We are studying potential test bias using differential prediction. We find that the correlation between a test and the criterion we are trying to predict is exactly the same (say, r = .45) in groups A and B. Based on just that information, what can we conclude about slope bias and intercept bias?

Question

Quizplus · Accepted Answer

The correlation (r = .45) being the same in both groups A and B suggests that the slope of the prediction (which is related to the correlation) is the same for both groups, indicating no slope bias. However, it does not provide information about the intercept, meaning there could still be intercept bias.

We Are Studying Potential Test Bias Using Differential Prediction