Index and guide to measurement instruments (questionnaires, interview schedules, checklists, index measures, coding schemes/ manuals, rating scales, projective techniques, vignettes/scenarios, tests) in the health fields, psychosocial sciences, organizational behavior, and library and information science. HAPI assists researchers, practitioners, educators, administrators, and evaluators, including students, to identify measures needed for research studies, grant proposals, client/patient assessment, class papers/projects, theses/dissertations, and program evaluation.