Svenska och danska forskare visar att låg intelligens bland icke-vita och icke-gula invandrargrupper är orsaken till deras genomsnittligt högre brottslighet och ”utanförskap” jämfört med t.ex. svenskar:
http://www.friatider.se/rekordhog-un...ngfaldsomraden
http://ftp.iza.org/dp2759.pdf
Citat:
ABSTRACT
The Income Gap Between Natives and Second Generation
Immigrants in Sweden: Is Skill the Explanation?*
This is the first study to use an achievement test score to analyze whether the income gap between second-generation immigrants and natives is caused by a skill gap rather than ethnic discrimination. Since, in principle, every male Swedish citizen takes the test when turning 18, we are able to bring more evidence to bear on the matter by estimating the income gap for a very large sample of individuals who are of the same age and have the same years of schooling at the test date. Once the result of the Swedish Military Enlistment Test is controlled for, the income gap almost disappears for second generation immigrants with both parents born in Southern Europe or outside Europe. However, when using a regular set of control variables the income gap becomes overestimated. This difference in results is most likely explained by the fact that schooling is a bad measure of productive skills for these groups of second-generation immigrants. It indicates that they compensate for their lower probability of being employed by investing in (in relation to their skill level) more schooling than otherwise similar natives.
Adopterade från länder utanför Europa och Östasien har genomsnittligt lägre IQ:
http://europepmc.org/abstract/MED/18...YFQlOrpOEkE.18
Citat:
Does age at adoption and geographic origin matter? A national cohort study of cognitive test performance in adult inter-country adoptees.
Odenstad A, Hjern A, Lindblad F, Rasmussen F, Vinnerljung B, Dalen M
Stress Research Institute, Stockholm University, Sweden.
Psychological Medicine [2008, 38(12):1803-1814]
Type: Journal Article, Research Support, Non-U.S. Gov't
DOI: 10.1017/S0033291708002766
Abstract
BACKGROUND: Inter-country adoptees run risks of developmental and health-related problems. Cognitive ability is one important indicator of adoptees' development, both as an outcome measure itself and as a potential mediator between early adversities and ill-health. The aim of this study was to analyse relations between proxies for adoption-related circumstances and cognitive development.
Method: Results from global and verbal scores of cognitive tests at military conscription (mandatory for all Swedish men during these years) were compared between three groups (born 1968-1976): 746 adoptees born in South Korea, 1548 adoptees born in other non-Western countries and 330 986 non-adopted comparisons in the same birth cohort. Information about age at adoption and parental education was collected from Swedish national registers.
RESULTS: South Korean adoptees had higher global and verbal test scores compared to adoptees from other non-European donor countries. Adoptees adopted after age 4 years had lower test scores if they were not of Korean ethnicity, while age did not influence test scores in South Koreans or those adopted from other non-European countries before the age of 4 years. Parental education had minor effects on the test performance of the adoptees - statistically significant only for non-Korean adoptees' verbal test scores - but was prominently influential for non-adoptees.
CONCLUSIONS: Negative pre-adoption circumstances may have persistent influences on cognitive development. The prognosis from a cognitive perspective may still be good regardless of age at adoption if the quality of care before adoption has been 'good enough' and the adoption selection mechanisms do not reflect an overrepresentation of risk factors - both requirements probably fulfilled in South Korea.