Mining EEG with SVM for Understanding Cognitive Underpinnings of Math Problem Solving Strategies

We have developed a new methodology for examining and extracting patterns from brain electric activity by using data mining and machine learning techniques. Data was collected from experiments focused on the study of cognitive processes that might evoke different specific strategies in the resolution of math problems. A binary classification problem was constructed using correlations and phase synchronization between different electroencephalographic channels as characteristics and, as labels or classes, the math performances of individuals participating in specially designed experiments. The proposed methodology is based on using well-established procedures of feature selection, which were used to determine a suitable brain functional network size related to math problem solving strategies and also to discover the most relevant links in this network without including noisy connections or excluding significant connections.

What is the area of the square ABCD? S dere un pentágono y un hexágono. Todos los lados del pentágono son iguales, todos los lados del ono son iguales. Los lados del pentágono son iguales a los lados del hexágono. Indique la respuesta ta: . 4x + 3y = 2 form a mathematical set.

Problem 2
In the figure, the area of the triangle BCE is S. The area of the square ABCD is:
Indicate the correct alternative: a. p and q are true.
b. Only p is true.

Problem 4
Given the proposition: p = "With the solutions of the system of equations 4x + 3y = 2 4x + 3y = −2 it is possible to build a Set".
Indicate the correct alternative: a. p is false.
b. p is true.

Problem 5
The equation x 2 − 5x + 6 = 0 has as solutions the values 2 and 3. Given the following propositions: Indicate the correct alternative: a. Only r is correct.
b. Only q and r are correct.
c. Only p, r are correct.
Problem 6 Indicate the correct alternative: a. The number of elements ( c. Both intervals [−1, 1] and (−1, 1) have the same number of elements.

Problem 7
Given the sets A, B, C and the proposition p = "A ∪ C = B ∪ C implies that A = B". Indicate the correct alternative: a. The proposition p is true for all sets A, B and C.
b. The proposition p is false for any sets A, B and C.
c. The proposition is only true for certain sets.

Problem 8
If x, y are negative numbers, which of the following numbers are also negative?
a. Only II.
b. Only III.
c. Only I and II.

Problem 9
The rectangle A 1 is rotated 90 0 to obtain the rectangle A 2 d. Sólo I y II e. I, II y III

PROBLEMA 9
El rectángulo A 1 se rota en 90º hasta obtener el rectángulo A 2 90º A 1 A 2 Indicate the correct alternative: a. The area of rectangle A 1 is different from the area of triangle A 2 b. The areas of both rectangles are equal

Problem 10
The rectangle A is wound in the ways indicated in the figures to construct the cylinders B and C:

PROBLEMA 10
El rectángulo A se enrolla en las maneras indicadas en las figuras hasta construir cilindros: Indique la opción correcta: a. El volumen del cilindro C es mayor que el volumen del cilindro B b. El volumen del cilindro B es mayor que el volumen del cilindro C c. El volumen de ambos cilindros es el mismo d. No son comparables.

PROBLEMA 11
Dada la siguiente expresión: In which case(s) is the dash line, tangent to the solid line in point P?

PROBLEMA 17
Si x e y son números positivos tal que x y , se deduce correctamente que: c. In all cases

Problem 12
If x and y are positive numbers such that x > y, it follows correctly that: a. Only I is correct b. Only I and II are correct c. Only II and III are correct

Problem 13
If r, s, t, w are real numbers such that: r < 0, s < 0, t < s, and w > 0. Which one(s) of the following statements is(are) true? The sides of a right-angled triangle are a, b and c. Where c represents the length of the hypotenuse and a and b the lengths of the triangle's other two sides. Assume that the lengths of the sides a and b are variable. In order for the area of this triangle to remain constant, it must be observed that: a. The triangle's perimeter must be constant. b. One side must be directly proportional to the other. c. One side must be inversely proportional to the other.

Problem 16
A pencil and a notebook cost 150 pesos together. If the notebook costs 100 pesos more than the pencil, how much does each one cost? a. Notebook 100 and pencil 50.

Problem 17
The figure is the graph of the function derivative y = f (x)

PROBLEMA 13
Dos círculos están inscritos entre los lados de un triángulo isósceles y de un ángulo. Uno ángulo incluye a la base del triángulo y el otro pasa por el vértice opuesto, tal como muestr el radio del círculo a la izquierda, h es la altura del triángulo y R es el radio de círculo a la de cumple: a.

PROBLEMA 14
La figura de arriba es el gráfico de ( ) y f x ¢ = ¿cuál de los siguientes gráficos podría ser el d ( ) Which of the following graphs could be that of function y = f (x)?
RESPUESTAS CORRECTA E

ROBLEMA 13
s círculos están inscritos entre los lados de un triángulo isósceles y de un ángulo. Uno de los lados del gulo incluye a la base del triángulo y el otro pasa por el vértice opuesto, tal como muestra la figura. Si r es radio del círculo a la izquierda, h es la altura del triángulo y R es el radio de círculo a la derecha entonces se mple: a.