Table 3.

Factors affecting dogs' mean percentage of duration of gaze to the experimenter's face over the eight trials (four control trials and four test trials) each of 10 s duration

Model term	Value	SE	F	P
Session: before training	−0.674	0.123	30.782	<0.001
Age in months: quadratic	−16.096	4.477	4.490	0.011
Session: age in months: quadratic	11.283	4.155	3.753	0.024