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Genetic Influence on Psychological Traits Quiz

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Genetic Influence on Psychological Traits Quiz

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Questions and Answers

What is the main reason why no complex traits are 100% heritable?

Heritability is caused by many genes of small effect.

What do phenotypic correlations between behavioral traits indicate?

Significant and substantial genetic mediation.

What is the main reason for the age-to-age stability in traits like intelligence?

Largely due to genetics.

What do most associations between environmental measures and psychological outcomes show?

Significant genetic mediation. Signup and view all the answers

Why are most environmental effects not shared by children growing up in the same family?

Most environmental effects are not shared due to significant genetic influence. Signup and view all the answers

How can genetic designs help in separating nature from nurture in family resemblance?

Genetic designs can identify the contributions of genes and environment in family resemblance. Signup and view all the answers

What is the likely percentage range of heritability for intelligence?

30-50% Signup and view all the answers

How can the theory of genetic influence on psychological traits be disproven?

Reliably measure a trait in an adequately powered study and find non-significant heritability. Signup and view all the answers

What type of studies generally support the conclusion of substantial genetic influence on traits?

Estimates from DNA alone Signup and view all the answers

What is the common disorder discussed in the text?

Abnormal psychology Signup and view all the answers

In the context of genetic mediation of behavioral traits, what does GWA studies stand for?

Genome-Wide Association studies Signup and view all the answers

What is the key finding related to complex traits and heritability?

No complex traits are 100% heritable. Signup and view all the answers

What explains genetic stability despite increasing heritability for intelligence?

Genetic 'amplification' via selective gene-environment correlation. Signup and view all the answers

What is the main cause of heritability?

Many genes of small effect. Signup and view all the answers

Which psychological traits show age-to-age stability largely due to genetics?

Personality, intelligence, psychopathology. Signup and view all the answers

What is the significance of controlling for genetic influence when studying environmental effects?

It allows for gaining the strongest evidence for the importance of environmental influence. Signup and view all the answers

What do most measures of the environment show according to the findings?

Significant genetic influence. Signup and view all the answers