psychologists must evaluate the validity of measures in order to determine the extent to which selection tools predict job performance. In order to do this, they look at content validity, construct validity, and/or criterion validity.
A major function of psychologists is to design recruitment processes and personnel-selection systems. Personnel recruitment is the systematic process of hiring and promoting personnel. It includes developing job announcements, placing ads, defining key qualifications for applicants, and screening out unqualified applicants. Personnel-selection systems employ evidence-based practices to determine the most qualified candidates for a job. Common selection tools include ability tests, knowledge tests, personality tests, structured interviews, the systematic collection of biographical data, and work samples.