Identical (monozygotic) twins are recruited for a study of a new learning procedure to improve memory and factor out individual variation due to genetic differences. One from each pair of twins is randomly assigned to a learning procedure and the other is assigned to a control condition. This is a ______ design.
A) genetic
B) within-subjects
C) naturalistic
D) matched pairs

Question

Quizplus · Accepted Answer

This is a matched pairs design because the twins are matched based on their genetic similarity and one member of each pair is assigned to the experimental group and the other to the control group. This helps to eliminate the confound of genetic differences in the study's results.

Identical (Monozygotic) Twins Are Recruited for a Study of a New