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Comparison between the feature (mean of color, size and form discrimination) and positional discrimination tasks in the number of trials the ravens needed to reach the criterion and in the number of errors they made (Wilcoxon signed-ranks test, N=9)
| Acquisition |
Reversal |
|||
|---|---|---|---|---|
| No. of trials | No. of errors | No. of trials | No. of errors | |
| T + | 52 | 45 | 55 | 55 |
| p Value | <0.002 | 0.002 | <0.002 | <0.002 |
