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Estimation of Measurement Error Variance at Specific Score Levels
Author(s) -
Feldt Leonard S.,
Quails Audrey L.
Publication year - 1996
Publication title -
journal of educational measurement
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.917
H-Index - 47
eISSN - 1745-3984
pISSN - 0022-0655
DOI - 10.1111/j.1745-3984.1996.tb00486.x
Subject(s) - statistics , variance (accounting) , raw score , observational error , test (biology) , mathematics , one way analysis of variance , econometrics , variance components , analysis of variance , scale (ratio) , raw data , paleontology , accounting , business , biology , physics , quantum mechanics
An improved method is derived for estimating conditional measurement error variances, that is, error variances specific to individual examinees or specific to each point on the raw score scale of the test. The method involves partitioning the test into short parallel parts, computing for each examinee the unbiased estimate of the variance of part‐test scores, and multiplying this variance by a constant dictated by classical test theory. Empirical data are used to corroborate the principal theoretical deductions.