Abstract
Review of the literature concerning the relationship of biorhythm theory to human error accidents indicates there is much inconsistency. This study attempted to resolve some of the existing variability through careful selection and statistical analysis of a driver-error subject population. Fatalities involving 506 U.S. Naval off-duty personnel were examined. Birth dates were compared with accident dates to determine if the differences between observed and expected accident frequencies were significant. No chi-square values were found to be statistically significant at the .05 level. It was concluded that biorhythm is not a useful accident prevention aid. Inconsistency in human error research will continue to be reported until experimenters more precisely define birth and accident times and combine this information with more rigidly designed research methodology.
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