Understanding of and reasoning about object-object relationships in long-tailed macaques? (vol 16, pg 493, 2013)

摘要

A re‐inspection of the data of Experiment 2 (“reducing the computational demands—flat board versus cup”) revealed that for two subjects, one trial, each in the control condition A in which the reward was hidden underneath of one of two cups, had been coded erroneously as incorrect choices; the two subjects had indeed selected the baited object in both trials. We re‐calculated the repeated-measures ANOVA, which we had reported as a test of subjects’ performances in the four different conditions. The corrected results demonstrate, as before, that performance differed between conditions (F 3,21 = 6.778, P = 0.002; previously: F 3,21 = 7.143, P = 0.002). With one exception, the post hoc comparisons yielded equivalent results [even though the P values changed slightly (see below)]. The only qualitative change was found in the comparison between condition C (one board and one cup, with the food underneath the board) and the control condition A (two cups). Whereas we had originally reported a significant difference between these conditions (P = 0.035), this contrast now marginally fails to reach significance (P = 0.051).