Table 2.

Kendall's coefficient of concordance for principal components and individual behavioural terms used by observers in the pilot (n = 7 veterinary students) and main study (n = 22; 12 veterinary- and 10 veterinary nurse students) to assess shelter dogs in 12 video clips.

Variable	W for all students in main study	W for vet. students	W for vet. nurse students	W for pilot study
PC1	0.88	0.89	0.88	0.89
PC2	0.79	0.81	0.79	0.78
Content	0.54	0.53	0.58	0.64
Uncomfortable	0.53	0.52	0.59	0.68
Playful	0.61	0.66	0.59	0.50
Depressed	0.70	0.72	0.70	0.65
Relaxed	0.60	0.62	0.62	0.70
Restless	0.69	0.74	0.67	0.71
Alert	0.72	0.70	0.76	0.58
Bored	0.43	0.39	0.53	0.28
Sociable	0.71	0.75	0.67	0.83
Nervous	0.56	0.57	0.57	0.49
Expectant	0.72	0.77	0.70	0.78
Hesitant	0.46	0.43	0.54	0.33
Trustful	0.59	0.61	0.59	0.71
Aggressive	0.29	0.33	0.29	0.36
Energetic	0.66	0.66	0.68	0.75
Frustrated	0.50	0.58	0.45	0.67
Curious	0.64	0.72	0.56	0.75
Calming	0.33	0.31	0.41	0.40
Indifferent	0.57	0.65	0.53	0.57
Stressed	0.58	0.63	0.57	0.75