Abstract
Measures of motor expression of specific emotions recently reported by Trussoni, et al. in 1988 in this journal used large one-dimensional displacement (7 cm or more, vertical) as a measure, and not pressure, free in two dimensions as in the sentographic measurement of dynamic form used by Clynes. But to be forced to provide such one-dimensional movement strongly inhibits emotional expression. Additional problems of using displacement are discussed, including resetting. Also, to obtain adequate emotion generation experimentally, it is desirable to use the emotion-generating properties of a flow of appropriately repeated expressions for each emotion, for which timings were developed by Clynes rather than having subjects try to fantasize separately for each short expression. Trussoni, et al. erroneously reported discovering a flaw in the original sentograph, in its use of strain gauges, which actually are a standard, widely used and accurate means used for measurement of pressure.
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