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.