Measuring gesture: its cultural and clinical correlates.

An ultrasonic system for measuring psychomotor behaviour is described, and then applied to compare the extent to which English and French students gesticulate. The findings supported the hypotheses that: (1) French students gesticulate more than the English both when using descriptive speech and when discussing their feelings; (2) descriptive speech elicits more gesture then affectively-toned speech; (3) when verbal expression is more difficult the use of gesture increases; (4) individuals tend to maintain a characteristic level of gesturing. We concluded the ultrasonic system provides a reliable and sensitive method for measuring gesture activity and can be applied clinically to the study of psychomotor behaviour.