Behavioural-Genetic Studies Have Shown That

question 306

Multiple Choice

Behavioural-genetic studies have shown that:

• A) for children and adolescents, heritability estimates average around 0.75; that is, about three-quarters of the variance in IQ scores is explainable by genetic differences.
• B) for adults, heritability estimates average around 0.45 to 0.50; that is, about half of the variance in IQ scores is explainable by genetic differences.
• C) the scores of fraternal twins reared together are more highly correlated than the scores of identical twins reared apart.
• D) as adopted children grow into adulthood, the correlation between their IQ scores and those of their biologically unrelated family members diminishes to zero.

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Definitions:

Body Image

An individual's perception, thoughts, and feelings about their own body's appearance, which can influence self-esteem and behavior.

Bulimia Nervosa

An eating disorder marked by binge eating, followed by methods to avoid weight gain, such as vomiting, fasting, or excessive exercise.

Muscle Dysmorphia

A disorder characterized by an obsession with not being sufficiently muscular or lean, often leading to excessive exercising and bodybuilding.

Muscle Dysmorphia

A condition where there's an excessive preoccupation with not being muscular or lean enough, commonly resulting in over-exercising and extreme bodybuilding.