Interhemispheric interaction during global-local processing in mathematically gifted adolescents, average-ability youth, and college students.

  title={Interhemispheric interaction during global-local processing in mathematically gifted adolescents, average-ability youth, and college students.},
  author={Harnam Singh and Michael W O'Boyle},
  volume={18 2},
Interhemispheric interaction in mathematically gifted (MG) adolescents, average-ability (AA) youth, and college students (CS) was examined by presenting hierarchical letter pairs in 3 viewing conditions: (a) unilaterally to the right hemisphere (RH), (b) unilaterally to the left hemisphere (LH), or (c) bilaterally, with 1 member of the pair presented to each hemisphere simultaneously. Participants made global-local, match-no-match judgments. For the AA and CS, the LH was faster for local… 

Figures and Tables from this paper

Hemispheric interactions are different in left-handed individuals.

Results demonstrate significant handedness effects, suggesting that left-handed individuals tend to have more efficient hemispheric interactions.

The Development of Global and Local Processing: A Comparison of Children to Adults

In light of the adult model of a hemispheric asymmetry of global and local processing, we compared children (M age = 8.4 years) to adults in a global-local reaction time (RT) paradigm. Hierarchical

A hemispheric division of labor aids mental rotation.

Findings support a current model of hemispheric interactions, which posits that an unequal Hemispheric distribution of cognitive load allows the cerebral hemispheres to take the lead for different aspects of cognitive processing.

Some current findings on brain characteristics of the mathematically gifted adolescent

A number of studies investigating the brain characteristics of mathematically gifted youth indicate that they possess a unique functional organisation as compared to those of average math ability

Efficiency of callosal transfer and hemispheric interaction.

A significant correlation that could not be accounted for by other factors such as functional lateralization, handedness, age, sex, or attention was found between IHTT and hemispheric interaction.

Mathematically Gifted Children: Developmental Brain Characteristics and Their Prognosis for Well-Being

Research in cognitive neuroscience suggests that the brains of mathematically gifted children are quantitatively and qualitatively different from those of average math ability. Math-gifted children

Neuropsychological Characteristics of Academic and Creative Giftedness

Evidence for interpretable neural correlates of giftedness comes from two main lines of enquiry: studies comparing the neural functioning of gifted children with age-matched peers not identified as gifted and studies which compare the neural function and structure of high-IQ adults with those of average IQ.

Enhanced brain connectivity in math-gifted adolescents: An fMRI study using mental rotation

Enhanced connectivity patterns are consistent with previous studies linking increased activation of the frontal and parietal regions with high fluid intelligence, and may be a unique neural characteristic of the mathematically gifted brain.

Neurocognitive mechanisms of mathematical giftedness: A literature review

The theoretical background, empirical studies, and neurocognitive mechanisms of mathematically gifted children/adolescents are reviewed and some potential directions for the future research are identified and discussed.



Sex differences, hemispheric laterality, and associated brain activity in the intellectually gifted

These experiments provide convergent lines of evidence suggesting that enhanced right‐hemisphere involvement during basic information processing, as well as superior coordination and allocation of cortical resources within and between the hemispheres, are unique characteristics of the gifted brain.

Functional MRI of Global and Local Processing in Children

Patterns of functional activation mirror the profiles of RT performance and demonstrate a shift from undifferentiated, bilateral processing toward hemispheric lateralization.

Hemispheric differences in global versus local processing of hierarchical visual stimuli by normal subjects: new data and a meta-analysis of previous studies.

Meta-analytic techniques were used to combine the present results with those from previous studies, and there was evidence that the hypothesized left-hemisphere/local, right- Hemisphere/global specialization does in fact exist.

The cerebral hemispheres cooperate to perform complex but not simple tasks.

This finding suggests that the hemispheres dynamically couple or uncouple their processing as a function of task complexity, and indicates that the degree to which interhemispheric cooperation underlies performance changes with the complexity of the task being performed.

How and why do the two cerebral hemispheres interact?

The data suggest that when both hemispheres have some competence at a difficult task, there is a benefit to interhemispheric interaction and the role of the CC in the dynamic distribution of attention may be particularly relevant to this advantage.