Table 2.
Operant conditioning: statistical information (Χ2; p) of the effects on the number of target touches: (a) Results for the habituation phase, experimental phase, and reversal phase; (b) Detailed statistical results of the effects of target touches for the dog and sheep videos during the reversal phase.
| Phase or Video Type | Global | Effect of Target Touch | Video Valence | Video Intensity | Day of Test | Interactions | |
|---|---|---|---|---|---|---|---|
| (a) | Habituation phase | 13.69; 0.44 | NA | - | - | - | - |
| Experimental phase | 19.11; 0.07 | NA | 1.44; 0.23 | 0.07; 0.79 | 14.65; 0.003 | All interactions ≤0.53; ≥0.78 |
|
| Reversal phase | 37.61; 0.08 | 5.83; 0.06 | −0.40; 1 | 0.99; 0.41 | 3.57; 0.21 | Effect * Valence 4.28; 0.06 Day of test * Valence 5.52; 0.08 All other interactions ≤4.27; ≥0.11 |
|
| (b) | Dog videos | 43.92; 0.001 | 17.76; 0.002 | NA | 1.02; 0.42 | 14.39; 0.003 | All interactions ≤1.53; ≥0.14 |
| Sheep videos | 7.28; 0.85 | - | NA | - | - | - | |
* include the main effects and all the possible interactions among the predictors separated by ‘*’ (as with the formula notation in R).