If 50% of the variability in the scores on a test having a reliability of .90 is attributable to common factors, then the specificity of the test is __________ and the proportion of the test?s total variance that is due to error is __________.
A) .10, .40
B) .10, .50
C) .40, .10
D) .50, .10

Question

Quizplus · Accepted Answer

The specificity is the proportion of variance not explained by common factors, which is 1 - 0.50 = 0.50. The error variance is 1 - reliability, which is 1 - 0.90 = 0.10. The specificity is then 0.50 - 0.10 = 0.40.

If 50% of the Variability in the Scores on a Test