Autism as Evolutionary Condition

If the results from these three studies are combined, the overall proportion of left-handers is 13.3 per cent for autistic children and 8.3 per cent for matched controls, not a significant difference.  However, if left- and mixed-handers are summed, then the frequency of non-right-handedness among autistic children is considerably higher than that found in age-matched normally developing children, although it is similar to that found in other children of the same intellectual ability  (Bishop, D. V. M. (1990). Handedness and developmental disorder. London: Mac Keith Press.  p. 111)

There is a close associated between handedness and maturational delay. There is a close association between autism and handedness. There is a close association between maturational delay and autism. There is a close association between a mother’s testosteone levels and her children’s handedness and autism.

Seems pretty clear that a mother’s testosterone levels are closely associated with maturation rate.  There is a whole science devoted to maturation rates as those rates relate to evolution. That science is called heterochrony. Consider that autism is an evolutionary condition.

10 Responses to “Autism as Evolutionary Condition”

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  2. Some actual numbers on higher education spending ( and ).Total state and local taxpayer support for higher education: $70bn a year.Between 1982 and 2007, total inflation-adjusted federal and state aid, including grants, loans, work-study expenditures, and education tax benefits, rose from $30.8 billion to $103.9 billion annually.”Inflation-adjusted federal expenditures on research at academic institutions rose from $13.9 billion in 1980 to $31.4 billion in 2006.”Conclusion: “The public has been paying out the nose for higher education.”Ergo, MM was correct.

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  10. Susa, minäkin luin ekan Shieldsini vasta muutama vuosi sitten, vaikka "kaikki" ovat lukeneet häntä "aina". :) Vietinkin sitten oikein Shields-kesän, kun niin innostuin!Hyvä että toit esiin provosoivat kirjat, nekin ovat oma lajinsa. Ja kyllä minäkin pidän myös ei-mukavien kirjojen omistamisesta, koska pidän kaikkien kirjojen omistamisesta. Liikaakin….Hannele, niinpä, onneksi on valinnanvaraa! Joillain ihmisillä vain tuntuu olevan aika yksiselitteinen käsitys kirjoista ja sitä myöten lukemisestakin.

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