Evidence of the homogeneity of a test can be found in the
A) correlation between a test and some criterion.
B) correlation between test items and total test scores.
C) correlation between subtest scores and total scores.
D) Both correlation between test items and total test scores and correlation between subtest scores and total scores.

Question

Quizplus · Accepted Answer

The homogeneity of a test refers to the extent to which the test items measure the same construct or skill. Both the correlation between test items and total test scores and the correlation between subtest scores and total scores can provide evidence of homogeneity. If the items on a test are homogenous, then they should be highly correlated with one another, and the total test score should reflect a common underlying construct. Similarly, if subtests that measure different aspects of the same construct are highly correlated with the total score, this is also evidence of homogeneity. Therefore, both of these correlations are important for establishing the homogeneity of a test.

Evidence of the Homogeneity of a Test Can Be Found