Search PubMed⌕ Search

Biomedical subjects

D B Beringer

Publications and source records attributed to D B Beringer.

4 recordsLinked to original sources
PubMed1998

Directional stimulus-response compatibility: a test of three alternative principles.

The basis of directional stimulus-response compatibility was studied using a task in which 128 participants moved a cursor into targets with a joystick, resembling the operation of certain industrial and construction equipment. Compatible and incompatible versions of three alternative compatibility principles were compared in all combinations. Visual Field (VF) compatibility was present if cursor and controlling limb movement were in the same direction in the visual field, Control Display (CD) compatibility meant that the control motion was in the same direction as, and parallel to, cursor motion, and Muscle Synergy (MS) compatibility was defined as use of the muscle synergy normally associated with the required direction as seen in the visual field. VF-compatible conditions had significantly shorter reaction, movement and homing times, and fewer reversal errors, for males and females, in two testing sites. These advantages were maintained over practice. VF compatibility was confirmed as a robust spatial compatibility principle that is affected by neither the orientation of the operator's limb or head nor the muscle synergy used in executing the task. It offers not only more rapid performance, but also a markedly reduced rate of potentially dangerous directional errors. The relationship between this finding and theoretical aspects of stimulus-response compatibility is discussed.

Adult↗
PubMed1989

Operator orientation and compatibility in visual-motor task performance.

This experiment assessed three alternative forms of directional compatibility between control and display movement, to examine their degree of dependence on the orientation of the operator. Subjects performed a target acquisition task in each of 11 conditions which embodied the three compatibility types alone or in combination. Visual-motor (VM) compatibility was defined as display movement in a given direction in the subject's visual field produced by control movement in the same direction in the subject's 'virtual' visual field (i.e., were he or she looking at the control rather than the display). Control-display (CD) compatibility referred to congruence between control and display movements. Visual-trunk (VT) compatibility was present if a control movement was in the same direction relative to the operator's trunk as the movement of the display in the visual field. VM compatibility produced performance superior to that under CD or VT compatible conditions in all phases of the task, and was independent of the subject's physical orientation and of the target direction. Visual-motor compatibility appears to reflect a basic and general relationship between visual and motor codes in the central nervous system, and may prove a useful basis for reducing errors and enhancing performance in certain human-machine systems.

Adult↗
PubMed1985

A comparative evaluation of calculator watch data entry technologies: Keyboards to chalkboards.

Future limitations on the usable complexity of wrist-worn digital devices will depend upon the flexibility and data transmission rate/accuracy of the user-system interface. Three candidate interface types were evaluated as represented by current calculator watch technology. These included hardware keys, software keys and figural recognition. While the figural recognition device theoretically required the least training to operate, other factors degraded operator performance considerably. Specifically, entry rates were slower for this device and error rates higher than for the other two types of devices. It was concluded that the most promising interface for future applications of this type will require technological advances before it becomes competitive with the other interface types.

Journal Article↗