In the Context of Genetic Influences on Intelligence, a Classic

question 2

Multiple Choice

In the context of genetic influences on intelligence, a classic study in Louisville, Kentucky, found that:  

• A)the intelligence quotient scores of dizygotic twins were more alike than scores for any other pairs. 
• B)the correlations in intelligence between dizygotic twins were the same as those between other siblings. 
• C)correlations between the intelligence quotient scores of children and their foster parents and between those of cousins were strong. 
• D)dizygotic twins were more similar than monozygotic twins in spatial memory, ability to categorize things, and word comprehension.

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Definitions:

Gray's Model

A psychological theory that categorizes personality based on responsiveness to rewards and punishments, focusing on the behavioral inhibition and activation systems.

Nucleus Accumbens

is a region in the brain involved in the reward circuit, associated with pleasure, reinforcement learning, addiction, and fear.

Stability

The state of being resistant to change and maintaining the same conditions over time.

Serotonin

A neurotransmitter involved in many functions, including mood regulation, appetite, and sleep, often associated with feelings of well-being and happiness.