Projective techniques such as sentence completion tests and drawing tests are personality tests that involve responding to ambiguous stimuli. They aim to reveal unconscious motivations by having subjects provide first responses to open-ended prompts. Widely used sentence completion tests include the Rotter Incomplete Sentences Blank and Washington University Sentence Completion Test. Common drawing tests are the Draw-a-Person test, where subjects draw a figure and it is analyzed, and the House-Tree-Person test, where subjects draw those items and are questioned about their images. While projective tests provide insights, they also lack standardized scoring and validity between examiners.