Figure 3.

Relationship between performance of red junglefowl chicks in various cognitive tests. Associations between: (a) learning speed in a discriminative learning test and approach probability to ambiguous cues, (b) learning speed in a discriminative learning test and approach latency to ambiguous cues, (c) learning speed in a reversal task and approach probability to ambiguous cues, (d) learning speed in a reversal task and approach latency to ambiguous cues. Learning speed is measured as trials until criterion is reached. Points represent individual best linear unbiased predictors (BLUPs) estimates from bivariate mixed models. Correlations were calculated from model 2 × 2 covariance matrixes of individual random effects. Significance (*) was assessed via LRT.