Table 2. Main test design.

Day	Experimenter	Condition	Session	Number of trials
1	A	Motivational	1	2
	B	Failed-look	1	2
2	A	Motivational	2	2
	C	Successful-look	1	2
3	A	Motivational	3	2
	B	Failed-look	2	2
4	A	Motivational	4	2
	C	Successful-look	2	2