Table 2.

Standardized, varimax-rotated factor loadings of social behaviors in principal components analysis (PCA).

Category	Behavior	PC1	PC2	PC3
		(Social Approachability)	(Boldness)	(Anxiousness)
Dominance	Aggression (F)	−0.01	0.72	−0.17
	Submissive Gestures (F)	−0.16	−0.70	0.26
Anxiety	Self-Scratching Bouts (F)	0.13	0.03	0.79
	Self-Grooming (D)	−0.13	−0.05	0.49
Affiliation	Alone (D)	−0.81	−0.47	0.05
	Approaches Given (F)	0.40	0.51	0.21
	Approaches Received (F)	0.78	−0.18	0.05
	Contact (D)	0.71	0.09	−0.25
	Grooming Received (D)	0.58	0.40	0.14
	Grooming Given (D)	0.05	0.75	0.33
	Eigenvalue	3.19 (2.71, 3.82)	1.40 (1.34, 1.87)	1.20 (1.10, 1.48)
	Cumulative% Variance	32	46	58

Bold typeface indicates the strongest factor loadings (|r| >0.50).

Eigenvalues with confidence intervals are shown, calculated from a bootstrapped distribution (k = 10,000).

D: duration (min/h); F: frequency (events/h).