Table 1

Results from linear mixed model analysis for sign-tracking (i.e., lever-directed) and goal-tracking (i.e., food-cup-directed) behaviors

PavCA behavior
Experiment 1	Number of lever contacts			Probability to contact lever			Latency to contact lever
Sign-tracking	df₁,df₂	F value	p value	df₁,df₂	F value	p value	df₁,df₂	F value	p value
Effect of phenotype	2,54.615	38.121	p < 0.001	2,57	56.803	p < 0.001	2,55.352	40.450	p < 0.001
Effect of session	4,87.711	15.929	p < 0.001	4,57	23.654	p < 0.001	4,79.678	35.451	p < 0.001
Phenotype × session	8,87.711	8.640	p < 0.001	8,57	9.027	p < 0.001	8,79.678	11.928	p < 0.001
	Number of food cup contacts			Probability to contact food cup			Latency to contact food cup
Goal-tracking	df₁,df₂	F value	p value	df₁,df₂	F value	p value	df₁,df₂	F value	p value
Effect of phenotype	2,63.287	52.264	p < 0.001	2,63.003	39.844	p < 0.001	2,60.931	45.807	p < 0.001
Effect of session	4,96.698	14.610	p < 0.001	4,155.487	10.960	p < 0.001	4,81.979	14.380	p < 0.001
Phenotype × session	8,96.698	16.953	p < 0.001	8,155.487	12.193	p < 0.001	8,87.711	17.313	p < 0.001
Experiment 2	Number of lever contacts			Probability to lever			Latency to contact lever
Sign-tracking	df₁,df₂	F value	p value	df₁,df₂	F value	p value	df₁,df₂	F value	p value
Effect of phenotype	2,25.738	73.590	p < 0.001	2,27.026	111.836	p < 0.001	2,27.037	65.914	p < 0.001
Effect of session	4,30.902	17.660	p < 0.001	4,25.527	37.054	p < 0.001	4,23.863	29.661	p < 0.001
Phenotype × session	8,30.902	10.840	p < 0.001	8,25.527	17.592	p < 0.001	8,23.885	12.406	p < 0.001

	Probability to Contact food cup			Number of food cup contacts			Latency to contact food cup
Goal-tracking	df₁,df₂	F value	p value	df₁,df₂	F value	p value	df₁,df₂	F value	p value
Effect of phenotype	2,31.080	39.402	p < 0.001	2,27.941	37.563	p < 0.001	2,26.445	41.540	p < 0.001
Effect of session	4,39.514	5.3831	p = 0.002	4,47.772	6.000	p = 0.001	4,56.426	9.495	p < 0.001
Phenotype × session	8,39.631	7.976	p < 0.001	8,47.731	10.586	p < 0.001	8,56.453	12.399	p < 0.001

Effect of phenotype, session, and phenotype × session interactions were analyzed for experiment 1 (top) and experiment 2 (bottom). df₁, degrees of freedom numerator; df₂, degrees of freedom denominator.