Two Sets of Identical Twins Are Given an Intelligence Test

question 131

Multiple Choice

Two sets of identical twins are given an intelligence test. One set of twins was reared by the same parents, while the second set of twins was separated at birth. Which set of twins will show highly similar intelligence test scores?

• A) only the set of twins reared together
• B) only the set of twins reared apart
• C) Both sets of twins, but the score for the twins reared together will be more similar than the twins reared apart.
• D) Neither set of twins will show a higher degree of similarity than two randomly chosen people.

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Definitions:

Secondary Circular Reaction

is a developmental phase in early childhood identified by Piaget, in which infants repeat actions that affect the environment, indicating the beginning of intentional behavior.

Primary Circular Reaction

The stage in early infancy when a child begins to repeat actions on their own body that originally occurred by chance, indicating early cognitive development.

Babinski Reflex

The Babinski reflex is a neurological sign observed in infants when the sole of the foot is stroked, the big toe moves upward or toward the top surface of the foot, and the other toes fan out.

Tertiary Circular Reaction

A stage in Piaget's theory of cognitive development where infants try out new behaviours to see what results they have, displaying early elements of experimentation.