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Intelligence quotient
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==Citations== <!-- This article uses the citation templates described in [[User:RexxS/Cite_multiple_pages]]. Thank you to RexxS for the detailed tips. --> {{Reflist|30em|refs= <ref name="Gottfredson2009pp31–32">{{Harvnb |Gottfredson|2009|pages=31–32}}</ref> <ref name="Hunt2011p5">{{Harvnb |Hunt|2011|page=5}} "As mental testing expanded to the evaluation of adolescents and adults, however, there was a need for a measure of intelligence that did not depend upon mental age. Accordingly the intelligence quotient (IQ) was developed. ... The narrow definition of IQ is a score on an intelligence test ... where 'average' intelligence, that is the median level of performance on an intelligence test, receives a score of 100, and other scores are assigned so that the scores are distributed normally about 100, with a standard deviation of 15. Some of the implications are that: 1. Approximately two-thirds of all scores lie between 85 and 115. 2. Five percent (1/20) of all scores are above 125, and one percent (1/100) are above 135. Similarly, five percent are below 75 and one percent below 65."</ref> <ref name="TermanOldClasses">{{Harvnb |Terman|1916|page=[https://archive.org/details/measurementofint008006mbp/page/n106 79]}} "What do the above IQ's imply in such terms as feeble-mindedness, border-line intelligence, dullness, normality, superior intelligence, genius, etc.? When we use these terms two facts must be born in mind: (1) That the boundary lines between such groups are absolutely arbitrary, a matter of definition only; and (2) that the individuals comprising one of the groups do not make up a homogeneous type."</ref> <ref name="WechslerOldClasses">{{Harvnb |Wechsler|1939|page=37}} "The earliest classifications of intelligence were very rough ones. To a large extent they were practical attempts to define various patterns of behavior in medical-legal terms."</ref> <ref name="Kaufman2009p21">{{Harvnb |Kaufman|2009|page=21}} "Galton's so-called intelligence test was misnamed."</ref> <ref name="Kaufman2009">{{Harvnb |Kaufman|2009}}</ref> <ref name="Urbina2011Table2.1">{{Harvnb |Urbina|2011|loc=Table 2.1 Major Examples of Current Intelligence Tests}}</ref> <ref name="FlanaganHarrison2012chs8-16">{{Harvnb |Flanagan|Harrison|2012|loc=chapters 8–13, 15–16}} (discussing Wechsler, Stanford–Binet, Kaufman, Woodcock–Johnson, DAS, CAS, and RIAS tests)</ref> <ref name="Kaufman2009Fig5.1">{{Harvnb |Kaufman|2009|loc=Figure 5.1 IQs earned by preadolescents (ages 12–13) who were given three different IQ tests in the early 2000s}}</ref> <ref name="KaufmanSB2013Fig3.1">{{Harvnb |Kaufman|2013|loc=Figure 3.1 "Source: {{harvp|Kaufman|2009}}. Adapted with permission."}}</ref> }}
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