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Regions of Significant Criterion Differences in Aptitude Treatment Interaction Research NICHD

Author(s):
Cahen, Leonard S.; Linn, Robert L.
Publication Year:
1970
Report Number:
RB-70-46
Source:
ETS Research Bulletin
Document Type:
Report
Page Count:
17
Subject/Key Words:
National Institute for Child Health and Human Development (NICHD), Educational Research, Individual Differences, Interaction Process Analysis, Learning Processes, Statistical Analysis

Abstract

Three techniques (Johnson-Heyman, Potthoff, & Erlander & Gustavsson) for obtaining confidence regions for the difference between regression surfaces are compared. The techniques are potentially useful for analyzing data from aptitude-treatment-interaction research (ATI). The three techniques are found to yield substantially different sized confidence regions when applied to the same data, therefore possibly leading to different decisions in an aptitude treatment study.

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