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Class Notes October 21

Class Notes October 21 - Intelligence Social Problems and...

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October 21, 2010 Intelligence Social Problems and Low IQ o Low IQ predicts poverty, even more than SES does. o Low IQ increases risk of dropping out. o Low IQ is associated with unemployment, chronic welfare dependency, and frequent injury. o Low IQ is related to high rates of divorce, lower rates of marriage, and higher rates of single-parent births. Babies of low-IQ mothers tend to have lower birth weight, poor motor skills and social development, and more behavior problems. o Low IQ increases the risk of crime. o Those with low IQ vote less often. Types of IQ o Ratio IQ First type of IQ Stern (1938) IQ = ((Mental Age * 100) / (Chronological Age)) Same IQ has different meanings at different ages A single measure of “general intelligence” Not used very often anymore o Deviation IQ A type of standardized score Average = 100 Compares IQ to same age peers Normal (bell-curve) distribution Theories of Intelligence
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o Terman coined the term “Intelligence Quotient” (IQ) in 1916 o Spearman’s 2 Factor Theory (1927) o Intelligence = General factors (g) — “mental energy” E.g., abstract reasoning, problem solving Specific factors (s) — less complex tasks E.g., motor speed, attention, memory o
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