How to capitalize on a priori contrasts in linear (mixed) models: A tutorial

• Published in: Journal of memory and language Vol. 110; p. 104038
• Main Authors: Schad, Daniel J., Vasishth, Shravan, Hohenstein, Sven, Kliegl, Reinhold
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.02.2020
• Subjects: A priori hypotheses; Contrasts; Linear models; Null hypothesis significance testing; A priori hypotheses; Linear models; Contrasts; Null hypothesis significance testing

•Tutorial on contrast coding in R.•Discussion of treatment, sum, repeated, polynomial, and custom contrasts.•Interactions between contrasts and ANOVA.•Explains how to generate contrast matrices from hypotheses.•Introduces the hypothesis matrix and the generalized inverse. Factorial experiments in re...