Relating introspective accuracy to individual differences in brain structure
Stephen M Fleming et al., 2011
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3173849/
Abstract
Our ability to introspect about self-performance is core to human
subjective experience, but the neuroanatomical basis of this ability is
unknown. Such accurate introspection requires discriminating correct
from incorrect decisions, a capacity that varies substantially across
individuals. We dissociated variation in introspective ability from
objective performance in a simple perceptual decision task, allowing us
to determine whether this inter-individual variability was associated
with a distinct neural substrate. We show that introspective ability is
correlated with gray matter volume in anterior prefrontal cortex, a
region which shows striking evolutionary development in humans.
Moreover, inter-individual variability in introspective ability also
correlated with white matter microstructure connected with this area of
prefrontal cortex. Our findings point to a focal neuroanatomical
substrate for introspective ability, a substrate distinct from that
supporting primary perception.
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