What is each expression written using each base only once?
(7.57)^ -4 x (7.57)^ 4
a. 8
b. 1
c. 0
d. 757^8

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