A researcher is studying the social effects of being learning disabled.This study is ex post facto because the
A) subjects are already known to differ on the dependent variable.
B) subjects are already known to differ on the independent variable.
C) a and b
D) None of these are true.

Question

Quizplus · Accepted Answer

In an ex post facto study, the researcher does not manipulate the independent variable but selects subjects based on pre-existing differences in this variable. In this case, the independent variable is being learning disabled, and subjects are selected based on their status regarding this condition, hence they are known to differ on the independent variable.

A Researcher Is Studying the Social Effects of Being Learning