Professor Cantu Develops a New Measure of Depression

Multiple Choice

Professor Cantu develops a new measure of depression. He finds that scores on his new measure correlate well with scores on existing well-validated measures of depression, but that scores on his new measure also correlate well with scores on well-validated measures of anxiety. The results of Professor Cantu's research suggest that there is a problem with the ________ of his new measure.

A) reliability
B) content validity
C) differential validity
D) discriminant validity