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Childhood adversity is thought by most experts to be bad for cognitive development: for instance, people who grow up in stressful environments tend to score lower on tests of memory and IQ. They also perform worse on tests of impulse inhibition, which in turn predicts success and competence in later life. Comment?
The experience of seeing a lightning bolt before hearing its associated thunder some seconds later provides a fairly obvious example of the differential speeds of light and sound. But most intervals between linked visual and auditory stimuli are so brief as to be imperceptible. Comment?
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