A general aptitude test correlates .45 with success in a particular college.To improve the predictive accuracy, the students are also given three other aptitude measures, all of which correlate very highly with one another and with the first test.What will be the likely effect of adding the scores from the three additional tests to the regression equation?
A) Predictive accuracy will significantly improve.
B) Only a very small improvement will occur.
C) Predictive accuracy will decrease slightly.
D) Cannot estimate from the information given.

Question

Quizplus · Accepted Answer

The three additional tests are highly correlated with the general aptitude test, which means that they are already measuring much of the same variance in determining college success. Adding them to the regression equation may slightly increase the predictive accuracy, but only to a small extent. There is no indication that the addition of these tests will significantly improve or decrease predictive accuracy, so option B is the best choice.

A General Aptitude Test Correlates