What type of test measures psychological constructs?

Projective tests are designed to measure psychological constructs by eliciting responses that reveal an individual's thoughts, feelings, and motivations. These tests often involve ambiguous stimuli, such as pictures or open-ended questions, allowing individuals to project their unconscious processes and personal experiences onto the material. For instance, a common projective test is the Rorschach inkblot test, where individuals interpret inkblots, and their interpretations can provide insight into their personality traits and emotional functioning.

In contrast, objective tests typically consist of standardized questions with fixed responses, designed to assess specific traits or abilities in a more structured manner. Achievement tests evaluate what a person has learned or accomplished in a particular subject area, while aptitude tests assess an individual's potential to succeed in certain tasks or fields. However, these types of tests do not access the deeper psychological constructs as effectively as projective tests do.