Figure 1.

The proportion of male Phidippus clarus that won a contest with a naive size-matched rival at 4 time intervals after first winning (black) or losing (white) an initial contest. In P. clarus, relative size predicts competitive success, so if there is no experience effect, 50% of previous winners or losers should win subsequent contests (dotted line). Stars indicate proportions significantly different from 50% (see text).