Psychometrics: Psychometrics is a field of study within psychology that focuses on the measurement of psychological traits, abilities, and attitudes. It involves the development, validation, and application of tests and assessments to gather objective data about individuals’ cognitive, emotional, and behavioral characteristics.

Subfields of Psychometrics:

• Test Development: This subfield is concerned with the creation and design of psychometric tests and questionnaires. It involves selecting or creating appropriate test items, establishing reliability and validity, and standardizing the testing procedures.
• Psychometric Analysis: This subfield involves analyzing the data collected from psychometric tests using various statistical techniques. It includes measures such as item analysis, factor analysis, and reliability analysis to assess the quality and psychometric properties of the assessments.
• Test Validation: Test validation focuses on determining the extent to which a test accurately measures what it intends to measure. This process involves collecting evidence to support the interpretation and use of test scores, such as criterion-related validity, construct validity, and content validity.
• Assessment and Measurement: This subfield broadens the scope beyond traditional tests to include the measurement of constructs in everyday life, such as personality traits, interests, or job performance. It encompasses methodologies like self-report surveys, observations, interviews, or performance evaluations.
• Psychometric Evaluation: Psychometric evaluation involves critically evaluating the reliability, validity, and fairness of assessments. It aims to identify potential biases, measurement errors, or limitations of the instruments being used.
• Item Response Theory: Item Response Theory is a mathematical framework used to model how individuals respond to test items. It provides a foundation for developing and improving the precision and accuracy of psychometric tests.