Table A1.

Generalized linear mixed model estimates with random effects: Fixed effects (marginal) R² = 0.101; fixed and random effects (conditional) R² = 0.25.

	β	CI low	CI high	z val	p val	p adj
intercept	1.013	0.812	1.247	8.7	<0.001	<0.001
group	0.326	0.153	0.528	4.1	<0.001	<0.001
voices24	0.541	0.303	0.755	4.2	<0.001	<0.001
voices34	–0.067	–0.249	0.217	–0.5	0.596	0.715
instr	–0.186	–0.248	–0.142	–6.3	<0.001	<0.001
order	–0.110	–0.169	–0.047	–3.8	<0.001	0.001
group:voices24	0.159	0.055	0.253	3.7	<0.001	0.001
group:voices34	0.033	–0.050	0.102	0.8	0.414	0.580
group:instr	–0.076	–0.129	—0.021	-2.6	0.009	0.025
voices24:instr	0.119	0.011	0.208	2.8	0.006	0.017
voices34:instr	–0.050	–0.140	0.047	–1.2	0.221	0.354
group:order	–0.075	–0.129	–0.006	–2.6	0.010	0.025
voices24:order	–0.034	–0.125	0.039	–0.8	0.428	0.580
voices34:order	–0.060	–0.137	0.033	–1.5	0.137	0.245
instr:order	0.043	–0.018	0.107	1.5	0.143	0.245
group:voices24:instr	0.131	0.048	0.213	3.0	0.002	0.008
group:voices34:instr	-0.066	–0.143	0.033	–1.6	0.105	0.218
group:voices24:order	–0.034	-0.135	0.057	–0.8	0.435	0.580
group:voices34:order	0.010	–0.058	0.099	0.2	0.807	0.842
group:instr:order	–0.017	–0.075	0.031	–0.6	0.571	0.715
voices24:instr:order	–0.069	–0.144	0.014	–1.6	0.109	0.218
voices34:instr:order	0.013	–0.053	0.094	0.3	0.758	0.826
group:voices24:instr:order	–0.004	–0.107	0.085	–0.1	0.927	0.927
group:voices34:instr:order	0.015	–0.066	0.095	0.4	0.718	0.821

The rightmost column lists p-values adjusted for multiple comparisons (false discovery rate method). The variable group corresponds to the difference between yNH participants and oHA users. The variables voices24 and voices34 correspond to the contrasts between 2 and 4 voices and 3 and 4 voices, respectively. The variable order corresponds to the session order (1st vs. 2nd).