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 these

Question

Quizplus · Accepted Answer

All three options (item sampling, environment-related variables, and testtaker variables) can contribute to error variance in test scores. Therefore, choice D is the correct answer.

A Source of Error Variance May Take the Form of