7-YEAR (CIRCASEPTENNIAN) PATTERNS IN PSYCHOLOGY AND BIOLOGY - COMMENTON VERHULST AND ONGHENA

Nonlinear rhythmometry confirms a pattern of about 7 years, describing the number of births by birth year of quantum fathers reported by Ver hulst and Onghena in 1996 and estimates the period to be 6.53 years wi th a 95% confidence interval overlapping 7 years. Other patterns of ab out 7 years are found in biology, as shown herein for the mean gonadal weight of an echinoderm (the purple sea urchin) and a mollusk (the bl ack chiton). A number of periodic components with different frequencie s, some shown to be genetically anchored, await applications in psycho logy as well as in other fields of medicine and biology.