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 …
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 …
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 …
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 …
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. …
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 …
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 …
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 …
correlation among relatives, while identical twins … The overriding importance of early nutrition for …
Potentially modifiable risk factors for dementia in identical twins
… 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 …
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 …
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 …
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 …
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
… 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…
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 …
… 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 …
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 …
… 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? …
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