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Intelligence and Ability Tests 44
Personality Tests 97
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Research Methods - Psychology, Social Sciences, Science 62
 Paul BarrettPaul Barrett
 
Free software for (advanced) psychometric analyses. Also a number of presentations on psychometrics.
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Applied Psychometric SocietyApplied Psychometric Society
 Resource for professionals in psychometrics. Operated by Fordham University.
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Article: Increasing the Validity of Adapted TestsArticle: 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.
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Bayesian Factor AnalysisBayesian Factor Analysis
 Describes the Bayesian approach to factor analysis, which incorporates prior information and eliminates the need for rotation. Includes some full-text articles.
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The Correlation CoefficientThe Correlation Coefficient
 Online textbook by political scientist RJ Rummel.
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Factor AnalysisFactor Analysis
 Introduction to factor analysis, with worked examples.
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Ingrid Yahoo GroupIngrid Yahoo Group
 Free downloadable software for analysing repertory grids.
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Institute for Objective MeasurementInstitute for Objective Measurement
 Rasch Scaling information from MESA at the University of Chicago. Includes full text articles.
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Item Response TheoryItem Response Theory
 This website by Lawrence Rudner introduces Item Response Theory, and includes a complete on-line book.
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Latent Class Analysis and Latent Class ModelsLatent 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.
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Latent Variable Interactions and QuadraticsLatent 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.
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L-BFGS-B Nonlinear Optimization CodeL-BFGS-B Nonlinear Optimization Code
 Bounded optimisation code (FORTRAN) for numerical analysis, from Northwestern University.
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Maydeu-Olivares, AlbertMaydeu-Olivares, Albert
 Albert Maydeu-Olivares' homepage at the University of Barcelona: includes some unpublished working papers.
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Multidimensional ScalingMultidimensional Scaling
 Searchable bibliography and selection of recent papers, from the University of Newcastle.
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Multivariate Data AnalysisMultivariate 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 analysis.
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MxMx
 Matrix algebra interpreter and numerical optimizer for structural equation modeling and other types of statistical modeling of data. Includes documentation and example code.
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PMetric Psychometric Software SystemPMetric 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.
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Principal Components and Factor AnalysisPrincipal Components and Factor Analysis
 Chapter from StatSoft's Electronic Statistics Textbook.
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Promoting Stakeholder Acceptance of Computer-Based TestingPromoting Stakeholder Acceptance of Computer-Based Testing
 Jones (2000) article on communicating the value of and addressing issues regarding the implementation of computer-based testing.
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Psychometrics Research UnitPsychometrics 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.
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PsychometrikaPsychometrika
 Print journal of the Psychometric Society. Subscription and submission information and author instructions.
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The Reliability of Measuring InstrumentsThe Reliability of Measuring Instruments
 Offers Tom Knapp's book on reliability of measurement.
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RepGridRepGrid
 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.
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Scientific Software InternationalScientific 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.
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Structural Equation Modeling FAQStructural Equation Modeling FAQ
 Frequently asked questions for the SEMNET structural equation modeling discussion group.
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Understanding Factor AnalysisUnderstanding Factor Analysis
 Online textbook providing overview of factor analysis, by political scientist RJ Rummel.
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Winsteps and Facets Rasch Analysis SoftwareWinsteps 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.
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Young, Forrest W.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.
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