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Direct linkRanger, Jochen; Kuhn, Jörg Tobias; Ortner, Tuulia M. – Educational and Psychological Measurement, 2020
The hierarchical model of van der Linden is the most popular model for responses and response times in tests. It is composed of two separate submodels--one for the responses and one for the response times--that are joined at a higher level. The submodel for the response times is based on the lognormal distribution. The lognormal distribution is a…
Descriptors: Reaction Time, Tests, Statistical Distributions, Models
Sinharay, Sandip – Journal of Educational Measurement, 2018
Response-time models are of increasing interest in educational and psychological testing. This article focuses on the lognormal model for response times, which is one of the most popular response-time models, and suggests a simple person-fit statistic for the model. The distribution of the statistic under the null hypothesis of no misfit is proved…
Descriptors: Reaction Time, Educational Testing, Psychological Testing, Models
Download full textSinharay, Sandip – Grantee Submission, 2018
Response-time models are of increasing interest in educational and psychological testing. This paper focuses on the lognormal model for response times (van der Linden, 2006), which is one of the most popular response-time models, and suggests a simple person-fit statistic for the model. The distribution of the statistic under the null hypothesis…
Descriptors: Reaction Time, Educational Testing, Psychological Testing, Models
Center for Collegiate Mental Health, 2012
This report summarizes the "first academic year of data (2010- 2011) pooled through a new international data infrastructure. When reading this report, please keep the following points in mind: (1) This data set describes college students seeking treatment in 97 counseling centers; (2) For a comparative data-set on the general college student…
Descriptors: Annual Reports, Mental Health, Mental Health Programs, Statistical Data
Peer reviewedBalakrishnan, J. D. – Psychometrika, 1994
Methods of testing relatively complete (distributional) models of internal psychological processes are described. It is shown that there is a sufficient condition for additive models to imply this property of the likelihood ratio. Also discussed are the examination of hazard rate functions of component processes and change in cumulative…
Descriptors: Behavioral Science Research, Change, Equations (Mathematics), Measures (Individuals)
Peer reviewedBedrick, Edward J. – Psychometrika, 1990
Asymptotic distributions of H. Brogden's and F. Lord's modified sample biserial correlation coefficients (SBCCs) are derived. Asymptotic variances of these estimators are evaluated for bivariate normal populations and compared to the maximum likelihood estimator's asymptotic variance. These estimators are less variable than ordinary SBCCs when the…
Descriptors: Correlation, Equations (Mathematics), Estimation (Mathematics), Mathematical Models
