, Volume 41, Issue 2, pp 219–231

A k-sample significance test for independent alpha coefficients

  • A. Ralph Hakstian
  • Thomas E. Whalen

DOI: 10.1007/BF02291840

Cite this article as:
Hakstian, A.R. & Whalen, T.E. Psychometrika (1976) 41: 219. doi:10.1007/BF02291840


The earlier two-sample procedure of Feldt [1969] for comparing independent alpha reliability coefficients is extended to the case ofK ≥ 2 independent samples. Details of a normalization of the statistic under consideration are presented, leading to computational procedures for the overallK-group significance test and accompanying multiple comparisons. Results based on computer simulation methods are presented, demonstrating that the procedures control Type I error adequately. The results of a power comparison of the case ofK=2 with Feldt's [1969]F test are also presented. The differences in power were negligible. Some final observations, along with suggestions for further research, are noted.

Key words

reliability internal consistency comparison of reliability coefficients 

Copyright information

© Psychometric Society 1976

Authors and Affiliations

  • A. Ralph Hakstian
    • 1
  • Thomas E. Whalen
    • 1
  1. 1.Department of PsychologyUniversity of British ColumbiaVancouverCanada

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