Professor Golder is studying hyperactivity in preschool-age children.She is concerned that differences in child rearing,diet,and home environment may affect her results.To minimize these potential pre-existing variables,she should be sure to do which of the following?
A)Use random assignment when forming her groups.
B)Include more than one independent variable.
C)Only measure a single dependent variable.
D)Only select children from homes with a high socioeconomic status (SES).

Question

Quizplus · Accepted Answer

By using random assignment when forming her groups, Professor Golder can ensure that any pre-existing variables are equally distributed among the groups. This helps to minimize the impact of these variables on her results. Including more than one independent variable or only measuring a single dependent variable would not address the concern about pre-existing variables. Only selecting children from homes with a high socioeconomic status (SES) would introduce bias and limit the generalizability of her findings.

Professor Golder Is Studying Hyperactivity in Preschool-Age Children