Rhythmic manipulation of objects with complex dynamics: predictability over chaos.

ABSTRACT: The study of object manipulation has been largely confined to discrete tasks, where accuracy, mechanical effort, or smoothness were examined to explain subjects' preferred movements. This study investigated a rhythmic manipulation task, which involved continuous interaction with a nonlinear object that led to unpredictable object behavior. Using a simplified virtual version of the task of carrying a cup of coffee, we studied how this unpredictable object behavior affected the selected strategies. The experiment was conducted in a virtual set-up, where subjects moved a cup with a ball inside, modeled by cart-and-pendulum dynamics. Inverse dynamics calculations of the system showed that performing the task with different amplitudes and relative phases required different force profiles and re

SUBMITTER: Nasseroleslami B 

PROVIDER: S-EPMC4207605 | biostudies-literature | 2014 Oct

REPOSITORIES: biostudies-literature