Figure 5.

Conditional inference tree on second principal component: cat's fearfulness/aggression. each node represents a dichotomous split based on a demographic factor that distinguishes between lower-responding and higher-responding observations for the second principal component. Node 1 shows that female cats generally scored higher than male cats on fearfulness/aggression. Node 2 shows that having more than 2 adults in the home was associated with lower fearfulness/aggression. The most elevated scores for the factor of fearfulness/aggression were for female cats (node 1) living with up to 2 adults (node 2), living with at least one child 9–12 (node 3), adopted as a kitten (node 5), and living with a dog (node 6). Statistical tests are noted at each node.