Genetics and general cognitive ability (g)

@article{Plomin2002GeneticsAG,
  title={Genetics and general cognitive ability (g)},
  author={Robert Plomin and Frank M. Spinath},
  journal={Trends in Cognitive Sciences},
  year={2002},
  volume={6},
  pages={169-176}
}

Figures from this paper

Genetics of intelligence

TLDR
An overview of candidate gene associations with intelligence test scores is provided and there is a discussion of whole-genome linkage and association studies, the first of which have only recently appeared.

Generalist Genes and High Cognitive Abilities

TLDR
Investigation of genetic and environmental overlap between web-based tests of general cognitive ability, reading, mathematics and language performance for the top 15% of the distribution using DF extremes analysis finds generalist genes are just as evident at the high extremes of performance as they are for the entire distribution of abilities and for cognitive disabilities.

Genes and cognition.

TLDR
An overview of the methods used and some of the results obtained are provided in an attempt to highlight the multidisciplinary complexity of studying the genetic bases of human cognition.

Genetics and Developmental Psychology

TLDR
The future of genetic research in developmental psychology lies in DNA: Identifying the specific genes responsible for the widespread influence of genetics and using these genes to investigate developmental pathways between genes and behavior.

The genetic and environmental etiologies of the relations between cognitive skills and components of reading ability.

TLDR
A genetic association between children's cognitive ability and reading ability is supported, suggesting that genetic influences involved in general cognitive processing are also important for reading ability.

The heritability of general cognitive ability increases linearly from childhood to young adulthood

TLDR
It is shown for general cognitive ability that, to the contrary, genetic influence increases with age, and this finding suggests new ways of thinking about the interface between nature and nurture during the school years.

The primacy of cognition in schizophrenia.

  • R. Heinrichs
  • Psychology, Medicine
    The American psychologist
  • 2005
TLDR
Cognitive tasks and concepts are used increasingly in schizophrenia science and treatment and chronic stress, genes, brain disturbances, task structure, gender, and sociocultural background may all enhance the sensitivity of cognitive performance to schizophrenia.

"Genes for Intelligence": A Review of Recent Progress

TLDR
This review surveys the results about the molecular genetics of intelligence up to October 2005, including direct association studies of cognitive ability with functional polymorphisms in brain-expressed "candidate genes"; indirect association studies that have identified chromosomal regions in which quantitative trait loci for intelligence appear to be located; and polymorphisms and recent evolutionary trends in two genes that are related to brain size.

A longitudinal genetic analysis of low verbal and nonverbal cognitive abilities in early childhood.

  • T. PriceP. DaleR. Plomin
  • Psychology
    Twin research : the official journal of the International Society for Twin Studies
  • 2004
TLDR
It is concluded that for low ability, as well as for normal variation in ability, genetic "g" emerges during early childhood but is not fully developed until middle childhood.
...

References

SHOWING 1-10 OF 59 REFERENCES

The independent prediction of general intelligence by elementary cognitive tasks: Genetic and environmental influences

TLDR
Results indicate that the general factor, group factors, and specific residuals are necessary when examining additive genetic variance, and common environmental variance can be collapsed into a single general factor.

Genetic and Environmental Influences on Reaction Times: Evidence from Behavior-Genetic Research

Summary This paper reviews the behavior-genetic literature on speed of information processing with special focus on two major issues in this field: (a) the importance of genetic and environmental

Genetic influences on brain structure

TLDR
Detailed three-dimensional maps revealing how brain structure is influenced by individual genetic differences are reported, and may shed light on the heritability of cognitive and linguistic skills, as well as genetic liability for diseases that affect the human cortex.

Reflections on the Concept of Intelligence

Psychometric g and the race question (A.R. Jensen). Race and sex differences in brain size and cognitive ability (J.P. Rushton, C. Davison Ankney). On the comparative generality of g (C. Locurto).

General intelligence and the definition of phenotypes.

TLDR
It is argued that g is actually made of further separable basic cognitive processes and does not represent a single underlying entity, and is integrated into a complex system in the brain that makes them difficult to identify.

Substantial genetic influence on cognitive abilities in twins 80 or more years old.

TLDR
Evidence is provided for the significant influence of idiosyncratic experience as the environmental component that most determines individual differences in cognitive abilities late in life.
...