Chapter 1: introduction understanding and prediction of behavior. What a test is: test: measurement device or technique used to quantify behavior or aid in, a test measures only a sample of behavior, and error is always associated with a sampling process. Item: specific stimulus to which a person responds overtly response can be scored or evaluated. Items are the specific questions or problems that make up a test: psychological test (educational test): a set of items that are designed to measure characteristics of human beings that pertain to behavior. Takes place within an individual, cannot be directly: scales: relate raw scores on test items to some defined theoretical or empirical distribution. Why use a test: testing is a way of fighting fascism human qualities. Psychological testing combats fascism by demonstrating the rich variety of. Our interest in testing reflects the idea that individual people are important in.