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. 2015 Sep 27;78(2):231–238. doi: 10.1292/jvms.15-0253

Table 3. Factor loading of questionnaire items constituting each factor.

Factors & questionnaire items Factor loading Eigenvalue Contribution ratio Cronbach’s α
Aggression to unfamiliar persons 9.367 9.798 0.918
When approached directly by an unfamiliar adult while being walked or exercised on a leash 0.837
When an unfamiliar person tries to touch or pet the dog 0.803
When an unfamiliar person approaches the owner or a member of the owner’s family away from home 0.788
When approached directly by an unfamiliar child while being walked or exercised on a leash 0.752
Toward unfamiliar persons visiting the home 0.713
When an unfamiliar person approaches the owner or a member of the owner’s family at home 0.664
When mailmen or other delivery workers approach the home 0.599
Fear of unfamiliar persons 4.218 5.375 0.900
When approached directly by an unfamiliar male adult while away from the home 0.823
When an unfamiliar person tries to touch or pet the dog 0.770
When approached directly by an unfamiliar child while away from the home 0.752
When unfamiliar persons visit the home 0.693
Separation-related behavior 3.838 5.055 0.804
Barking when left or about to be left on its owner 0.736
Whining when left or about to be left on its owner 0.711
Howling when left or about to be left on its owner 0.616
Excessive salivation when left or about to be left on its owner 0.490
Chewing/scratching at doors, floor, windows, curtains, etc. 0.476
Loss of appetite when left or about to be left on its owner 0.405
Aggression to members of the household (especially related to possession) 3.314 5.009 0.723
When food is taken away by a member of the household 0.831
When approached directly by a member of the household while it is eating 0.772
When a member of the household retrieves food or objects stolen by the dog 0.689
When toys, bones or other objects are taken away by a member of the household 0.642
When verbally corrected or punished by a member of the household 0.401
Energy and restless 2.275 4.861 0.841
Playful, puppyish, boisterous 0.709
When a member of the household returns home after a brief absence 0.685
Active, energetic, always on the go 0.526
When visitors arrive at its home 0.489
Restlessness, agitation or pacing when left or about to be left on its owner 0.462
Fear of non-social stimuli 2.142 4.432 0.758
In response to wind or wind-blown objects 0.699
In response to strange or unfamiliar objects on or near the sidewalk 0.677
In response to sudden or loud noises 0.664
When first exposed to unfamiliar situations 0.478
During thunderstorms 0.427
Fear of unfamiliar dogs 1.887 4.114 0.883
When approached directly by an unfamiliar dog of the same or larger size 0.810
When barked, growled or lunged at by unfamiliar dog 0.759
When approached directly by an unfamiliar dog of a smaller size 0.755
Trainability 1.734 4.028 0.800
Obeys a stay command immediately 0.769
Obeys a sit command immediately 0.731
Seems to attend to or listen closely to everything the owner says or does 0.622
Returns immediately when called while off leash 0.609
Aggression to unfamiliar dogs 1.537 4.026 0.897
When approached directly by an unfamiliar male dog while being walked or exercised on a leash 0.853
When approached directly by an unfamiliar female dog while being walked or exercised on a leash 0.841
When barked, growled or lunged at by unfamiliar dog 0.641
Excitability 1.370 3.443 0.678
Just before being taken on a car trip 0.680
Just before being taken on a walk 0.640
When playing with you or other familiy member of your house 0.433
Displays a strong attachment for one particular member of the household 0.422
Attachment and attention-seeking 1.255 3.368 0.705
Tends to nudge, nuzzle or paw a member of the household for attention when that individual is sitting down 0.710
Tends to sit close to or in contact with a member of the household when that individual is sitting down 0.656
Tends to follow a member of household from room to room about the house 0.532
Becomes agitated when a member of the household shows affection for another person 0.473
Aggression to persons passing near the house 1.016 2.239 0.877
When strangers walk past the home while the dog is in the yard 0.662
When joggers, cyclists, roller skaters or skateboarders pass the home while the dog is in the yard 0.599