Exam 10: The Biological Approach: Relevant Research

A researcher using the twin-study method finds an average correlation of .50 between monozygotic twins' scores on a measure of self-esteem.The researcher finds an average correlation of .30 between dizygotic twins' scores on this measure.The difference between the size of the correlations is statistically significant.What conclusion might the researcher draw from these results?

Personality researchers sometimes examine the personalities of children who were adopted shortly after birth.They do this because

Discuss the difference in preference for arousal between extraverts and introverts. Give two ways in which sensitivity to stimulation translates into behavior. What research evidence has been offered for the heritability of the extraversion?

Siblings' personalities may be similar because

Research on the genetic heritability of extraversion-introversion has made use of

A personality psychologist designs an experiment in which she plans to use the twin-study method.The psychologist is probably conducting research to examine the

Research finds that,compared to introverts,extraverts tend to

Based on research on extraversion-introversion,which piece of advice seems justified?

Those twins we commonly call "identical twins" are more technically called

The fact that friends often serve as a buffer against stress supports the idea that extraverts

Some investigators suggest that genetic influences on personality may not be seen unless a unique combination of more than one gene is inherited. Researchers refer to these complex influences as ________ effects.

Discuss the rationale behind the twin-study method and adoption studies of genetic influence. Give the general findings regarding the contribution of genetic influences on personality. Discuss any problems associated with each of these methods of research.

Two babies that come from different fertilized eggs may be

Research on genetic determinants of personality tell us that

According to evolutionary personality theory,men prefer physically attractive women because

Researchers using the twin-study method take advantage of which naturally occurring phenomenon?

Which of the following is a problem for the assumption that MZ and DZ twins are raised in equally similar environments?

You know a woman who has many friends and is often out having fun.But this woman also typically acts before thinking,thus bringing her a lot of trouble.This woman is probably

Each person born an introvert will develop a lower sensitivity to stimulation than those born extraverts.

Research on extraversion-introversion has found