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Brain-intelligence relationships across childhood and adolescence: A latent-variable approach

Published on May 1, 2018in Intelligence2.609
· DOI :10.1016/j.intell.2018.02.006
Francisco J. Román14
Estimated H-index: 14
(UAM: Autonomous University of Madrid),
Daniel Morillo3
Estimated H-index: 3
(UAM: Autonomous University of Madrid)
+ 3 AuthorsRoberto Colom Marañón43
Estimated H-index: 43
(UAM: Autonomous University of Madrid)
Abstract
Abstract The analysis of the relationships between cortical and intellectual development is a complex matter. Greater brain plasticity in brighter individuals has been suggested, but the associations between developmental cortical changes and variations in the general factor of intelligence (g) across time at the latent level have not been addressed. For filling this gap, here we relate longitudinal changes in g with developmental changes in cortical thickness and cortical surface area. One hundred and thirty-two children and adolescents representative of the population from the Pediatric MRI Data Repository completed the Wechsler Abbreviated Scale of Intelligence in three time points and MRI scans were also obtained (mean inter-registration interval ≈ 2 years, age range = 6.1 to 21.3 years). Longitudinal latent variable analyses revealed an increase in g scores amounting to a full standard deviation on average. Intelligence differences estimated at the latent level were significantly correlated related with cortical changes. Older individuals showed greater decrease in cortical values along with smaller increase in intelligence. Furthermore, thickness preservation in brighter individuals was observed at early adolescence (10–14 years).
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References44
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#2Lindsay B. Lewis (McGill University)H-Index: 8
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Abstract Several reports have described cortical thickness (CTh) developmental trajectories, with conflicting results. Some studies have reported inverted-U shape curves with peaks of CTh in late childhood to adolescence, while others suggested predominant monotonic decline after age 6. In this study, we reviewed CTh developmental trajectories in the NIH MRI Study of Normal Brain Development, and in a second step, evaluated the impact of post-processing quality control (QC) procedures on identif...
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Abstract It remains unclear if changes of the cerebral cortex occur gradually from childhood to adulthood, or if adolescence marks a differential period of cortical development. In the current study of 90 healthy volunteers aged 5–32 years (48 females, 85 right handed) with 180 scans (2 scans for each participant with ~ 4 year gaps), thinning of overall mean thickness and across the four major cortical lobes bilaterally was observed across this full age span. However, the thinning rate, calculat...
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#1Francisco J. Román (UAM: Autonomous University of Madrid)H-Index: 14
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Intelligence is composed of a set of cognitive abilities hierarchically organized. General and specific abilities capture distinguishable, but related, facets of the intelligence construct. Here, we analyze gray matter with three morphometric indices (volume, cortical surface area, and cortical thickness) at three levels of the intelligence hierarchy (tests, first-order factors, and a higher-order general factor, g). A group of one hundred and four healthy young adults completed a cognitive batt...
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