Error variance for measures of inter-item consistency comes from
A) fatigue.
B) motivation.
C) a testtaker practice effect.
D) heterogeneity of the content.

Question

Quizplus · Accepted Answer

The heterogeneity of content can contribute to error variance in measures of inter-item consistency because if the items are measuring different constructs or concepts, then a test taker's response variability may increase, leading to reduced consistency and increased error variance. Fatigue, motivation, and test-taker practice effects are more likely to contribute to error variance in measures of test-retest or inter-rater reliability.

Error Variance for Measures of Inter-Item Consistency Comes from