Table 1. Chimpanzee search behavior during preliminary training.

	Food Reveal		Empty Reveal
	Redundant Searches	Exploratory Searches	Correct Location Searches	Redundant Searches	Exploratory Searches
Sherman	22	2	9	4	13
Lana	22	0	8	6	12
Mercury	19	2	5	9	13

Note. Redundant searches were those in which the chimpanzee searched the location that had been revealed. In the food reveal condition this was the location that held the food reward, and in the empty reveal condition this was an empty location. Exploratory searches were any searches to containers other than the one that had been revealed. Correct location searches in the empty reveal condition were trials in which the chimpanzees found the food, by chance (20%), on the first search. Sherman (34%), Lana (31%), and Mercury (19%) did not differ from chance in these searches, all p > .05, binomial test.