This document discusses the nature and definition of psychological testing. It begins by defining psychological testing as the systematic process of measuring variables like aptitude, personality, intelligence, and behavior through standardized measures. The purpose of psychological testing is then outlined, including understanding individual differences, assessing abilities and aptitudes, diagnosing psychological disorders, and predicting future behaviors. The document goes on to describe different types of psychological tests based on criteria like whether they are administered individually or in groups, how they are scored objectively or subjectively, time limits, the nature of test items, how standardized they are, and their intended purpose. Key characteristics of psychological tests like standardization, reliability, validity, and objectivity are also discussed. The document concludes by noting