Henry A. Murray and Christiana D. Morgan developed a projective psychological test known as "Thematic apperception test" at Harvard University. It is also known as picture interpretation technique.
Procedure:
The subjects are shown multiple ambiguous pictures so as to seek an involuntary response from them. Their perception of the images reveals hidden motives and the concerns of the society around them. The subjects narrate a story or their feelings about those pictures that includes what, how and why the event is happening. Such an event invokes involuntary display of subconsciousness in the subject. It explores the issues and themes related to the subject's life providing useful information in the psychological assessment.
You are limited to only what the first person narrator knows while writing in first person. In reality, you can't have the thoughts of another character, as it would change to another viewpoint. Let the other person betray his or her thoughts through conversation or motion.
