The reliability coefficient for a measure can reflect: (circle all that apply)
A) the extent that observed scores at Time 1 and Time 2 can be attributed to true score differences rather than random error
B) the correlation between Group 1's set of scores on a measure and Group 2's set of scores on the same measure
C) the correlation between Time 1 and Time 2 scores for the same people on the same measure
D) the (un)likelihood that observed differences between Time 1 and Time 2 scores are due to a regression artifact

Question

Quizplus · Accepted Answer

The reliability coefficient reflects the extent to which observed scores at different times for the same individuals are due to true score differences or random error (A) and the correlation between these scores (C). Option B is describing the concept of validity, not reliability. Option D is not relevant to the concept of reliability.

The Reliability Coefficient for a Measure Can Reflect: (Circle All