Dual-Objective Item Selection Criteria in Cognitive Diagnostic Computerized Adaptive Testing

Hyeon Ah Kang, Susu Zhang, Hua Hua Chang

Research output: Contribution to journalArticlepeer-review

Abstract

The development of cognitive diagnostic-computerized adaptive testing (CD-CAT) has provided a new perspective for gaining information about examinees' mastery on a set of cognitive attributes. This study proposes a new item selection method within the framework of dual-objective CD-CAT that simultaneously addresses examinees' attribute mastery status and overall test performance. The new procedure is based on the Jensen-Shannon (JS) divergence, a symmetrized version of the Kullback-Leibler divergence. We show that the JS divergence resolves the noncomparability problem of the dual information index and has close relationships with Shannon entropy, mutual information, and Fisher information. The performance of the JS divergence is evaluated in simulation studies in comparison with the methods available in the literature. Results suggest that the JS divergence achieves parallel or more precise recovery of latent trait variables compared to the existing methods and maintains practical advantages in computation and item pool usage.

Original languageEnglish (US)
Pages (from-to)165-183
Number of pages19
JournalJournal of Educational Measurement
Volume54
Issue number2
DOIs
StatePublished - Jun 1 2017

ASJC Scopus subject areas

  • Education
  • Developmental and Educational Psychology
  • Applied Psychology
  • Psychology (miscellaneous)

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