Editing Neuroscience and intelligence (section)

===Cortical thickness===

[[Cerebral cortex#Thickness|Cortical thickness]] has also been found to correlate positively with intelligence in humans.<ref name=Narr2007 /> However, the rate of growth of cortical thickness is also related to intelligence.<ref name=Shaw2006 /> In early childhood, cortical thickness displays a negative correlation with intelligence, while by late childhood this correlation has shifted to a positive one.<ref name=Shaw2006 /> More intelligent children were found to develop cortical thickness more steadily and over longer periods of time than less bright children.<ref name=Shaw2006 /> Studies have found cortical thickness to explain 5% in the variance of intelligence among individuals.<ref name=":0" /> In a study conducted to find associations between cortical thickness and general intelligence between different groups of people, sex did not play a role in intelligence.<ref name="Menary 597–606">{{Cite journal|last1=Menary|first1=Kyle|last2=Collins|first2=Paul F.|last3=Porter|first3=James N.|last4=Muetzel|first4=Ryan|last5=Olson|first5=Elizabeth A.|last6=Kumar|first6=Vipin|last7=Steinbach|first7=Michael|last8=Lim|first8=Kelvin O.|last9=Luciana|first9=Monica|date=2013-01-01|title=Associations between cortical thickness and general intelligence in children, adolescents and young adults|journal=Intelligence|volume=41|issue=5|pages=597–606|doi=10.1016/j.intell.2013.07.010|issn=0160-2896|pmc=3985090|pmid=24744452}}</ref> Although it is hard to pin intelligence on age based on cortical thickness due to different socioeconomic circumstances and education levels, older subjects (17 - 24) tended to have less variances in terms of intelligence than when compared to younger subjects (19 - 17).<ref name="Menary 597–606"/>{{dubious|Sloppy_extraction_from_cite?|date=May 2018}}