressing emotion, and discussing ideas [25,26], whereas OLB refers to students' sense of connectedness and integration in the online learning community [27].Based on SDT, we argue that students' confidence in their ability to communicate effectively online will influence their sense of belonging in the online learning environment.Stated otherwise, we predict that students with a high level of OCSE will be more likely to feel a strong sense of belonging in this environment.The reason is that these students are better equipped to participate in online communication and form relationships with their peers and instructors [25].Previous studies support these arguments.As Kim and Park [28] found, a positive relationship exists between OCSE and online social presence, which is a key aspect of online learning belonging.The authors also indicated that those with a higher level of OCSE were more likely to participate in online discussions, collaborate with their peers, and form relationships in the online learning environment, leading to a stronger sense of belonging [28].Additionally, Strayhoen [29] found that students feel more confident participating in online activities if they have abilities and skills in online communication, that is, a high level of OCSE.
Previous studies have also linked high levels of OCSE to positive outcomes in online learning, such as increased participation and engagement [25,28,30], and several studies have demonstrated that a lack of OCSE may lead to a higher dropout rate in the online learning environment [25,[30][31][32].The reason for the latter finding is that students lack opportunities to interact with others in an online learning environment and can, therefore, become socially isolated, bored, and uninterested in the online courses [25,30,33].Regarding the former finding, OCSE has been demonstrated to be a predictor of online learning satisfaction [30], which increases students' engagement and participation [34,35].It follows that it plays a crucial role in enhancing online education, serving as a pivotal element for academic success in distance learning [31,32].
Another important determinant of success in distance education is a strong sense of belonging in the online environment.Previous studies have linked OLB with increased engagement, motivation, and academic performance [29,36,37].These studies argue that a sense of belonging can help students succeed by lowering psychological distress and the concomitant risk of developing mental health problems by increasing engagement, motivation, and participation [29,36,37].Research has demonstrated that a sense of belonging serves as a potent source of resilience for students, fortifying them against disengagement from active participation in the learning process [38].Peacock et al. [39] indicated that fostering a sense of belonging in the online learning environment may provide a means of improving students' experiences and attainment while also lowering attrition rates.Based on these arguments, we argue that a sense of online learning belonging will foster online learning adoption and mediate the relationship between OCSE and SOLA.Hence, the following hypotheses are proposed: H1: online communication self-efficacy has a positive effect on students' online learning belonging.
H2: online communication self-efficacy has a positive effect on students' online learning adoption.
H3: online learning belonging has a positive effect on students' online learning adoption.
H4: online learning belonging mediates the relationship between online communication self-efficacy and students' online learning adoption.

Perceived Risk, Online Learning Belonging, and Online
Learning Adoption.In the context of the COVID-19 pandemic, several researchers have applied PRT to explore the role of PR in predicting human behavioral changes [4,14,24].Although the relationship of PR and OLB has not been explored in previous studies, the perception of risk associated with COVID-19 has proven to be an external factor that drives students to adopt a learning method like online learning [40,41].In addition, although previous studies have shown that students almost always prefer face-to-face learning to online learning, this preference has changed in the COVID-19 pandemic situation.In the face of the complicated evolution of the epidemic and its high level of risk, students quickly adapted to the online environment and felt more familiar with online learning than ever before [40,41].As Nguyen and Tang [4] indicated, the perception of severe danger in face-to-face environments led to changes in students' attitude and perceptions of online learning.From these observations, we argue that PR will foster OLB, as the following hypothesis states.H5: perceived risk has a positive effect on online learning belonging.
Several prior studies using PRT to explore human behavior in pandemics have indicated that the situation's severity is the main factor contributing to protection motivation and the subsequent adoption of avoidance behavior.The negative effects of public relations are frequently highlighted in consumer behavior studies, such as in the context of travel [42], mobile financial services [43], and e-government [44].In the context of online learning, Doan [14] has also indicated that PR fosters students' online learning intentions because school attendance puts students in direct contact with many people, which increases their chances of contracting COVID-19.It follows that if students perceive a heightened risk of COVID-19 infection, their desire to learn online will be stronger.This risk may be perceived as high if students are made aware of the possibility of COVID-19 transmission through direct person-to-person contact [4,14].In addition, Procentese et al. [45] have found that in an emergency situation like COVID-19, a sense of belonging protects against academic stress and contributes to higher retention rates in online learning.Based on these findings, we argue that OLB can be a mediator in the association between PR and SOLA.The following hypotheses test these relationships: H6: perceived risk has a positive effect on students' online learning adoption.
H7: online learning belonging mediates the relationship between perceived risk and students' online learning adoption.
2.2.3.Perceived Risk as a Moderator.Several studies have shown that people's attitudes and behavior intentions can change in response to exposure to heightened levels of risk, and that variations in risk perception can lead to variations in people's actual behavior [4].Moreover, those who are highly attuned to potential danger are more likely to be proactive about preventing harm to themselves [46].At the beginning of the pandemic, online learning was proposed to lower the risk of contracting COVID-19 in schools and in the community [4,14].Based on this rationale and the abovementioned studies on OLB, we contend that students with a higher level of OLB will adopt online learning more readily and that this receptivity will be further bolstered when they have a higher level of risk perception.The following hypothesis expresses this expectation.
H8: the relationship between online learning belonging and students' online learning adoption will be stronger among students with a high level of risk perception.
Figure 1 shows the research model for this study.

Methodology
3.1.Instrument Development.Drawing from prior research, we developed a survey questionnaire.After a thorough examination of the literature, we identified studies employing analogous constructs and modified them to align with the parameters of the present study.Given that the initial constructs were in English, two English teachers were engaged to translate the questionnaire into Vietnamese, with an additional two English teachers enlisted for a backward translation process to safeguard the instrument's validity.Subsequently, three education experts were invited to evaluate the questionnaire.Following this, ten Vietnamese students were recruited to complete the questionnaire to ensure its face validity.Ultimately, a printed version of the questionnaire was prepared for data collection.The printed questionnaire includes three parts.The first one contains one question in which respondents were asked to indicate whether they participated in online learning during the COVID-19 pandemic.Those participants who responded "yes" in this section proceeded to the subsequent stage.Four demographic questions, including participants' gender, age, grade, and location, were comprised in the second section.The third one assesses the following four main factors of the current research.
OCSE measures students' perceptions of their ability to effectively communicate and use technology in an online environment, consisting of three items revised by Thongsri et al. [26].For example "I feel confident in using online tools (email, discussion) to effectively communicate with others." 4 Human Behavior and Emerging Technologies OLB measures students' sense of connectedness and integration in the online learning community, including four items adapted from Hazel et al. [47] and Yorke [48], for example, "In the COVID-19 period, most days, I look forward to take part in online classes." SOLA measures students' willingness to adopt online learning in the COVID-19 situation, including four items revised by Nguyen and Tang [4] and Thongsri et al. [26], for example, "I would like to take online-learning courses during the COVID-19 period." PR measures students' perception regarding the risk of the COVID-19 pandemic, including six items revised by Nguyen and Borazon [44].For example, "I find COVID-19 has a high infection rate." All of the constructs in this study utilized self-report scales employing a five-point Likert scale, ranging from 1 (strongly disagree) to 5 (strongly agree), and demonstrated an initial Cronbach's alpha value exceeding 0.7 [49].

Pilot Test.
A pilot survey with 73 respondents was performed prior to the official survey to ensure that participants could comprehend and respond to the questionnaire easily.Moreover, the data obtained from this survey was employed to assess the feasibility of the translation and calculate Cronbach's alpha value.The findings indicate that all principal constructs exhibit a Cronbach's alpha value surpassing the 0.7 threshold.

Data Collection and
Procedure.The printed questionnaire was directly distributed to 487 students in five universities placed in Ho Chi Minh City, Vietnam, from November 29 th to December 19 th , 2022.A quota sampling method was used to recruit participants from a population of around 20,000 students.Following this, data was imported into SPSS 22 software.After removing 29 missing data cases and 8 outliers, a total of 450 valuable cases were used for further investigation.Table 1 presents the respondents' demographic information.

Data Analysis Strategy.
For testing outliers, normal distribution, and generating descriptive statistics, the SPSS 22 software was employed.Instances with z scores exceeding ±3.29 (p < 001) were identified as outliers during the examination of univariate normality [50].Using this approach, 8 outliers were identified and subsequently eliminated from the dataset.
In addition, common method bias is often identified as the primary contributor to measurement errors in behavioral sciences.These errors could arise from factors such as a consistency motif, illusory correlations, implicit theories, leniency biases, and acquiescence.To identify potential bias, the study utilizes Harman's single factor test, wherein all items are loaded into a single un-rotated factor solution in exploratory factor analysis to evaluate the variance explained by this singular component.It is crucial that this singular component accounts for less than 50% of the variance in order to address and minimize potential bias.Our findings reveal a total variance for the single factor of 36.17%, which is below the 50% threshold recommended by Podsakoff et al. [51].Consequently, the present study is deemed free of common method bias.In simpler terms, the results indicate that the factor with the highest variance (36.17%) does not take the majority of the variance.As a result, variances associated with measurement error do not compromise the validity of the study's findings [44].Finally, SMARTPLS 3.2.2software was employed to test PLS-SEM.

Findings
4.1.Descriptive Statistics.Before advancing to further analyses, descriptive statistics were scrutinized.Table 2 displays descriptive statistics for the study constructs.
Cronbach's alpha for factors ranges from 0.842 to 0.879, which is higher than 0.70 but lower than 0.95, as shown in Table 3 [49].Furthermore, the outer loadings of all items are higher than 0.7.All of the latent variables have a CR ranging from 0.891 to 0.917.Finally, the AVE values for all latent variables fall within the range of 0.578 to 0.766.Overall, the measurement models in the study exhibit robust  [49] proposed that the inner VIF values should be lower than 5, and the present research discovered VIF values ranging from 1.053 to 1.282, falling within the recommended range, indicating that there was no issue of multicollinearity in the data in the present study.

Hypothesis Testing.
Bootstrapping is a method for assessing and testing the significance of a model.The T -statistics value gauges the significance of path coefficients [54].Table 5 displays the PLS-SEM results, indicating that the data substantiated all direct and indirect effects, with the exception of moderating hypotheses.
As can be seen from Table 5, all direct effect hypotheses were supported, and OLB is a mediator in the association between OCSE and SOLA as well as in the relationship between PR and SOLA.However, the moderator of PR in the association between OLB and SOLA was not supported, and the result model is depicted in Figure 2.

Comparing Predictive Power of Predictors.
To assess and compare the predictive power of antecedents in the research model, the F-square value was utilized in the present study.As per Cohen [55], the recommended benchmarks for F-square and R-square were as follows: F-square: 0.02 (small), 0.15 (medium), and 0.35 (large); R-square: 0.02 (weak), 0.13 (moderate), and 0.26 (substantial).The comparative predictive power among antecedents is detailed in Table 6.
Table 6 shows that antecedents could explain 40% of the variance in dependent variable (SOLA).This value is substantial [55], while 19% of the variance of OLB could be explained by predictors in the research model (moderate).Furthermore, OLB has the highest predictive power (0.26) in the research model, more than a medium effect size suggested by Cohen [55], while the interaction effect of PR * OLB has the lowest predictive power (0.00) for SOLA.

Determinants with Direct Relationships and the Relative
Impact of These Determinants on SOLA.Based on the integration of SDT and PRT in a united model, our research findings revealed that OCSE, OLB, and PR are all antecedents of SOLA during an emergency situation such as the COVID-19 pandemic.Interestingly, OCSE was demonstrated to have a positive effect on OLB.This relationship is consistent with the perspective of SDT, which supposes that students who feel autonomous in their learning process, connected to others in their online learning community, and competent in their online learning skills are more likely to be motivated and engaged in their online learning experience [20].In addition, OCSE was found to have a positive effect on SOLA.The finding is in line with previous studies, which maintain that a lack of OCSE may result in a higher dropout rate in an online learning environment and that a higher level of OCSE correlates with positive outcomes in online learning, such as increased participation and engagement [25,28,30].
Additionally, our findings also identified a positive relationship between OLB and SOLA.This is consistent with previous research indicating that a sense of belonging provides students with a powerful source of resilience, strengthening them against disengagement from actively participating in their learning [38].OLB also assists students in succeeding by reducing psychological stress and the risk of developing mental health problems, which in turn increases engagement, motivation, and participation [29,36,37].Furthermore, our findings indicated that PR positively affects both OLB and SOLA.This can be explained by PRT, which states that in an emergency situation, attitudes and behavioral intentions can change, depending on a person's perception of the level of risk the pandemic poses.Although previous research has indicated a positive association between PR and SOLA [4,14], an interesting finding A comparison of the determinants' predictive power revealed that OLB has the highest predictive power, whereas the interaction effect of PR * OLB has the lowest predictive power for SOLA.This finding demonstrates that a sense of belonging provides students with a powerful source of resilience, strengthening them against disengagement from effective participation in online learning [38].
5.2.The Mediating Role of Online Learning Belonging.Our study established a partial mediation of OLB in the association between OCSE and SOLA.This mediating role is explained as follows: students' abilities and skills in an online communication environment foster a sense of belonging that promotes their adoption of online learning [39].More precisely, when students have a high level of OCSE in online communication, they feel confident to participate in online activities, which translates as a sense of belonging.Such students find it easier to accept online learning [29,36,37,56].
Moreover, the study also showed that OLB partially mediates the association between PR and SOLA.This is   7 Human Behavior and Emerging Technologies explained by the emergency situation of the COVID-19 pandemic.In this situation, PR promotes students' belonging in an online learning [40,41], thereby increasing their intention to participate in and adopt online learning.The result is that PR has a near-significant impact on students' intentions to study online [4].
5.3.The Moderation of Perceived Risk.Although PR was indicated to have a direct effect on OLB and SOLA, the expected interaction effect between PR and OLB in the relationship between OLB and SOLA was not supported in the present study.The reason may be that in the COVID-19 context, online learning was known as a preventative measure of COVID-19 infection in school environments; it was also a required measure in Vietnam where the pandemic situation is complex.As a result, the relationship between OLB and SOLA did not vary among students according to their level of PR.

Conclusions
6.1.Theoretical Implications.This study is one of the pioneers in integrating SDT and PRT to explore SOLA.It, thus, represents a response to the call of Ryan and Deci [15], SDT's founders, to expand SDT with other suitable theories or frameworks [15] to form a unified research model.In this study, our research provided new insights (see Figure 2) for predicting SOLA in an emergency situation.The findings indicate that the addition of PRT to the SDT model can enhance its ability to account for contextual factors when predicting individuals' behavior in emergency situations.
The present study filled research gaps by exploring both intrinsic and extrinsic motivators of students' online learning adoption in an emergency situation.The two internal factors investigated were OCSE and OLB, whereas the external factor was PR.The study revealed that OLB partially mediates the relationship between OCSE and SOLA as well as the relationship between PR and SOLA.These findings constitute new insight into the mechanism, whereby OCSE and PR impact SOLA, especially in the context of online learning and the COVID-19 pandemic.
6.2.Practical Implications.Our study found that OCSE has a positive effect on both OLB and SOLA, indicating a need for students to develop online communication skills and abilities by accessing and familiarizing themselves with technology devices and the network environment prior to the adoption of online learning.Facilitating this development is the responsibility of both schools and students' families.The current study also revealed that a contextual factor, namely PR, has a positive effect on OLB as well as SOLA.Therefore, to boost students' adoption of and participation in online learning in an emergency situation, it is critical that educators and governments broaden and diversify their broadcasting of the dangers of COVID-19 and other emergencies.The information disseminated needs to include preventive measures to increase students' awareness and caution, increasing the likelihood that they will actively adopt and participate in online learning.
Lastly, since OLB was found to have the highest predictive power for SOLA, educators and policymakers should pay attention and give priority to fostering OLB in students.Encouraging self-discipline, providing a sense of comfort, and communicating the need for respect in the online learning environment may increase students' sense of belonging within this environment, thereby increasing their adoption of online learning.6.3.Limitations and Suggestions for Further Study.The present study adopted a quota sampling method, which may introduce bias into the results.Hence, it is recommended that future studies consider the use of a random sampling method to enhance the validity of the findings.Another limitation of the present study is its reliance on self-report scales, which may have led to common method biases also influencing the research findings.We, therefore, encourage future research to collect data from multiple sources to help reduce the likelihood of common method biases.Besides, there are also useful theories, like PMT, that can be used in an emergency situation to predict students' online learning adoption.Hence, for further studies, researchers may consider PMT like a contextual theory for online learning adoption in the emergency situation and compare the results obtained by both contextual-related theories (such as PRT and PMT).Finally, since the moderating role of PR was not established in our study, future studies may want to investigate its role further.

Figure 1 :
Figure 1: Research model.Note: mediating effect hypotheses are in parentheses.
* " means the "interaction effect" between PR and OLB.