Projective personality tests are those that provide vague stimuli designed to trigger projection of one's inner dynamics, the unconscious mind.
The Thematic Apperception Test (TAT) is one in which an ambiguous picture is shown to a subject and the individual makes up a story about it. This was intended to reveal the inner feelings and interests of individuals.
The Rorschach Inkblot Test identifies people's inner feelings by analyzing their interpretations of symmetrical inkblots.
The criticisms of projective personality tests like the Rorschach Inkblot Test include the fact that they lack both reliability and validity. In terms of reliability, when the same patient is evaluated by different people, they came up with different interpretations which means that the test cannot be repeated with the same results. In terms of validity, projective tests may misdiagnose a normal individual as pathological which means they do not answer the question that is asked.