document: Control performance with three translational degrees of freedom For multiple degree-of-freedom -LRB- DOF -RRB- systems , it is important to determine how accurately operators can control each DOF and what influence perceptual , information processing , and psychomotor components have on performance . Sixteen right-handed male students participated in 2 experiments : 1 involving positioning and 1 involving tracking with 3 translational DOFs . To separate perceptual and psychomotor effects , we used 2 control-display mappings that differed in the coupling of vertical and depth dimensions to the up-down and fore-aft control axes . We observed information processing effects in the positioning task : Initial error correction on the vertical dimension lagged in time behind the horizontal dimension . The depth dimension error correction lagged behind both , which was ascribed to the poorer perceptual information . We observed this perceptual effect also in the tracking experiment . Motor effects were also present , with tracking errors along the up-down axis of the hand controller being 1.1 times larger than along the fore-aft axis . These results indicate that all 3 components contribute to control performance . Actual applications of this research include interface design
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