Health and Psychosocial Instruments (HaPI) Provides ready access to information on 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. Please note that HaPI does not include the actual research instruments. See the Mental Measurements Yearbook (Buros) for additional references to research instruments, tests, and assessments.