Neuroscience
Quotes of Whoa #4: Genetic Destiny?
"Once we realise that the basic wiring plan of the brain is under genetic influence, it's easy to see how not only animals but also people can have very similar brains and yet be so different, right from the start of their lives. Genetic forces, operating on the synaptic arrangement of the brain, constrain, at least to some extent, the way we act, think, and feel ... Still, it's important to recognise that genes only shape the broad outline of mental and behavioural functions, accounting for at most 50 percent of a given trait, and in many instances for far less. Inheritance may bias us in certain directions, but many other factors dictate how one's genes are expressed.
"For example, if a woman consumes excessive alcohol during pregnancy, or a child has a diet deficient in certain nutrients, a brain genetically destined for brilliance can instead turn out to be cognitively impaired. Likewise, a family history of extraversion can be squelched in an orphanage run with an iron fist, just as a natural tendency to be shy and withdrawn can be compensated for to some degree by the supportive encouragement of parents. Even if it becomes possible to clone a child who has died at a tender age, it's probable that the look-alike, having his own set of experiences, is going to act, think, and feel differently ... Genes are important, but not all-important."
-- Joseph LeDoux, 'Synaptic Self' (2002), p. 4-5.
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Robert Plomin: Nature, Nurture
After forty years doing research on nature and nurture in psychology, there are two crucial (not just nagging) things I want to understand. One is about nature and one is about nurture. About nature: Behavioural genetic research has shown that genetics...
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Switching The Parents Around
Judith Rich Harris: "In a 1995 paper in Psychological Review, I proposed a new theory of child development, based on the idea that children's personalities are shaped, not by their parents, but by the environment they encounter outside the home. This...
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Investigating The Role Of Genes In Boys' And Girls' Science Ability
Former Harvard president Larry Summers caused a storm in 2005 when he suggested part of the reason women are under-represented in science is because of innate, biological differences between the sexes. Now, for the first time, researchers in London have...
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Why Psychologists Study Twins
In the second of our on-going series of guest features for psychology students, Dr. Angelica Ronald of London's Institute of Psychiatry describes the use of twin studies in psychology. Psychologists are often trying to control one thing to look at...
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Most Genes That Influence Maths Ability Also Affect Reading
Diagnostic labels such as dyslexia and dyscalculia tend to highlight the separateness of various mental capabilities from general intelligence. But a new study has shown that most of the genes that influence young children’s mathematics ability also...
Neuroscience