Editing Intelligence quotient (section)

===Heritability===
{{See also|Heritability of IQ|Environment and intelligence}}

The general figure for the [[heritability]] of IQ, according to an [[American Psychological Association]] report, is 0.45 for children, and rises to around 0.75 for late adolescents and adults.{{sfn|Neisser et al.|1995}} Heritability measures for [[G factor (psychometrics)|''g'' factor]] in infancy are as low as 0.2, around 0.4 in middle childhood, and as high as 0.9 in adulthood.<ref name="BouchardWilson2013">{{cite journal |last1=Bouchard |first1=Thomas J. |title=The Wilson Effect: The Increase in Heritability of IQ With Age |journal=Twin Research and Human Genetics |date=7 August 2013 |volume=16 |issue=5 |pages=923–930 |doi=10.1017/thg.2013.54 |pmid=23919982 |s2cid=13747480|doi-access=free }}</ref><ref name="PanizzonVuoksimaa2014">{{cite journal |last1=Panizzon |first1=Matthew S. |last2=Vuoksimaa |first2=Eero |last3=Spoon |first3=Kelly M. |last4=Jacobson |first4=Kristen C. |last5=Lyons |first5=Michael J. |last6=Franz |first6=Carol E. |last7=Xian |first7=Hong |last8=Vasilopoulos |first8=Terrie |last9=Kremen |first9=William S. |date=March 2014 |title=Genetic and environmental influences on general cognitive ability: Is ''g'' a valid latent construct? |journal=Intelligence |volume=43 |pages=65–76 |doi=10.1016/j.intell.2014.01.008 |pmc=4002017 |pmid=24791031}}</ref> One proposed explanation is that people with different genes tend to reinforce the effects of those genes, for example by seeking out different environments.{{sfn|Neisser et al.|1995}}<ref>{{cite journal |display-authors=8 |last1=Huguet |first1=Guillaume |last2=Schramm |first2=Catherine |last3=Douard |first3=Elise |last4=Jiang |first4=Lai |last5=Labbe |first5=Aurélie |last6=Tihy |first6=Frédérique |last7=Mathonnet |first7=Géraldine |last8=Nizard |first8=Sonia |last9=Lemyre |first9=Emmanuelle |last10=Mathieu |first10=Alexandre |last11=Poline |first11=Jean-Baptiste |last12=Loth |first12=Eva |last13=Toro |first13=Roberto |last14=Schumann |first14=Gunter |last15=Conrod |first15=Patricia |last16=Pausova |first16=Zdenka |last17=Greenwood |first17=Celia |last18=Paus |first18=Tomas |last19=Bourgeron |first19=Thomas |last20=Jacquemont |first20=Sébastien |author21=IMAGEN Consortium |title=Measuring and Estimating the Effect Sizes of Copy Number Variants on General Intelligence in Community-Based Samples |journal=JAMA Psychiatry |date=May 2018 |volume=75 |issue=5 |pages=447–457 |doi=10.1001/jamapsychiatry.2018.0039 |pmid=29562078 |pmc=5875373}}</ref>