Psychological measurement refers to the process of quantifying psychological traits, behaviors, and attributes. This can include assessments of intelligence, personality, and emotional well-being. Various tools, such as surveys, tests, and observational methods, are used to gather data, allowing researchers and practitioners to understand and compare psychological characteristics. The goal of psychological measurement is to provide objective and reliable information that can inform decisions in clinical settings, educational environments, and research. Commonly used instruments include the Minnesota Multiphasic Personality Inventory (MMPI) and Wechsler Adult Intelligence Scale (WAIS), which help in evaluating individuals' mental health and cognitive abilities.