=+moved across the screen. The following data are consistent with summary values and a graph given in the article.

Each value represents the average catch time over all subjects. The order of the various speed–length combinations was randomized for each subject.

Prey Prey Catch Length Speed Time 7 20 1.10 6 20 1.20 5 20 1.23 4 20 1.40 3 20 1.50 3 40 1.40 4 40 1.36 6 40 1.30 7 40 1.28 7 80 1.40 6 60 1.38 5 80 1.40 7 100 1.43 6 100 1.43 7 120 1.70 5 80 1.50 3 80 1.40 6 100 1.50 3 120 1.90