[R-sig-ME] Post hoc on glmer for specific hypotheses

[Timothy MacKenzie]

Hello All,

My glmer model below analyzes the performance of a single group of
subjects on a test at two time points. The test has 4 item types.

Data and code are below.

Is there a way to test only the following two hypotheses?

1- ((Baseline multiple-choice_grammar) - (Post-test
multiple-choice_grammar)) - (Baseline production_grammar - (Post-test
production_grammar))

2- ((Baseline multiple-choice_vocabulary) - (Post-test
multiple-choice_vocabulary)) - (Baseline production_vocabulary -
(Post-test production_vocabulary))

dat <- read.csv("https://raw.githubusercontent.com/fpqq/w/main/d.csv")

form2 <- y ~ item_type*time + (1 | user_id)

m2 <- glmer(form2, family = binomial, data = dat,
            control =
              glmerControl(optimizer = "bobyqa"))

Sincerely,
Tim M