International consortium of 750+ academic and research organizations, Inter-university Consortium for Political and Social Research (ICPSR) provides data access, curation, and methods of analysis for social sciences research.
Ready-to-use research instruments; wide variety of tests and measures including aptitude tests, personality scales, and cognitive functioning measures. Structured information on scope, test implementation, test development, and reliability and validity data. Coverage dates: 1910 - present
HaPI - User Guide (PDF)
Measurement instruments (i.e. questionnaires, interview schedules, checklists, coding schemes, rating scales, etc.) in the fields of medicine, nursing, public health, psychology, social work, communication, sociology, and organizational behavior/ human resources. Uses published peer-reviewed content.
Mental Measurements Yearbook contains full-text reviews of testing instruments in psychology, education, business and leadership. Coverage dates: 1938 - present.
Tests in Print is a comprehensive bibliography to all known commercially available tests that are currently in print in the English language.