Science: The Trembling Finger

Dr. Austin S. Edwards of the University of Georgia works for a tobacco-growing state, but in the latest Journal of Applied Psychology he reports one effect of tobacco smoking: it increases "finger tremor," an indication of disturbance in the nervous system.

He tested a group of psychology students with a "finger tronometer" (his own invention), which measures the trembling of an outstretched human finger. First he measured the students' "finger tremor" before they started smoking. Then he let each of them smoke half a cigarette, and measured their tremor again. The fingers of the hardened smokers, he found, had increased their trembling...

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