Abby is a psychologist who studies personality. which instrument would she most likely use in asking people about how they act or think in particular situations?

The answer is " self-report inventory".

A self - report inventory is a sort of mental test in which a man rounds out a study or poll with or without the assistance of an investigator. Self-report inventories regularly make coordinate inquiries about individual interests, values, manifestations, practices, and qualities or identity composes. Inventories are unique in relation to tests in that there is no objectively right reply; reactions depend on feelings and subjective discernments.