A computational model of stereoscopic prey capture in praying mantises
Fig 7
Variance versus mean for number of strikes per trial.
Symbols labeled “2016-crossed/uncrossed” represent data from [10]; GM-A-D are from our ghost-match experiments, see Fig 10 below. We pooled data from all trials in all mantids for a given stimulus (disk size and geometry), and computed the mean and variance of the number of strikes observed across trials. The number of trials contributing to each data-point is 68 for the data from [10], 120 for the GM-D condition and 170 for GM-A,B,C. Symbols encode disk diameter in degrees; color encodes stimulus geometry and data-set. The scatterplot shows variance plotted against mean, with the black line marking the identity. For a Poisson distribution, variance = mean and so points should lie on the identity.