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.