Health & Psychosocial Instruments (HAPI) This link opens in a new windowHAPI provides access to information on measurement instruments (i.e., questionnaires, interview schedules, checklists, index measures, coding schemes/manuals, rating scales, tests) in the health fields, psychosocial sciences, organizational behavior, and library and information science. HAPI assists in the identification of measures needed for research studies, grant proposals, client/patient assessment, theses/dissertations, and program evaluation.