2(a -3) + 4b - 2(a -b -3) + 5 a. 6b+5 b. 8b-2 c. 6b-5 d. no simplified answer

Kilgore trout creates a new scale to diagnose depression. however, his scale only assesses one symptom of depression while ignoring others. which of the following is his new scale most likely lacking? a) test-retest reliability b) discriminant validity c) criterion validity d) alternate-forms reliability e) content validity f) none of the above