The primary theory of how measures like the Rorschach inkblot test and Thematic Apperception Test (TAT)work is that

a. people project their own personality and unconscious fears onto ambiguous, revealing such thoughts to the therapist.
b. People who suffer from serious psychopathology will have different neurological activity.
c. Depression and anxiety are "two sides of the same coin."
d. people are well-aware of their own personality issues and thus can honestly assess their own functioning in a pen-and-paper format.

Ans: a. people project their own personality and unconscious fears onto ambiguous, revealing such thoughts to the therapist.