A Maximum-Likelihood Procedure for Developing a Common Metric in Item-Response Theory

Abstract

Because the ability scale in item-response theory is arbitrary, if two item pools are calibrated in two different samples, their parameter estimates must be placed on a common metric using items administered in both calibrations, In this memorandum, a maximum likelihood procedure for doing so is derived and illustrated. Keywords: ASVAB (Armed Services Vocational Aptitude Battery), CAT (Computerized Adaptive Testing), maximum likelihood estimation, Parameters, Statistical analysis, Statistical processes, Test methods.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1988
Accession Number
ADA208771

Entities

People

  • D. R. Divgi

Organizations

  • Center for Naval Analyses

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Arithmetic
  • Availability
  • Calibration
  • Classification
  • Computer Programs
  • Data Analysis
  • Department Of Defense
  • Education
  • Enlisted Personnel
  • Marine Corps
  • Mathematics
  • Maximum Likelihood Estimation
  • Security
  • Standards
  • Statistical Analysis
  • Training
  • Virginia

Readers

  • Psychometric Testing or Psychological Assessment.
  • Statistical inference.