lm_slopes_compare: Compare the slopes of two lme models

In EMAtools: Data Management Tools for Real-Time Monitoring/Ecological Momentary Assessment Data

Compare the slopes of two lme models

Description

This allows you to compare two lme4 models that have the same fixed predictors but differ in other ways (e.g., from different datasets, different random effects). It will produce a Z score a p-value for each effect.

Usage

lm_slopes_compare(VAR1, VAR2)

Arguments

VAR1	An lme4 object
VAR2	An lme4 object that has the same variables, in the same order as VAR1.

Value

Z-tests comapring slopes.

Examples

data(sleepstudy, package = "lme4")
model1 <- lmerTest::lmer(Reaction ~ Days + (1 | Subject), data = sleepstudy)
model2 <- lmerTest::lmer(Reaction ~ Days + (1 | Subject),
                         data = sleepstudy[sleepstudy$Days < 8, ])
lm_slopes_compare(model1, model2)

EMAtools documentation built on June 22, 2026, 5:08 p.m.