The role of nutrition in secular increases in intelligence

R Lynn - Personality and individual differences, 1990 - Elsevier
… Evidence that the visuo-spatial abilities are more sensitive to nutrition than the verbaleducational
abilities comes from two studies of identical twins with differing birth weights. Willerman …

A nutrition theory of the secular increases in intelligence; positive correlations between height, head size and IQ

R Lynn - British Journal of Educational Psychology, 1989 - Wiley Online Library
… an effect of nutrition on intelligence conies from studies of identical twins with different birth
weights. Where this occurs, the different birth weights are due to insufficient nutrition reaching …

[PDF][PDF] Factors influencing intelligence quotient

A Oommen - Journal of Neurology & Stroke, 2014 - asset-pdf.scinapse.io
… play in human intelligence. They theorize that if intelligence is purely biological, identical
twins separated at birth … Prenatal and early nutrition are linked to brain structure, behavior and …

Environmental Sources of Intelligence Differences among Separated Identical Twins.

RH Franke, PJ Paduch - 1984 - ERIC
… in the IQ levels of identical twins, with relationships for twins … in IQ between separated
identical twins to differences in the … " set of data from separated identical twins indicates specific …

The effect of added thiamine on intelligence and learning with identical twins.

KS Bernhardt, ML Northway… - Canadian Journal of …, 1948 - psycnet.apa.org
… The tests used included an intelligence test and a number of tests of learning. It was thought
that a group of identical twins … A complete analysis for 36 pairs of identical twins was made. …

On intrapair differences in male twins with special reference on dominance-submissiveness.

P Tienari - Acta psychiatrica scandinavica, 1966 - psycnet.apa.org
… 8 intelligence tests and a personality inventory were administered to 179 identical twins and
179 fraternal pairs. A total of 56 variables were studied, 20 based on interview data, 35 from …

Hemivertebrae in identical twins with dissimilar spinal columns

HA PETERSON, LFA PETERSON - JBJS, 1967 - journals.lww.com
… It becomes obvious that genetically identical twins, despite identical chromosonial components
arid common placental circulations, require precisely similar conditions to be identically …

No genes for intelligence in the fluid genome

MW Ho - Advances in child development and behavior, 2013 - Elsevier
intelligence; instead, environment and maternal effects may account for most, if not all
correlation among relatives, while identical twins … The overriding importance of early nutrition for …

Potentially modifiable risk factors for dementia in identical twins

M Gatz, JA Mortimer, L Fratiglioni, B Johansson… - Alzheimer's & …, 2006 - Elsevier
… The study of identical twins who are discordant for Alzheimer’s disease allows the contributions
of environmental factors to be isolated from genetic influences. We tested three types of …

The zombie theory of genetic intelligence

T Wrigley - FORUM, 2019 - ingentaconnect.com
… Imagine a country where every child enjoys perfect nutrition … studies compare identical twins
with non-identical twins and … identical experiences, and that identical twins are no different in …

Effects of birth weight on later intelligence

S Scarr - Social Biology, 1982 - Taylor & Francis
… , including such variables as maternal nutrition, infections, ade… Identical twins also have
similar postnatal environments. … of intelligence, can be controlled by the use of identical twins

[CITATION][C] Nutrition and intelligence

R Lynn - … approaches to the study of human intelligence, 1993 - Ablex Norwood, NJ

Insight into intelligence

NJ Mackintosh - Nature, 1995 - Springer
intelligence - in all … identical twins published in the past five years (T. Bouchard, Univ.
Minnesota) have reported correlations of over 0.70 in their IQ scores; separated non-identical twins

[CITATION][C] Intelligence quotients and socioeconomic factors

A Motlagh, M Safarpour, M Hosseini, M Safarpour… - Intl Res J Appl Basic Sci, 2013

Resolving the genetic and environmental sources of the correlation between height and intelligence: A study of nearly 2600 Norwegian male twin pairs

JM Sundet, K Tambs, JR Harris, P Magnus… - Twin Research and …, 2005 - cambridge.org
… The full model for identical twins is shown in Figure 1. … cognitive stimulation and more
adequate nutrition. Secular trends show increases in height and intelligence in numerous countries…

THE HERITABILITY OF FLUID, gf, AND CRYSTALLISED, gc, INTELLIGENCE, ESTIMATED BY A LEAST SQUARES USE OF THE MAVA METHOD

RB Cattell - British Journal of Educational Psychology, 1980 - Wiley Online Library
… All were males, for identical twins have to be same sex and the toss gave males, so we are
… the ‘ stimulating environment for intelligence ’ and biological, acting in prenatal nutrition, birth …

[PDF][PDF] Intelligence quotient and socio-economic factors

A Motlagh, M Safarpour, M Hosseini… - Intl Res J Appl Basic …, 2013 - old.tums.ac.ir
… of identical twins (who share all their genes) are more similar to each other IQ scores than
non- identical twins (… Nutritional status and intelligence quotient of primary schoolchildren in …

CYANOTIC CONGENITAL HEART DISEASE (Triology of Fallot) IN ONE OF IDENTICAL TWINS

EVAL KONONEN, WB MacDonald… - Journal of Paediatrics …, 1966 - Wiley Online Library
… Both children are righthanded and are of average intelligence. In personality Sandra tends
… wide variety of physical, chemical and nutritional agents produce congenital malformations of …

Apart from genetics: What makes monozygotic twins similar?

G Mandler - The Journal of Mind and Behavior, 2001 - JSTOR
… not be correlated in terms of nutrition. Since it is known that … We do not know w handle the
placement of identical twins exactly … the similarity in intelligence of identical twins reared apart? …

[CITATION][C] Psychosocial aspects of mental retardation

MJ Begab - Developmental disabilities: No longer a private tragedy, 1983