Brain area necessary for fluidintelligence identified uclnews
We found no evidence of such non-frontal causal dependence on APM performance. It is possible that functional imaging findings merely reflect a correlation between fluid intelligence and posterior areas non-critically engaged by the necessary perceptual input.investigated 80 patients with cortical lesions with a fluid intelligence task .
Our findings of greater involvement of the right frontal lobe in APM performance were complemented and extended by our neuroimaging analyses. Both conventional network statistics and non-parametric Bayesian stochastic block modelling heavily implicated the right frontal lobe.
Standard PLSM analyses, potentially confounded by lesion co-occurrence effects, suggested that poorer performance was associated with damage to a right frontal network including posterior middle frontal gyrus, pars opercularis, precentral gyrus, superior corona radiata and external capsule, invariantly to the degree of MD involvement.
Behaviourally we found a highly significant interaction between item difficulty and frontal lesion lateralisation. The asymmetry in performance was nearly three times greater for the middle than for the highest level of difficulty, with neither population nearing the ceiling or floor. Why might that be?
While complete agreement is lacking, factor analyses of progressive matrices indicate at least two material components. Dillon
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