Proposed General Fitness Factor of Both Cognitive Ability and Health, The f-factor
Because of the above mentioned findings, some researchers have proposed a general factor of fitness analogous to the g-factor for general mental ability/intelligence. This factor is supposed to combine fertility factors, health factors, and the g-factor. For instance, one study found a small but significant correlation between three measures of sperm quality and intelligence.
Read more about this topic: Cognitive Epidemiology
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