Table 1

Priors of free parameters in tested models

Parameter	Description	Prior
ω	Bias	IL(0, 1.4)
t_0,_c	Nondecision time of choice	IL(0, 1.4)
v0,vs,vd	Drift rate coefficients of choice	LN(1.56, 1.5)
ρt∗	Mean drift rate of timer	LN(1.56, 1.5)
ηc,ηt∗	Within-trial variability	LN(1.56, 1.5)
γ ^*	Mixture between random and evidence-based timer-induced decision	IL(–1, 1.0)

^IL inverse logit distribution.
^LN log normal distribution.
↵* parameters only exist in TRDM.
The best fitting parameters of the two models for each animal are shown in Extended Data Tables 1-2 and 1-3. We also tested the relationship between RT and contrast difference using nonmodel statistics described in Extended Data Table 1-1.