Table 2.

Results of the principal component analysis.

	Principal components
Variable ( test )	Willingness to interact	Preference for social contact	Non-aversive response to non-social threat	Non-aversive response to social threat
Number of valid choices (Directional gesturing—test 6)	0.913	0.051	0.200	0.104
Accept food (Directional gesturing + Food motivation—tests 2 and 6)	0.851	0.164	0.166	−0.036
Number of valid choices (Emotion recognition—test 7)	0.846	0.014	0.049	0.225
Number of eye contacts (Training for eye contact—test 4)	0.695	−0.016	0.227	0.031
Reaction to petting (Interaction with C—test 1)	−0.137	0.905	0.010	0.064
Reaction to petting (Greeting by E—test 3)	0.051	0.890	0.079	0.068
Latency of approach (Interaction with C—test 1)	−0.068	−0.815	0.041	0.046
Latency of approach (Greeting by E—test 3)	−0.260	−0.719	0.061	−0.232
Distance from object (Potentially threatening moving object—test 5)	0.066	−0.087	0.911	0.040
Type of reaction (Potentially threatening moving object—test 5)	0.285	−0.049	0.856	0.105
Latency of sniffing (Potentially threatening moving object—test 5)	−0.329	−0.182	−0.697	−0.245
Type of reaction (Threatening approach—test 8)	0.087	0.170	0.129	0.893
Distance from E (Threatening approach—test 8)	0.118	0.027	0.133	0.891
Eigenvalue	4.282	2.788	1.593	1.308
Explained variance	32.940	21.443	12.252	10.060
Cronbach's α	0.861	0.806	0.816	0.819

Loadings > 0.5 are in boldface.

E, experimenter; C, caretaker.