Table 1.

Estimated drift diffusion model parameters per experimental condition.

	Decision threshold		Non-decision time		Drift rate
	Mean	CI	Mean	CI	Mean	CI
Slow decision (intercept)	3.17	3.02	0.73	0.65	0.97	0.90
		3.34		0.82		1.04
Fast decision (difference)	− 1.04	− 1.22	− 0.35	− 0.44	− 0.42	− 0.49
		− 0.85		− 0.25		− 0.34
Slow tapping (intercept)	2.87	2.73	0.80	0.72	0.91	0.85
		3.01		0.89
Fast tapping (difference)	− 0.11	− 0.21	− 0.05	− 0.11		0.98
		− 0.01		0.01

Parameter values are based on group posteriors of the best-fitting drift diffusion models of each session. Credible intervals (CI) cover 2.5% and 97.5% percentiles of the respective posterior distribution. To estimate within-subject effects, an intercept was fitted to the slow condition and the difference thereof was fitted to the fast condition of the respective session. For the movement session, only one drift rate was fitted for both experimental conditions, as this provided better model fit than the full model (see Table S1).