Mark Has Just Finished a Longitudinal Twin Study of Intellectual

question 35

Multiple Choice

Mark has just finished a longitudinal twin study of intellectual performance.He included both identical and fraternal twin pairs in his study.Based on previous research,what would you predict he will find regarding age-related changes in the similarity of their intellectual scores?

• A) Similarity will increase for identical twins and decrease for fraternal twins.
• B) Similarity will decrease for identical twins and increase for fraternal twins.
• C) Similarity will remain constant for identical twins and increase for fraternal twins.
• D) Similarity will remain constant for fraternal twins and will decrease for identical twins.

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