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» Paul Barrett    Free software for (advanced) psychometric analyses. Also a number of presentations on psychometrics.    http://www.pbarrett.net/

» Applied Psychometric Society    Resource for professionals in psychometrics. Operated by Fordham University.    http://www.fordham.edu/aps/

» Article: Increasing the Validity of Adapted Tests    Hambleton and Patsula (1999) article providing guidelines for adapting tests for cross-cultural and international uses--includes the ITC's Test Adaptation Guidelines.    http://www.testpublishers.org/journal01.htm

» Bayesian Factor Analysis    Describes the Bayesian approach to factor analysis, which incorporates prior information and eliminates the need for rotation. Includes some full-text articles.    http://www.biophysics.mcw.edu/BRI-people/Rowe/BFA.html

» Factor Analysis    Introduction to factor analysis, with worked examples.    http://www.psych.cornell.edu/Darlington/factor.htm

» Ingrid Yahoo Group    Free downloadable software for analysing repertory grids.    http://groups.yahoo.com/group/ingrid/

» Institute for Objective Measurement    Rasch Scaling information from MESA at the University of Chicago. Includes full text articles.    http://www.rasch.org/

» Item Response Theory    This website by Lawrence Rudner introduces Item Response Theory, and includes a complete on-line book.    http://edres.org/irt/

» L-BFGS-B Nonlinear Optimization Code    Bounded optimisation code (FORTRAN) for numerical analysis, from Northwestern University.    http://www.ece.northwestern.edu/~nocedal/lbfgsb.html

» Latent Class Analysis and Latent Class Models    John Uebersax's resource for researchers interested in Latent Class Analysis (LCA) and Latent Class Models. Includes factor analysis of binary data.    http://ourworld.compuserve.com/homepages/jsuebersax/

» Latent Variable Interactions and Quadratics    Resources focused on latent variable interactions and quadratics. Includes a bibliography, FAQ, Excel templates, full text articles, and full text monograph.    http://www.wright.edu/~robert.ping/research1.htm

» Maydeu-Olivares, Albert    Albert Maydeu-Olivares' homepage at the University of Barcelona: includes some unpublished working papers.    http://www.ub.es/personal/amaydeu/amaydeuen.html

» Multidimensional Scaling    Searchable bibliography and selection of recent papers, from the University of Newcastle.    http://www.ncl.ac.uk/mds/

» 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, and SAS examples covering topics such as regression, ANOVA, and factor ana    http://www.psych.yorku.ca/lab/psy6140/

» Mx    Matrix algebra interpreter and numerical optimizer for structural equation modeling and other types of statistical modeling of data. Includes documentation and example code.    http://www.vcu.edu/mx/

» 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 features.    http://userpage.fu-berlin.de/~satow/psysoft.htm

» Principal Components and Factor Analysis    Chapter from StatSoft's Electronic Statistics Textbook.    http://www.statsoft.com/textbook/stfacan.html

» Promoting Stakeholder Acceptance of Computer-Based Testing    Jones (2000) article on communicating the value of and addressing issues regarding the implementation of computer-based testing.    http://www.testpublishers.org/journal02.htm

» 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 Portuguese.    http://www.uv.es/psicometria

» Psychometrika    Print journal of the Psychometric Society. Subscription and submission information and author instructions.    http://www.psychometrika.org/

» RepGrid    Includes the Centre for Person-Computer Studies, Knowledge Support Systems, RepGrid and WebGrid software details, and the Personal Construct Psychology site. Many full-text articles for download.    http://www.repgrid.com/

» 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 TESTFACT for IRT-based test analysis.    http://www.ssicentral.com/

» Structural Equation Modeling FAQ    Frequently asked questions for the SEMNET structural equation modeling discussion group.    http://www.gsu.edu/~mkteer/semfaq.html

» The Correlation Coefficient    Online textbook by political scientist RJ Rummel.    http://www.mega.nu:8080/ampp/rummel/uc.htm

» The Reliability of Measuring Instruments    Offers Tom Knapp's book on reliability of measurement.    http://www.educ.ubc.ca/faculty/zumbo/series/knapp/index.htm

» Understanding Factor Analysis    Online textbook providing overview of factor analysis, by political scientist RJ Rummel.    http://www.hawaii.edu/powerkills/UFA.HTM

» 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.    http://www.winsteps.com/

» Young, Forrest W.    Emiritus Professor of Quantitative Psychology at the University of North Carolina, Chapel Hill. Includes links to the VISta data visualization software, and plenty of resources for ALSCAL multidimensional scaling, including FORTRAN source code.    http://forrest.psych.unc.edu/

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