Table 1:

Sex and group sizes, as well as learning success of each animal, at 3 and 9 months old

Animal ID	Sex	Family size at 3 months	Family size at 9 months	Learned task at 3 months	Learned task at 9 months
cj1	F	3	3	Yes	No
cj2	M	4	4	Yes	Yes
cj3	F	4	4	Yes	Yes
cj4	M	4	4	Yes	Yes
cj5	M	9	8	No	(no learning data)
cj6	M	9	8	No	No
cj7	F	9	*	Yes	*
cj8	M	6	6	Yes	No
cj9	F	6	6	Yes	Yes
cj10	F	4	4	Yes	No
cj11	M	4	4	Yes	No
cj12	M	5	*	Yes	*
cj13	F	4	*	Yes	*
cj14	F	4	*	Yes	*
cj15	F	6	6	Yes	No
cj16	M	6	6	Yes	No
cj17	M	4	4	Yes	(no learning data)
cj18	F	4	4	Yes	(no learning data)
cj19	F	6	5	Yes	No
cj20	M	6	5	Yes	No
cj21	F	6	5	Yes	Yes
cj22	M	6	5	Yes	Yes

^*dropped from study at 8 months

No learning data- did not reach criterion touching s+