This book presents basic concepts in tests and assessment to contribute to a more intelligent understanding and use of psychological and educational tests. It focuses on the theory, techniques, and skills used to assess people and their behavior in context with the environment. Chapter topics include the history and meaning of assessment; basic statistical concepts in testing and assessment; reliability, validity, and test construction; objective personality assessment; projective and behavioral personality assessment; the nature and assessment of intelligence; the assessment of aptitudes, achievement, interests, work values, career development and maturity, and career indecision; environmental assessment; person-environment psychology and assessment; human development and assessment.; and professional and ethical standards and social issues in assessment. For use in guidance and counseling professions, social work, educational administration, and other areas in which a background in testing and assessment is needed.