are dogs better at tracking the movements of white objects or red objects? fifteen experienced "disk dogs" who have been trained to catch flying disks in mid-air are given the chance to catch a bright red disk or a plain white disk. each disk is thrown 10 times for each dog, with the sequence of disks (red or white) determined randomly. the proportion of red disks caught to the proportion of white disks caught is compared for each dog. this is an example of a
