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A Note on the Normal Ogive or Logistic Curve

Author(s):
Lord, Frederic M.
Publication Year:
1964
Report Number:
RB-64-56
Source:
ETS Research Bulletin
Document Type:
Report
Page Count:
3
Subject/Key Words:
Item Analysis, Mathematical Models, Normal Ogive Model, Test Theory

Abstract

The relation of proportion of correct answers on an item to total test score is typically not a normal ogive or logistic curve.

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