Table 1.

Overview procedure for behavioral training

	Lever-press training (shaping) ➨ Discrimination ➨ Reversal
Stimuli	Randomly 1 lever + cue light		Both levers + cue lights; spatial contingency	Both levers + cue lights; contingency switch after 16-32 trials
Trials	32	64	120	120
ITI	10/20 sec	10/20 sec	15/25/35/45 sec	15/25/35/45 sec
Sessions	Until criterion	1	2*	1
Criterion for next stage	>90% response	>90% response	>90% correct responses	>90% correct responses

^*additional session (max 64 tr) if criterion not reached