Table 2.

Rotated factor loadings of the first and second factors obtained in the EFA with Varimax rotation, the proportion of variance explained for each factor and the reliability coefficient Cronbach’s alpha for each factor.

Items	Factor		Original PANAS
	1	2
1-Your dog is rarely frightened	0.668	−0.039	Negative activation
3-Your dog is easily startled by noises and/or movements	0.738	0.013	Negative activation
6-Your dog appears nervous and/or jumpy for several minutes after it has been startled	0.630	−0.007	Negative activation
8-Your dog has a specific fear or phobia	0.595	−0.098	Negative activation
10-Your dog appears calm in noisy, crowded places	0.663	0.096	Negative activation
15-Your dog adapts quickly to changes in its environment (e.g. being cared for by different people, moving house or a family member leaving home)	0.501	0.004	Negative activation
16-Your dog appears afraid of the vacuum cleaner or any other familiar household appliance	0.530	0.005	Negative activation
19-Your dog appears calm in unfamiliar environments	0.552	0.120	Negative activation
21-Your dog appears unsettled by changes to its routine (e.g. if it is not fed at the usual time, if it is left alone for longer than usual)	0.465	0.222	Negative activation
4-Your dog is very persistent in its efforts to get you to play	0.097	0.655	Positive activation
5-Your dog shows little interest in its surroundings	−0.069	0.408	Positive activation
7-Your dog is easily excited	0.234	0.630	Positive activation
11-Your dog is full of energy	−0.069	0.788	Positive activation
14-Your dog is lazy	−0.103	0.518	Positive activation
18-Your dog persists in being naughty despite being told off for the behaviour	0.120	0.456	Positive activation
20-Your dog is very boisterous	0.063	0.721	Positive activation
Variance	3.48	2.55
% Variance	21.7%	16.0%
Cronbach’s alpha	0.77	0.71