A source of error variance may take the form of
A) item sampling.
B) testtakers' reactions to environment-related variables such as room temperature and lighting.
C) testtaker variables such as amount of sleep the night before a test, amount of anxiety, or drug effects.
D) All of the above

Question

Quizplus · Accepted Answer

All of the choices listed (item sampling, testtakers' reactions to environment-related variables, and testtaker variables) are potential sources of error variance. Therefore, the best choice is D, which includes all of the above options.

A Source of Error Variance May Take the Form of