Which test presents subjects with a series of ambiguous pictures and asks them to develop a spontaneous story for each picture, assuming they will project their own needs into the story?

TAT (thematic apperception test)

Explanation:

The Thematic Apperception Test is a kind of projective test that entails describing indistinct and ambiguous scenes. It was test developed by psychologist Henry A. Murray an artist and lay psychoanalyst Christina D. Morgan during the period of 1930 1940. The test is one of the most broadly researched widely used psychological tests in recent times.

It is commonly used to research some specific topics in psychology, such as in mate selection, dreams and fantasies, the dynamics that influence people's choice of occupations, and some other similar subjects.