The present study examined how pitch probability and visual trajectory information are integrated to guide motor behavior in a simulated baseball batting task.Design:
The reliability of probability information was varied by comparing conditions in which the different simulated pitch types were equiprobable with conditions in which one pitch type had a high probability. The reliability of visual trajectory information was varied by changing the instant at which the simulated ball was occluded (from 50 to 150 ms after pitch release).Method:
In Experiment 1 there were two simulated pitch types (fastball and curveball) while in Experiment 2 a third type (changeup) was added. Repeated measures designs were used in both experiments.Results:
In both experiments, there were significant probability x occlusion time interactions for both batting performance and batting kinematics. Varying pitch probability had a larger effect on batting performance and led to kinematic changes earlier in the swing when the occlusion was early in the ball's flight as compared to when it was late.Conclusions:
Batters can flexibly integrate different sources of information based on their relative reliability and the time at which they become available during the course of the swing.