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. 2021 May 6;8(3):ENEURO.0384-20.2021. doi: 10.1523/ENEURO.0384-20.2021

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.