You Are Developing a New Self-Report Measure of Depression

You are developing a new self-report measure of depression. You find that it has an internal consistency coefficient of .90 and a one month test-retest correlation of .80. It also has a correlation of r = -.10 with clinicians' ratings of the respondents' degree of depression. On the basis of this evidence, you would be justified in concluding that the measure has

A) both high reliability and high validity.
B) high reliability but low validity.
C) low reliability but high validity.
D) both low reliability and low validity.