Table 1.

Target location for each trial (HP, High Probability side; LP, Low-Probability side).

Block	Trial	Deterministic condition		Probabilistic condition
		Target location	P(HP)	Target location	P(HP)
−	1	HP	−	HP	−
1	2	HP	1	LP	1
	3	HP	1	HP	0.5
	4	HP	1	HP	0.67
	5	HP	1	HP	0.75
2	6	HP	1	LP	0.80
	7	HP	1	HP	0.67
	8	HP	1	HP	0.71
	9	LP	1	LP	0.75
3	10	HP	0.89	HP	0.67
	11	HP	0.90	HP	0.70
	12	HP	0.91	HP	0.73
	13	LP	0.92	LP	0.75
4	14	HP	0.85	HP	0.69
	15	HP	0.86	HP	0.71
	16	HP	0.87	HP	0.73
	17	HP	0.88	HP	0.75
5	18	HP	0.88	HP	0.77
	19	HP	0.89	HP	0.78
	20	HP	0.90	HP	0.79
	21	HP	0.90	HP	0.80

P(HP) is the probability of the target appearing on the HP side based all previous trials within that condition.