Neural mechanisms of general fluid intelligence

@article{Gray2003NeuralMO,
  title={Neural mechanisms of general fluid intelligence},
  author={Jeremy R. Gray and Christopher F. Chabris and Todd Samuel Braver},
  journal={Nature Neuroscience},
  year={2003},
  volume={6},
  pages={316-322}
}
We used an individual-differences approach to test whether general fluid intelligence (gF) is mediated by brain regions that support attentional (executive) control, including subregions of the prefrontal cortex. Forty-eight participants first completed a standard measure of gF (Raven's Advanced Progressive Matrices). They then performed verbal and nonverbal versions of a challenging working-memory task (three-back) while their brain activity was measured using functional magnetic resonance… 

Figures, Tables, and Topics from this paper

Neural mechanisms of interference control underlie the relationship between fluid intelligence and working memory span.
TLDR
Path analyses indicate that interference control activity may affect gF through a common set of processes that also influence WM span, and suggest that individual differences in interference-control mechanisms are important for understanding the relationship between gF and WM span.
Comparing brain activations associated with working memory and fluid intelligence
Working memory (WM) and fluid intelligence (Gf) are thought to be highly related, though psychometrically distinct cognitive constructs. Both are important in a wide range of cognitively demanding
Affective personality differences in neural processing efficiency confirmed using fMRI
TLDR
The results reveal the high specificity of the relationships among personality, cognition, and brain activity and confirm that affective dimensions of personality are independent of intelligence, yet also suggest that they might be interrelated in subtle ways, because they modulate activity in overlapping brain regions that appear to be critical for task performance.
Electrophysiological indices of interference resolution covary with individual fluid intelligence: investigating reactive control processes in a 3-back working memory task
TLDR
The findings suggest that high-gf participants may rely upon effective engagement and modulation of attention resources to face interference, as well as the effects of the individual variation in gf.
Activity in the fronto-parietal multiple-demand network is robustly associated with individual differences in working memory and fluid intelligence
TLDR
It is demonstrated that a core component of individual differences variance in executive abilities and fluid intelligence is selectively and robustly positively associated with the level of activity in the MD network, a result that aligns well with lesion studies.
Activity in the Fronto-Parietal Multiple-Demand Network is Robustly Associated with Individual Differences in Working Memory and Fluid Intelligence
TLDR
It is demonstrated that a core component of individual differences variance in executive abilities and fluid intelligence is selectively and robustly positively associated with the level of activity in the MD network, a result that aligns well with lesion studies.
Brain networks for working memory and factors of intelligence assessed in males and females with fMRI and DTI
Abstract Neuro-imaging studies of intelligence implicate the importance of a parietal–frontal network. One unresolved issue is whether this network underlies a general factor of intelligence (g) or
IQ-Related fMRI Differences during Cognitive Set Shifting
TLDR
This event-related functional magnetic resonance imaging study compared neural correlates of executive function (cognitive set-shifting) in 28 healthy participants with either high (HIQ) or average (AIQ) intelligence to show that caution must be exercised when drawing conclusions from differences in activation between groups of individuals in whom IQ may differ.
Recruitment of Neural Mechanisms Supporting Fluid Intelligence
Fluid intelligence (gf) influences performance across many cognitive domains. It is affected by both genetic and environmental factors. Tasks tapping gf activate a network of brain regions including
Functional roles of the cingulo-frontal network in performance on working memory
TLDR
It is concluded that central executive functioning for attention shifting is modulated by the cingulo-frontal network.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 59 REFERENCES
Neural Substrates of Fluid Reasoning: An fMRI Study of Neocortical Activation during Performance of the Raven's Progressive Matrices Test
TLDR
Brain activation, as measured by functional magnetic resonance imaging, during problem solving in seven young, healthy participants is examined to suggest that fluid reasoning is mediated by a composite of working memory systems.
A Parametric Study of Prefrontal Cortex Involvement in Human Working Memory
TLDR
Functional magnetic resonance imaging is used to probe PFC activity during a sequential letter task in which memory load was varied in an incremental fashion, providing a "dose-response curve" describing the involvement of both PFC and related brain regions in WM function.
Effects of domain-specific interference on brain activation associated with verbal working memory task performance.
  • O. Gruber
  • Medicine, Psychology
    Cerebral cortex
  • 2001
TLDR
The results of the present functional magnetic resonance imaging study suggest that phonological storage may be a function of a complex prefronto-parietal network, and not localized in only one, parietal brain region.
The neural substrate and temporal dynamics of interference effects in working memory as revealed by event-related functional MRI.
TLDR
Using event-related functional MRI, spatially and temporally a proactive interference effect is characterized that may reflect the operation of a PFC-mediated response-inhibition mechanism that contributes to working memory performance.
Personality predicts working-memory—related activation in the caudal anterior cingulate cortex
  • J. Gray, T. Braver
  • Psychology, Medicine
    Cognitive, affective & behavioral neuroscience
  • 2002
TLDR
The data bolster approach-withdrawal (action control) theories of personality and suggest refinements to the dominant views of ACC and personality.
Dissociating the role of the dorsolateral prefrontal and anterior cingulate cortex in cognitive control.
TLDR
Event-related functional magnetic resonance imaging and a task-switching version of the Stroop task were used to examine whether these components of cognitive control have distinct neural bases in the human brain and a double dissociation was found.
The role of the anterior prefrontal cortex in human cognition
TLDR
The results indicate that the fronto-polar prefrontal cortex selectively mediates the human ability to hold in mind goals while exploring and processing secondary goals, a process generally required in planning and reasoning.
The role of prefrontal cortex in working-memory capacity, executive attention, and general fluid intelligence: An individual-differences perspective
TLDR
Although the dorsolateral PFC is but one critical structure in a network of anterior and posterior “attention control” areas, it does have a unique executiveattention role in actively maintaining access to stimulus representations and goals in interference-rich contexts.
Integration of emotion and cognition in the lateral prefrontal cortex
  • J. Gray, T. Braver, M. Raichle
  • Psychology, Medicine
    Proceedings of the National Academy of Sciences of the United States of America
  • 2002
TLDR
Task-related neural activity in bilateral PFC showed a predicted pattern: an Emotion × Stimulus crossover interaction, with no main effects, with activity predicting task performance, indicating that emotion and higher cognition can be truly integrated.
Inhibition in verbal working memory revealed by brain activation.
TLDR
Behavioral evidence is provided of a verbal working memory task that, by hypothesis, engaged inhibitory processing, and it is shown that the inhibitoryprocessing is associated with a lateral portion of the left prefrontal cortex.
...
1
2
3
4
5
...