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ERIC Number: EJ1015250
Record Type: Journal
Publication Date: 2013-Aug
Pages: 37
Abstractor: As Provided
Reference Count: 48
ISBN: N/A
ISSN: ISSN-1076-9986
A Semiparametric Model for Jointly Analyzing Response Times and Accuracy in Computerized Testing
Wang, Chun; Fan, Zhewen; Chang, Hua-Hua; Douglas, Jeffrey A.
Journal of Educational and Behavioral Statistics, v38 n4 p381-417 Aug 2013
The item response times (RTs) collected from computerized testing represent an underutilized type of information about items and examinees. In addition to knowing the examinees' responses to each item, we can investigate the amount of time examinees spend on each item. Current models for RTs mainly focus on parametric models, which have the advantage of conciseness, but may suffer from reduced flexibility to fit real data. We propose a semiparametric approach, specifically, the Cox proportional hazards model with a latent speed covariate to model the RTs, embedded within the hierarchical framework proposed by van der Linden to model the RTs and response accuracy simultaneously. This semiparametric approach combines the flexibility of nonparametric modeling and the brevity and interpretability of the parametric modeling. A Markov chain Monte Carlo method for parameter estimation is given and may be used with sparse data obtained by computerized adaptive testing. Both simulation studies and real data analysis are carried out to demonstrate the applicability of the new model. (Contains 8 figures and 3 tables.)
SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail: journals@sagepub.com; Web site: http://sagepub.com
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A