The effect of grip-tension on tactile-kinaesthetic judgement of width

The effect of various grip-tensions on the accuracy of kinaesthetic width judgements was tested. Forty first-year psychology students were used as subjects. Significant differences in accuracy between pressures were found in the descending adjustments with greatest accuracy at 1.0 kg. Some significant differences were found between pressures in ascending adjustments. All subjects overestimated on the descending and underestimated on the ascending trials at all pressure levels. Increased grip-tension was found to reduce the accuracy of width judgement in terms of constant error while affecting varlance only slightly.