Table 2.

List of the 37 models available in ChaRTr along with the individual parameters in each model and the total number of parameters. n refers to the number of stimulus conditions used. a_U is the short form of a_upper.

Abbreviation	Parameters	N
Diffusion decision model (DDM)
References: Ratcliff (1978), Ratcliff and Rouder (1998),Ratcliff, 1978,Ratcliff (1978), Ratcliff and Rouder (1998)
DDM	v1...n, aU, Ter	n + 2
DDMSv	v1...n, aU, Ter, Sv	n + 3
DDMSt	v1...n, aU, Ter, St	n + 3
DDMSvSz	v1...n, aU, Ter, Sv, Sz	n + 4
DDMSvSt	v1...n, aU, Ter, Sv, St	n + 4
DDMSvSzSt	v1...n, aU, Ter, Sv, Sz, St	n + 5
Collapsing diffusion decision model (cDDM)
References: Drugowitsch et al. (2012), Hawkins et al. (2015b),Drugowitsch et al., 2012,Drugowitsch et al. (2012), Hawkins et al. (2015b)
cDDM	v1...n, aU, Ter, a′, k	n + 4
cDDMSv	v1...n, aU, Ter, a′, k, Sv	n + 5
cDDMSt	v1...n, aU, Ter, a′, k, St	n + 5
cDDMSvSz	v1...n, aU, Ter, a′, k, Sv, Sz	n + 6
cDDMSvSt	v1...n, aU, Ter, a′, k, Sv, St	n + 6
cDDMSvSzSt	v1...n, aU, Ter, a′, k, Sv, Sz, St	n + 7
Collapsing diffusion decision model with fixed k (cfkDDM)
References: Hawkins et al. (2015b)
cfkDDM	v1...n, aU, Ter, a′	n + 3
cfkDDMSv	v1...n, aU, Ter, a′, Sv	n + 4
cfkDDMSt	v1...n, aU, Ter, a′, St	n + 4
cfkDDMSvSt	v1...n, aU, Ter, a′, Sv, St	n + 5
cfkDDMSvSzSt	v1...n, aU, Ter, a′, Sv, Sz, St	n + 6
Linear urgency diffusion decision model (uDDM)
References: Ditterich (2006a), O’Connell et al. (2018b)
uDDM	v1...n, aU, Ter, b, m	n + 4
uDDMSv	v1...n, aU, Ter, b, m, Sv	n + 5
uDDMSt	v1...n, aU, Ter, b, m, St	n + 5
uDDMSvSt	v1...n, aU, Ter, b, m, Sv, St	n + 6
uDDMSvSb	v1...n, aU, Ter, b, m, Sv, Sb	n + 6
uDDMSvSbSt	v1...n, aU, Ter, b, m, Sv, Sb, St	n + 7
Ditterich urgency diffusion decision model (dDDM)
References: Ditterich (2006a)
dDDM	v1...n, aU, Ter, sx, sy, d	n + 5
dDDMSv	v1...n, aU, Ter, sx, sy, d, Sv	n + 6
dDDMSt	v1...n, aU, Ter, sx, sy, d, St	n + 6
dDDMSvSt	v1...n, aU, Ter, sx, sy, d, Sv, St	n + 7
dDDMSvSzSt	v1...n, aU, Ter, sx, sy, d, Sv, Sz, St	n + 8
Urgency gating model (UGM)
References: Cisek et al. (2009), Thura et al. (2012),Cisek et al., 2009,Cisek et al. (2009), Thura et al. (2012)
UGM	v1...n, aU, Ter	n + 2
UGMSv	v1...n, aU, Ter, Sv	n + 3
UGMSt	v1...n, aU, Ter, St	n + 3
UGMSvSt	v1...n, aU, Ter, Sv, St	n + 4
Urgency gating model with intercept (bUGM)
(Chandrasekaran et al., 2017)
bUGM	v1...n, aU, Ter, b	n + 3
bUGMSv	v1...n, aU, Ter, b, Sv	n + 4
bUGMSvSt	v1...n, aU, Ter, b, Sv, St	n + 5
bUGMSvSb	v1...n, aU, Ter, b, Sv, Sb	n + 5
bUGMSvSbSt	v1...n, aU, Ter, b, Sv, Sb, St	n + 6