Citation

Shaffer JW, Schmidt CW, Zlotowitz HI, Fisher RS. Arch. Gen. Psychiatry 1978; 35(1): 41-46.

Copyright

(Copyright © 1978, American Medical Association)

DOI

unavailable

PMID

619838

Abstract

Biorhythm, a theory that purports to identify periods of increased individual susceptibility to accident or misfortune on the basis of recurring biological cycles, is currently enjoying world-wide popularity. In view of the implications of such a theory for both public health and safety, the present study was undertaken as an empirical test of its validity. Using data from 205 carefully investigated highway crashes (135 fatal; 70 nonfatal) in which the drivers were clearly at fault, the authors computed specific points in drivers' biorhythm cycles at which the accidents occurred. The observed frequencies of accidents occurring during so-called critical and minus periods were then compared with the frequencies to be expected on a chance basis alone. The results provided no evidence for a relationship between purported biorhythm cycles and accident likelihood.

Language: en