Psychometrics is the branch of psychology (or statistics) which is concerned with the mathematical and statistical theory of test construction and test use. Literally "measurement of the soul", psychometrics is concerned with mental measurement, often (but not invariably) through the use of questionnaires and tests. Questionnaires involve onself or another person reporting behaviour (e.g., 'I feel nervous alone in the dark' as part of a test of anxiety) whilst tests require the behaviour to be demonstrated (e.g., the meaning of 'prescient' is (a) anticipating the future, (b) hairy, (c) bog-like).
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Free software for (advanced) psychometric analyses. Also a number of presentations on psychometrics.
Rasch Scaling information from MESA at the University of Chicago. Includes full text articles.
Offers online practice psychometric tests and courses developed by experienced psychologists.
Offers clinical assessment courses, counseling, training and the Wartegg testing methodology.
This website by Lawrence Rudner introduces Item Response Theory, and includes a complete on-line book.
Bounded optimisation code (FORTRAN) for numerical analysis, from Northwestern University.
John Uebersax's resource for researchers interested in latent class analysis and latent class models.
Resources focused on latent variable interactions and quadratics. Includes a bibliography, FAQ, Excel templates, full text articles, and full text monograph.
Albert Maydeu-Olivares' homepage at the University of Barcelona: includes some unpublished working papers.
Outline for Michael Friendly's course on multivariate data analysis and linear statistical models in behavioural science research. Includes bibliographies, computing guides, notes, and SAS examples covering topics such as regression, ANOVA, and factor analysis.
Matrix algebra interpreter and numerical optimizer for structural equation modeling and other types of statistical modeling of data. Includes documentation and example code.
Shareware for designing, applying, developing, and evaluating psychometric scales. The software features a scale editor, reliability analysis, central results database and other features.
Developer of online and psychology-based psychometric test materials designed to screen and match individuals to particular roles, industries and companies.
Independent group of UK psychometric practitioners. Includes information on the benefits of membership, how to join, news, events and FAQ.
Research results, questionnaires and publications of the Psychometrics Research Unit (University of Valencia, Spain). Content a mixture of English, Spanish, Valencian and Portuguese.
Print journal of the Psychometric Society. Subscription and submission information and author instructions.
Clear introduction to the nature and assessment of test reliability and validity.
Statistical software for the social sciences. Includes LISREL for structural equation modeling, HLM for hierarchical data analysis, and BILOG, BILOG-MG, MULTILOG, PARSCALE, and TESTFACT for IRT-based test analysis.
Online textbook providing overview of factor analysis, by political scientist RJ Rummel.
Software to construct linear measures from ordered qualitative observations. Includes details of training workshops; free student version and manual available for download.
Free software for (advanced) psychometric analyses. Also a number of presentations on psychometrics.
Albert Maydeu-Olivares' homepage at the University of Barcelona: includes some unpublished working papers.
John Uebersax's resource for researchers interested in latent class analysis and latent class models.
Independent group of UK psychometric practitioners. Includes information on the benefits of membership, how to join, news, events and FAQ.
Offers online practice psychometric tests and courses developed by experienced psychologists.
Offers clinical assessment courses, counseling, training and the Wartegg testing methodology.
Clear introduction to the nature and assessment of test reliability and validity.
Developer of online and psychology-based psychometric test materials designed to screen and match individuals to particular roles, industries and companies.
Shareware for designing, applying, developing, and evaluating psychometric scales. The software features a scale editor, reliability analysis, central results database and other features.
This website by Lawrence Rudner introduces Item Response Theory, and includes a complete on-line book.
Print journal of the Psychometric Society. Subscription and submission information and author instructions.
Software to construct linear measures from ordered qualitative observations. Includes details of training workshops; free student version and manual available for download.
Resources focused on latent variable interactions and quadratics. Includes a bibliography, FAQ, Excel templates, full text articles, and full text monograph.
Bounded optimisation code (FORTRAN) for numerical analysis, from Northwestern University.
Outline for Michael Friendly's course on multivariate data analysis and linear statistical models in behavioural science research. Includes bibliographies, computing guides, notes, and SAS examples covering topics such as regression, ANOVA, and factor analysis.
Research results, questionnaires and publications of the Psychometrics Research Unit (University of Valencia, Spain). Content a mixture of English, Spanish, Valencian and Portuguese.
Matrix algebra interpreter and numerical optimizer for structural equation modeling and other types of statistical modeling of data. Includes documentation and example code.
Rasch Scaling information from MESA at the University of Chicago. Includes full text articles.
Statistical software for the social sciences. Includes LISREL for structural equation modeling, HLM for hierarchical data analysis, and BILOG, BILOG-MG, MULTILOG, PARSCALE, and TESTFACT for IRT-based test analysis.
Online textbook providing overview of factor analysis, by political scientist RJ Rummel.
