Forensic psychology
The Rorschach Ink Blot Test was developed in the 1930s by a man named Hermann Rorschach.   With this test, subjects were shown an ambiguous blot of ink on a page and were asked to describe what they see.  Based on the response of the subject, they are then evaluated using a scale which can then provide inferences about their personality characteristics as well as emotional functioning.  Based on the contributions of this test, it has been used in multiple court proceedings including but not limited to criminal, civil, domestic, and quasi-legal.