forecastingprinciples.com Reviews of Important Papers on Forecasting
Before 1985 Reviews
Review of:

David S. Holmes, et al (1980), "Biorhythms: their utility for predicting post-operative recuperative time, death and athletic performance," Journal of Applied Psychology, 65, 233-236.


The marketplace declares biorhythms as a winner. Unfortunately, research studies do not agree. Holmes et al. add three more competent studies. They show no value to biorhythms as a predictive tool.