Table 1.

Summary of thumb placement (in per cent of trials) as a function of experimental condition.

thumb placement	conditions
	control	baited-left	baited-right
Brandy
left	10	5	15
right	90	95	85
Jadinea
left	75	95	78
right	25	5	22
Candyb
left	89	79	87
right	11	21	13
Kara
left	100	100	95
right	0	0	5
Meganc
left	90	100	84
right	10	0	16

^aOne trial was inadvertently not recorded.

^bAn experimental error resulted in the administration of 18 control trials and 19 baited left and 23 trials baited right test trials.

^cOne trial was not codable owing to the obstruction of the stimuli by the subject's body.