Table 1.

Schedule of picture assignment probability and the participants’ choice preferences for each block.

Trial	Target 1	Target 2	No. of participants choosing target 1	No. of participants choosing target 2	Preference across participants
	Neut:Pos:Neg	Neut:Pos:Neg	(p < 0.05)	(p < 0.05)
1–50	0.7:0.2:0.1	0.7:0.1:0.2	5	0	1**
51–130	0.1:0.0:0.9	0.1:0.9:0.0	0	17	2**
131–210	0.1:0.7:0.2	0.2:0.7:0.1	0	15	2**
211–330	0.2:0.4:0.4	1.0:0.0:0.0	7	10	2**
331–420	0.2:0.0:0.8	0.0:0.2:0.8	6	10	n.s.
421–480	0.0:1.0:0.0	1.0:0.0:0.0	9	1	1**
481–600	0.7:0.1:0.2	0.7:0.2:0.1	6	11	n.s.

Each row represents one block. From the left column: trial range for each block, the probabilities for picture category for target 1 (second column) and target 2 (third column), the number of participants showing a significant preference to target 1 (fourth column) and target 2 (fifth column) over 17 participants, and the preferred target across all participants. Neut: neutral, Pos: positive, and Neg: negative pictures. **p < 0.01.