Asked by Pritpal Rupal on Apr 28, 2024
Verified
A psychologist conducts research using the twin-study method. He administers a need for Achievement scale to sets of monozygotic and dizygotic twins and finds a correlation of .50 between the scores for pairs of monozygotic twins. If this study is to demonstrate evidence for a genetic influence on need for Achievement, what would we expect the correlation to be between scores for pairs of dizygotic twins?
A) Higher than .50
B) Lower than .50
C) Very close to .50
D) There is no way to demonstrate a genetic influence with these data.
Need for Achievement
A psychological trait referring to an individual's desire for significant accomplishment, mastering of skills, control, or high standards of success.
Monozygotic Twins
Identical twins that develop from one zygote, which splits and forms two embryos, sharing exactly the same genetic material.
Dizygotic Twins
Also known as fraternal twins, these are siblings that are born at the same time but have developed from two different eggs fertilized by two different sperm.
- Grasp the crucial role that statistical correlations play in twin studies for determining the genetic contribution to traits like self-esteem.
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Learning Objectives
- Grasp the crucial role that statistical correlations play in twin studies for determining the genetic contribution to traits like self-esteem.
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