Comparison of "joint moderators" in three prediction techniques

Abstract

Examined the existence of 2 potential "joint moderator" variables (anxiety and study habits), and compared their operation according to 3 different prediction techniques: (a) subgroup analysis, (b) differential prediction of predictability, and (c) moderated regression. Results with 393 undergraduates indicate that anxiety moderated the relationship between GPA and American College Test scores using subgroup analysis and differential predictability techniques. A comparison of moderated regression with linear regression indicated that study habits operated as an independent predictor. None of the techniques identified joint moderators in this situation. Results are discussed in the light of problems and assumptions of each technique. The need for systematic identification of moderators from a large mass of data is indicated. (17 ref.) (PsycInfo Database Record (c) 2025 APA, all rights reserved)