Tag Archives | IQ

Flame-Retardant Chemicals May Be Linked to Lower IQs in Children

Picture: PD

Picture: PD

Chemicals once used to make furniture more resistant to flame has been implicated in childhood neurological deficits, including lower IQs and hyperactivity:

Via Scientific American:

The researchers tracked children through the first five years of their lives, looking at a battery of tests for IQ and behavior. They found that children of mothers who had high PBDE levels during their second trimester showed cognition deficits when the children were five years old as well as higher rates of hyperactivity at ages two to five. If the mother’s blood had a 10-fold increase in PBDEs, the average five-year-old had about a four-point IQ deficit. “A four-point IQ difference in an individual child may not be perceivable in…ordinary life. However, in a population, if many children are affected, the social and economic impact can be huge due to the shift of IQ distribution and productivity,” says lead author Aimin Chen, an assistant professor of environmental health at the University of Cincinnati College of Medicine.

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Scientists Debunk the IQ Myth

(I’m not surprised by this at all. I myself had middling experiences with IQ testing as a child. One year I was flagged as “gifted”, and then a few years of trouble at home and problems fitting in at a different school and suddenly I was in need of “special education”. – Editor)

Via ScienceDaily:

After conducting the largest online intelligence study on record, a Western University-led research team has concluded that the notion of measuring one’s intelligence quotient or IQ by a singular, standardized test is highly misleading.

The findings from the landmark study, which included more than 100,000 participants, were published Dec. 19 in the journal Neuron. The article, “Fractionating human intelligence,” was written by Adrian M. Owen and Adam Hampshire from Western’s Brain and Mind Institute (London, Canada) and Roger Highfield, Director of External Affairs, Science Museum Group (London, U.K).

Utilizing an online study open to anyone, anywhere in the world, the researchers asked respondents to complete 12 cognitive tests tapping memory, reasoning, attention and planning abilities, as well as a survey about their background and lifestyle habits.

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