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A watershed model of individual differences in fluid intelligence.

Publication ,  Journal Article
Kievit, RA; Davis, SW; Griffiths, J; Correia, MM; Cam-Can, ; Henson, RN
Published in: Neuropsychologia
October 2016

Fluid intelligence is a crucial cognitive ability that predicts key life outcomes across the lifespan. Strong empirical links exist between fluid intelligence and processing speed on the one hand, and white matter integrity and processing speed on the other. We propose a watershed model that integrates these three explanatory levels in a principled manner in a single statistical model, with processing speed and white matter figuring as intermediate endophenotypes. We fit this model in a large (N=555) adult lifespan cohort from the Cambridge Centre for Ageing and Neuroscience (Cam-CAN) using multiple measures of processing speed, white matter health and fluid intelligence. The model fit the data well, outperforming competing models and providing evidence for a many-to-one mapping between white matter integrity, processing speed and fluid intelligence. The model can be naturally extended to integrate other cognitive domains, endophenotypes and genotypes.

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Published In

Neuropsychologia

DOI

EISSN

1873-3514

Publication Date

October 2016

Volume

91

Start / End Page

186 / 198

Location

England

Related Subject Headings

  • Young Adult
  • White Matter
  • Reaction Time
  • Models, Psychological
  • Models, Neurological
  • Middle Aged
  • Male
  • Intelligence Tests
  • Intelligence
  • Individuality
 

Citation

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Kievit, R. A., Davis, S. W., Griffiths, J., Correia, M. M., Cam-Can, ., & Henson, R. N. (2016). A watershed model of individual differences in fluid intelligence. Neuropsychologia, 91, 186–198. https://doi.org/10.1016/j.neuropsychologia.2016.08.008
Kievit, Rogier A., Simon W. Davis, John Griffiths, Marta M. Correia, Marta M. Cam-Can, and Richard N. Henson. “A watershed model of individual differences in fluid intelligence.Neuropsychologia 91 (October 2016): 186–98. https://doi.org/10.1016/j.neuropsychologia.2016.08.008.
Kievit RA, Davis SW, Griffiths J, Correia MM, Cam-Can, Henson RN. A watershed model of individual differences in fluid intelligence. Neuropsychologia. 2016 Oct;91:186–98.
Kievit, Rogier A., et al. “A watershed model of individual differences in fluid intelligence.Neuropsychologia, vol. 91, Oct. 2016, pp. 186–98. Pubmed, doi:10.1016/j.neuropsychologia.2016.08.008.
Kievit RA, Davis SW, Griffiths J, Correia MM, Cam-Can, Henson RN. A watershed model of individual differences in fluid intelligence. Neuropsychologia. 2016 Oct;91:186–198.
Journal cover image

Published In

Neuropsychologia

DOI

EISSN

1873-3514

Publication Date

October 2016

Volume

91

Start / End Page

186 / 198

Location

England

Related Subject Headings

  • Young Adult
  • White Matter
  • Reaction Time
  • Models, Psychological
  • Models, Neurological
  • Middle Aged
  • Male
  • Intelligence Tests
  • Intelligence
  • Individuality