CANINE ANALOGS OF HUMAN PERSONALITY-FACTORS

Analysis of the behavioral traits of 56 breeds of dog produced three f actors with some similarities to the popular five-factor model of huma n personality: (a) reactivity-surgency, (b) aggression-disagreeablenes s, and (c) trainability-openness. Canine and human personality similar ities are argued to have their origin in biogenetic factors stemming f rom common evolutionary sources and from canine breeding for human com patibility and assistance with human tasks. Each of the three canine f actors was shown to have a highly visible morphological indicator betw een breeds of dog. Reactivity-surgency was related to overall size, ag gression-disagreeableness was related to having pointed ears, and trai nability-openness was related to the ponderal index.