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It predicts girls’ growth accelerates around age 9 and stays ahead until 14–15, followed by deceleration at 15–16. Using the Spanish standardization sample from the DAT fifth edition, 1027 boys and 924 girls aged 12–18 were tested, showing younger advantages for girls and a relative decline in older groups, consistent with the theory.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/testing-the-developmental-theory-of-sex-differences-in-intelligence-on-1218-year-olds/291325/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/testing-the-developmental-theory-of-sex-differences-in-intelligence-on-1218-year-olds/291325.png","ImageObject",300,407,{"name":92,"@type":93},"Oliver","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-26","2026-09-17",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",14,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What does the consensus view say about sex differences in intelligence?","Question",{"text":113,"@type":114},"It claims there are no sex differences in intelligence.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"How does Lynn’s developmental theory predict sex differences across ages?",{"text":118,"@type":114},"Girls accelerate around age 9 and stay ahead until 14–15; at 15–16 their growth and intelligence decelerate relative to boys, and boys’ height and mean IQ increase afterward.",{"name":120,"@type":111,"acceptedAnswer":121},"How do the Spanish DAT results support the developmental theory?",{"text":122,"@type":114},"The DAT performance trend shows girls do better at younger ages and decline relative to boys in older age groups, aligning with the theory’s predicted profile.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},291325,1789644574,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":39,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":130,"read_time":46,"preview_page_count":4},8796095461610,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","Personality and Individual Differences 36 (2004) 75–82  \n[www.elsevier.com/locate/paid](www.elsevier.com/locate/paid)  \nTesting the developmental theory of sex differences in intelligence on 12–18 year olds  \nRoberto Coloma, * , Richard Lynnb  \naUniversidad Aut´onoma de Madrid, Facultad de Psicolog´ıa, 28049 Madrid, Spain  \nb University of Ulster, Coleraine, Ireland  \nReceived 15July 2002; received in revised form 30 December 2002; accepted 30 December 2002  \nAbstract  \nThe consensus view states that there are no sex differences in intelligence. However, Lynn (1994, 1999) has formulated a developmental theory of sex differences in intelligence that challenges that view. The theory states that boys and girls mature at different rates such that the growth of girls accelerates at the age of about 9 years and remains in advance of boys until 14–15years. At 15–16 years the growth of girls decelerates relative to boys. As boys continue to grow from this age their height and their mean IQs increase relative to those of girls. This paper presents new evidence for the theory from the Spanish standardization sample of the fifth edition of the DAT. 1027 boys and 924 girls between 12 and 18 years were tested. The general trend shows that girls do better at the younger ages and their performance declines relative to boys among older age groups, which supports the developmental theory. The sex difference for the DAT as a whole for 18 year olds is a 4.3 IQ advantage for boys, very close to the advantage that can be predicted from their larger brain size (4 .4 IQ points) . The profile of sex differences in abilities among the Spanish sample is closely similar to that in the United States and Britain, which is testimony to the robustness of the difference in these different cultures.  \n\\# 2003 Elsevier Ltd. All rights reserved.  \nKeywords: Sex differences; Intelligence; IQ; g; Development; Differential Aptitude Test; DAT  \n1. Introduction  \nFor the best part of a century it has been asserted that there is no sex difference in intelligence. In 1916, Lewis Terman (1916) adapted the Binet test and standardized it in the United States as  \n* Corresponding author. Tel.: +34-91-397-4141; fax: +34-91-397-5215 . E-mail address: [roberto.colom@uam.es](roberto.colom@uam.es) (R. Colom) .  \n0191-8869/03/$ -see front matter \\# 2003 Elsevier Ltd. All rights reserved. doi:10.1016/S0191-8869(03)00053-9  \n76 R. Colom, R. Lynn / Personality and Individual Differences 36 (2004) 75–82  \nthe Stanford-Binet test on approximately 1000 4–16 year olds. In this sample girls obtained a slightly higher average IQ than boys but ‘‘the superiority of girls over boys is so slight .. . that for practical purposes it would seem negligible’’(pp. 69–70) . A few years later, in Britain, Spearman (1923) asserted that there is no sex difference in g. In his 1971 textbook, Cattell (1971) concluded that ‘‘it is now demonstrated by countless and large samples that on the two main general cognitive abilities—fluid and crystallized intelligence—men and women, boys and girls, show no significant difference’’(p. 131) . Twelve years later, Court (1983) in a review of 118 studies on sex differences on the Raven Progressive Matrices (Raven, 1981), widely regarded as one of the best tests of general intelligence or g, concluded that ‘‘the accumulated evidence at all ability levels indicated that a biological sex difference cannot be demonstrated for performance on the Raven’s Progressive Matrices’’ (p. 68) . In his textbook, Brody (1992) concluded that ‘‘gender differences in general intelligence are small and virtually non-existent (p. 323) . Mackintosh (1996) writes that‘‘there is no sex difference in general intelligence worth speaking of’’ (p. 567) . Jensen (1998) concludes that ‘‘no evidence was found for sex differences in the mean level of g’’ (p. 531) . Lubinski (2000) that ‘‘most investigators concur on the conclusion that the sexes manifest comparable means on general intelligence’’ (p. 416); and Halpern ","cbCaiaRfhh0W2JcE","https://ap.wps.com/l/cbCaiaRfhh0W2JcE","pdf",156452,"English","# Abstract\n## Keywords\n# Introduction\n## Background: claims of no sex differences in intelligence\n## Alternative view: developmental theory\n## Biological basis and brain-size rationale","[{\"question\":\"What does the consensus view say about sex differences in intelligence?\",\"answer\":\"It claims there are no sex differences in intelligence.\"},{\"question\":\"How does Lynn’s developmental theory predict sex differences across ages?\",\"answer\":\"Girls accelerate around age 9 and stay ahead until 14–15; at 15–16 their growth and intelligence decelerate relative to boys, and boys’ height and mean IQ increase afterward.\"},{\"question\":\"How do the Spanish DAT results support the developmental theory?\",\"answer\":\"The DAT performance trend shows girls do better at younger ages and decline relative to boys in older age groups, aligning with the theory’s predicted profile.\"}]","Testing the developmental theory of sex differences in intelligence on 12–18 year olds | PDF"]