Multiple regression analysis on stranger-directed aggression.

<p>Values are coefficient of determination (R²), the number of animals (n), and Standard partial regression coefficients of selected variables.</p><p>N shows the number of breeds out of 14 in which a certain variable was selected in the multiple regression analyses.</p><p>Four explanatory variables (“source of acquisition”, “housing condition”, “sex”, and “neutered”) were applied as nominal variables.</p><p>a: p<0.001, b: p<0.01, c: p<0.05.