, Volume 29, Issue 2, pp 207–209 | Cite as

Comment on feldt's “use of extreme groups”

  • John Ross
  • James Lumsden


Maximum Likelihood Estimator Variance Function Likelihood Estimator Criterion Group Western AUSTRALIA 


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  1. [1]
    Feldt, L. S. Note on use of extreme criterion groups in item discrimination analysis.Psychometrika, 1963,28, 97–104.CrossRefGoogle Scholar
  2. [2]
    Mosteller, F. On some useful “inefficient” statistics.Ann. math. Statist., 1946,17, 377–408.CrossRefGoogle Scholar
  3. [3]
    Peters, C. L. and Van Voorhis, W. R.Statistical procedures and their mathematical bases. New York: McGraw-Hill, 1940.CrossRefGoogle Scholar
  4. [4]
    Ross, J. and Weitzman, R. A. The twenty-seven per cent rule.Ann. math. Statist., 1964,35, 214–221.CrossRefGoogle Scholar

Copyright information

© Psychometric Society 1964

Authors and Affiliations

  • John Ross
    • 1
  • James Lumsden
    • 1
  1. 1.University of Western AustraliaAustralia

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