Applied Psychometric Society
Resource for professionals in psychometrics. Operated by Fordham University.
Institute for Objective Measurement
Rasch Scaling information from MESA at the University of Chicago. Includes full text articles.
L-BFGS-B Nonlinear Optimization Code
Bounded optimisation code (FORTRAN) for numerical analysis, from Northwestern University.
Maydeu-Olivares, Albert
Albert Maydeu-Olivares' homepage at the University of Barcelona: includes some unpublished working papers.
Multivariate Data Analysis
Outline for Michael Friendly's course on multivariate data analysis and linear statistical models in behavioural science research. Includes bibliographies, computing guides, notes,…
PMetric Psychometric Software System
Shareware for designing, applying, developing, and evaulating psychometric scales. The software features a scale editor, reliability analysis, central results database and other fe…
Principal Components and Factor Analysis
Chapter from StatSoft's Electronic Statistics Textbook.
Psychometrics Research Unit
Research results, questionnaires and publications of the Psychometrics Research Unit (University of Valencia, Spain). Content a mixture of English, Spanish, Valencian and Portugues…
Psychometrika
Print journal of the Psychometric Society. Subscription and submission information and author instructions.
Scientific Software International
Statistical software for the social sciences. Includes LISREL for structural equation modeling, HLM for hierarchical data analysis, and BILOG, BILOG-MG, MULTILOG, PARSCALE, and TES…
The Reliability of Measuring Instruments
Tom Knapp's book on reliability of measurement is freely available on this website.
Understanding Factor Analysis
Online textbook providing overview of factor analysis, by political scientist RJ Rummel.
Winsteps and Facets Rasch Analysis Software
Software to construct linear measures from ordered qualitative observations. Includes details of training workshops; free student version and manual available for download.