A Paradox in the Interpretation of Group Comparisons ANCOVA

Author(s):: Lord, Frederic M.
Publication Year:: 1965
Report Number:: RB-65-08
Source:: ETS Research Bulletin
Document Type:: Report
Page Count:: 7
Subject/Key Words:: Analysis of Covariance (ANCOVA), Comparative Analysis, Statistical Bias, Statistical Inference

Abstract

Attention is called to a basic source of confusion in the interpretation of certain types of group comparison data.