Table 1.

Likelihood ratio test of the GLMM models and ANOVA output of the LMM models.

	Main factors
	Session-Condition interaction	Session	Condition
Explanatory variables	GLMM
Number of giving pulls	Likelihood ratio test: χ2= 4.03 p = 0.5	Likelihood ratio test: χ2= 21.71 p < 0.001∗	Likelihood ratio test: χ2= 3.18 p = 0.53
	LMM
Vocalizations	F (4,71) = 0.09 p = 0.98	F(1,67) = 0.20 p = 1.65	F(4,67) = 1.54 p = 0.20
Stress behavior	F(4,74) = 1.01 p = 0.41	F(1,71) = 0.15 p = 0.69	F(4,68) = 4,23 p = 0.58
Gazing time toward the human	F(3,64) = 1.08 p = 0.36	F(3,67) = 0.02 P = 0.88	F(3,67) = 27.59 p < 0.001∗