Table 2.

Factor loadings of individual behaviors within the EFA

Behavior	Proportional loading onto anxiety factor
Average height	0.816
Bobs	0.769
Time spent at back	0.688
Tse egg calls	0.417
Egg calls	0.332
Tsik egg calls	0.323
Tsik calls	−0.091
Locomotion	−0.568
Time spent at front	−0.790

The pattern in which these individual behaviors load onto this EFA factor suggests that it represents the marmosets' anxiety toward the intruder, with a high factor score representing an animal high up and at the back of cage far away from the intruder, remaining relatively still, and performing a lot of head bobs, indicative of high anxiety.