Predicting the Effect of a Predictor When Controlling for Baseline-Reference-Cited by-同舟云学术

Predicting the Effect of a Predictor When Controlling for Baseline

Published:2019-01-08 Issue:4 Volume:79 Page:688-698
ISSN:0013-1644
Container-title:Educational and Psychological Measurement
language:en
Short-container-title:Educational and Psychological Measurement

Author:

Sorjonen Kimmo¹,Melin Bo¹,Ingre Michael¹²

Affiliation:

1. Karolinska Institutet, Solna, Sweden

2. Institute for Globally Distributed Open Research and Education (IGDORE), Stockholm, Sweden

Abstract

The present simulation study indicates that a method where the regression effect of a predictor (X) on an outcome at follow-up (Y1) is calculated while adjusting for the outcome at baseline (Y0) can give spurious findings, especially when there is a strong correlation between X and Y0 and when the test–retest correlation between Y0 and Y1 is relatively weak. Researchers wishing to avoid spurious findings and Type 1 errors should be aware of this phenomenon and are recommended to verify found effects by an unadjusted effect of X on the Y1–Y0 difference.

Publisher

SAGE Publications

Subject

Applied Mathematics,Applied Psychology,Developmental and Educational Psychology,Education

Link

http://journals.sagepub.com/doi/pdf/10.1177/0013164418822112

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