The Flynn effect in sibships: Investigating the role of age differences between siblings

Sundet, Jon Martin; Eriksen, Willy; Borren, Ingrid; Tambs, Kristian

doi:10.1016/j.intell.2009.11.005

Cited by 22 publications

(30 citation statements)

References 25 publications

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“…The most promising sibling study conducted along the lines of that being proposed here is the aforementioned Norwegian study by Sundet et al [17]. Again, they found that later-born siblings were generally lower in IQ than their earlier-born siblings, but that this deficit varied, depending on the rate and direction of cohort changes, as well as on the siblings' age difference.…”

Section: Suggestion 3: Compare Siblingsmentioning

confidence: 76%

“…Recently, in Norwegian military data, Sundet et al found that later-born siblings tended to be lower in IQ than earlier-born siblings, but that the deficit varied as a function of age difference and the rate/direction of cohort changes. In times of rising IQ, the deficit narrowed with increasing age difference, while in times of declining IQ, it widened [17]. Any study should, therefore, try to break down intergenerational IQ changes into those caused by children with different characteristics, such as birth order or parental age.…”

Section: Suggestion 1: Compare Parents To Childrenmentioning

confidence: 99%

“…By comparing the results from different pairings, each genetically informed, one should gradually be able to figure out what environmental factors are most likely causing differences among siblings, if there are any. If differences are consistently found, one can eventually attempt to regress the differences between the siblings' raw scores on the difference between the siblings in the proposed causal factor (see [17], Figures 2 and 3). …”

Section: Suggestion 3: Compare Siblingsmentioning

confidence: 99%

“…These include height gains in The Netherlands [61], IQ gains in high income groups in the U.S. [64], declines in menarche in the UK [27], and the aforementioned results from Norway, which suggest that all males of birth order two or higher have fallen at least somewhat short of their IQ potential until quite recently [17]. As such, boosting these traits in poor countries should be relatively easy.…”

Section: Suggestion 4: Conduct More and Better Intervention Programsmentioning

confidence: 99%

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Future Efforts in Flynn Effect Research: Balancing Reductionism with Holism

Mingroni¹

2014

J. Intell.

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Abstract:After nearly thirty years of concerted effort by many investigators, the cause or causes of the secular gains in IQ test scores, known as the Flynn effect, remain elusive. In this target article, I offer six suggestions as to how we might proceed in our efforts to solve this intractable mystery. The suggestions are as follows: (1) compare parents to children; (2) consider other traits and conditions; (3) compare siblings; (4) conduct more and better intervention programs; (5) use subtest profile data in context; and (6) quantify the potential contribution of heterosis. This last section contains new simulations of the process of heterosis, which provide a plausible scenario whereby rapid secular changes in multiple genetically influenced traits are possible. If there is any theme to the present paper, it is that future study designs should be simpler and more highly focused, coordinating multiple studies on single populations.

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Section: Suggestion 3: Compare Siblingsmentioning

confidence: 76%

Section: Suggestion 1: Compare Parents To Childrenmentioning

confidence: 99%

Section: Suggestion 3: Compare Siblingsmentioning

confidence: 99%

Section: Suggestion 4: Conduct More and Better Intervention Programsmentioning

confidence: 99%

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Future Efforts in Flynn Effect Research: Balancing Reductionism with Holism

Mingroni¹

2014

J. Intell.

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“…(Conley & Glauber 2008). Tidligere forskning viser en klar tendens til at forskjellig plass i søskenflokken fører til ulike skårer på intelligenstester (Boomsma, van Beijsterveld, Beem, Hoekstra, Polderman & Bartels 2008;Sundet 2014;Sundet, Eriksen, Borren & Tambs 2010), ulik oppnåelse i utdanningssystemet (Black, Devereux & Salvanes 2005;Kristensen & Bjerkedal 2010) og ulik inntekt (Björklund, Eriksson, Jäntti, Raaum & Öster-backa 2004;Kantarevic & Mechoulan 2006). Det overordnede og veldokumenterte funnet er at eldre søsken gjør det bedre enn sine yngre familiemedlemmer sosioøkonomisk, her representert ved utdanning og inntekt, og at de skårer høyere på intelligenstester.…”

Section: Innledningunclassified

Fødselsrekkefølge og utdanningsoppnåelse:Har foreldrenes landbakgrunn betydning?

Isungset¹,

Lillehagen²,

Ugreninov³

2017

TfS

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Forsker, NOVA -Norsk institutt for forskning om oppvekst, velferd og aldring elisabeth.ugreninov@nova.hioa.no SAMMENDRAG Innen samfunnsforskningen er sosial bakgrunn en av hovedforklaringene på utdanningog yrkesoppnåelse i voksen alder. Samtidig har en lang forskningstradisjon vist at det er forskjeller mellom søsken i samme familie i sosioøkonomiske forhold, også kjent som fød-selsrekkefølgeeffekter. Betydningen av denne typen effekter har blitt dokumentert på en overbevisende og grundig måte de siste årene, men vi mangler studier av viktige undergrupper. I denne artikkelen benytter vi registerdata til å sammenlikne fødselsrekkefølgeef-fekter blant majoritetsbefolkningen og blant barn av innvandrere. Vi utfører separate analyser for de største gruppene av norskfødte med innvandrerforeldre. Resultatene for majoritetsbefolkningen bekrefter tidligere funn: Ved 25 års alder har førstefødte et halvt år lengre utdanning enn fjerde-og senerefødte i samme familie. Blant norskfødte med innvandrerforeldre finner vi imidlertid få eller ingen forskjeller mellom søsken i samme familie. Dette funnet er viktig i lys av tidligere teori og empiri, som fremhever fødselsrekkeføl-geeffekter som noe en skulle forvente å finne uavhengig av kulturell bakgrunn. Vi foreslår forskjeller i familiesosialisering og institusjonell tilpasning som mulige forklaringer.

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Adolescent boys’ physical fighting and adult life outcomes: Examining the interplay with intelligence

Frøyland

Soest

2019

Aggressive Behavior

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Although it is well known that adolescent delinquent behavior is related to poor outcomes in adulthood, longitudinal research on specific acts of delinquency and their interplay with important individual characteristics in predicting future outcomes is scarce. We aimed to examine how physical fighting-one of the most common acts of violent delinquency among adolescent boys-is related to adult life success in several domains, and how intelligence influences these associations. The study used data from 1,083 boys that participated in the population-based longitudinal Young in Norway Study, following adolescents from 1992 to 2015, by combining self-reports at four time points with comprehensive information from registers. Results showed that adolescent boys' physical fighting was associated with poor adult outcomes in the domains of employment, education, and criminal behavior. Associations remained significant even after controlling for conduct problems in general-which isolated the effects of fighting from other delinquent acts-as well as from a variety of other potential confounders. Detailed analyses on the interplay of physical fighting and intelligence showed that some parts of the associations between adolescent boys' fighting and several adverse adult outcomes could be ascribed to lower intelligence among the fighters. Moreover, intelligence moderated the relationship between physical fighting and adult education. Adolescent fighting was not related to educational attainment among boys with high intelligence, whereas boys with lower intelligence experienced detrimental effects of adolescent fighting. The analyses show the importance of considering adolescent boys' physical fighting as a potential risk factor for future social marginalization.

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The Flynn effect in sibships: Investigating the role of age differences between siblings

Cited by 22 publications

References 25 publications

Future Efforts in Flynn Effect Research: Balancing Reductionism with Holism

Future Efforts in Flynn Effect Research: Balancing Reductionism with Holism

Fødselsrekkefølge og utdanningsoppnåelse:Har foreldrenes landbakgrunn betydning?

Adolescent boys’ physical fighting and adult life outcomes: Examining the interplay with intelligence

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