Choice Bimanual Aiming with Unequal Indices of Difficulty
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
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Human performance response times to stimuli are typically predicted using two models first developed in the 1950s. Hicks Law, used to predict reaction time RT, linearly relates RT to the information content of the stimulus. Movement time MT is also predicted using an information-theoretic model known as Fitts Law which linearly relates MT to what Fitts called the index of difficulty ID of the particular task. These laws have been found to be quite robust in predicting RT and MT, respectively, for unimanual visula aiming tasks. Previous research involving bimanual aiming t hands are moving to targets of differing difficulty With only the easy-task hand slowing. Results have been inconsistent on the issue of whether the hands react and move in synchrony. Three studies were conducted to characterize temporal human bimanual aiming performance. Pilot Study I verified Hicks and Fitts Laws for unimanual tasks only. Pilot Study II established the utility of the stimulus-response board that was used as a testing medium for bimanual tasks. Hicks Law and Fitts Law held for the new apparatus. The Main Study tested twenty subjects performing discrete, unimanual and bimanual visual aiming tasks.
- Operations Research
- Target Direction, Range and Position Finding