(e) Statistical analysis

The distribution of the forelimb use during reaching was tested for deviation from the expected binomial distribution (p = 0.5). Classes in which expected values were less than 3 were amalgamated with the adjacent classes. A G-test for goodness of fit to the intrinsic hypothesis was used with William's adjustment (G_adj) applied [12]. A two-tailed exact binomial test was used to determine whether individual locusts deviated from the expected binomial distribution (p = 0.5). An independent samples t-test was conducted to compare the mean number of missed reaches between strongly and weakly biased individuals. A Spearman's rank correlation was used to test for a significant relationship between the strength of individual handedness and the number of reaching errors.