Table 2. Mean (± SEM) Number of Times Infants and Adults Engaged in Rearing and Grooming.

Environment	Rearing		Grooming
	Infants	Adults	Infants	Adults
Novel cage
First quartile	34a,c ± 5	21d ± 3	7a ± 0.7	4d ± 0.6
Third quartile	58a ± 6	83e ± 8	11 ± 1.0	11e ± 0.7
Familiar cage
First quartile	74a ± 9	21 ± 4	10a ± 1.0	3d ± 0.4
Third quartile	58a ± 9	32 ± 3	9 ± 1.0	7 ± 1.0

^aSignificantly different from adults.

^cSignificantly different from infants in the alternate test condition when tested at the same time of day.

^dSignificantly different from adults in the same test condition at the alternate test time.

^eSignificantly different from adults in the alternate test condition when tested at the same time of day.