Comparing the performances of apes (Gorilla gorilla, Pan troglodytes, Pongo pygmaeus) and human children (Homo sapiens) in the floating peanut task.

There was again a significant difference between conditions in the latency until the first spit occurred (Friedman exact test: F = 6.40, n = 5, p = .039) Although subjects tended to add water earlier in the dry control than in the other control conditions ( M latency-DRY-Control = 20.7 s, M latency-TOP-Control = 64.5 s, M latency-TABLE-Control = 41.0 s), pair-wise comparisons failed to reach significance level (Wilcoxon exact tests: dry vs. top: T + = 5, n = 5, p = .063; effect size r estimate = −.91; dry vs. table: T + = 5, n = 5, p = .094; effect size r estimate = −.80; top vs. table: T + = 5, n = 5, p = .125; effect size r estimate = −.79).

also in 4,113 other papers

Despite the obvious drop-down of spitting latency and hand/foot actions both ‘before-after comparisons’ failed to reach statistical significance (Wilcoxon exact test for spitting latency: T + = 3, n = 4, p = .250; effect size r estimate = −.73; Wilcoxon exact test for hand/foot actions: T + = 3, n = 4, p = .125; effect size r estimate = −.91)—most probably because of the small sample size (four successful subjects) and the big variances involved.

also in 6,035 other papers