The research comparing the IQ scores of twins has what limitation?
A)Most of the data come from children of prisoners and mental patients.
B)Most of the data come from families with more than four children.
C)Most of the data come from middle-class families.
D)Most of the data come from preschool children.

Question

Quizplus · Accepted Answer

The limitation of the research comparing the IQ scores of twins is that most of the data come from middle-class families, limiting the generalizability of the findings to other socioeconomic groups.

The Research Comparing the IQ Scores of Twins Has What