Table 1.

Information concerning the models compared on the basis of their fit to the choices of 29 participants.

Model	Basic model	Forgetting	Default value	Free parameters	#	–LL	AIC
SARSA (λ) TD	Model-free	–	–	αL, β, π, ρ, λ	5	4,661	9,612
P	Parallel	–	–	αL, β, π, ρ, w, λ	6	3,435	7,219
P-F0	Parallel	o	Fixed (μ = 0)	αL, β, π, ρ, w, λ, αF	7	3,284	6,974
P-F05	Parallel	o	Fixed (μ = 0.5)	αL, β, π, ρ, w, λ, αF	7	3,048	6,503
P-FD	Parallel	o	o	αL, β, π, ρ, w, λ, αF, μ	8	3,024	6,511
LA	Learning-rate adjustment	–	–	αL, β, π, ρ, w	5	3,447	7,184
LA-F0	Learning-rate adjustment	o	Fixed (μ = 0)	αL, β, π, ρ, w, αF	6	3,292	6,931
LA-F05	Learning-rate adjustment	o	Fixed (μ = 0.5)	αL, β, π, ρ, w, αF	6	3,055	6,457
LA-FD	Learning-rate adjustment	o	o	αL, β, π, ρ, w, αF, μ	7	3,032	6,469

This list provides information for the free parameters, negative log likelihood (–LL) and Akaike information criterion (AIC) summed over all participants (n = 29) for each model. The models differ regarding the basic model with parallel (P) or parsimonious learning-rate adjustment (LA). The models also differ regarding their forgetting-process assumptions: no forgetting, forgetting with a fixed default value (F0 or F05), or forgetting with a free default value parameter (FD).