UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Occipitotemporal Representations Reflect Individual Differences in Conceptual Knowledge

Braunlich, K; Love, BC; (2018) Occipitotemporal Representations Reflect Individual Differences in Conceptual Knowledge. Journal of Experimental Psychology: General 10.1037/xge0000501. (In press). Green open access

[img]
Preview
Text
Braunlich_occipitotemporal representations reflect.pdf - Published version

Download (751kB) | Preview

Abstract

Through selective attention, decision-makers can learn to ignore behaviorally irrelevant stimulus dimensions. This can improve learning and increase the perceptual discriminability of relevant stimulus information. Across cognitive models of categorization, this is typically accomplished through the inclusion of attentional parameters, which provide information about the importance assigned to each stimulus dimension by each participant. The effect of these parameters on psychological representation is often described geometrically, such that perceptual differences over relevant psychological dimensions are accentuated (or stretched), and differences over irrelevant dimensions are down-weighted (or compressed). In sensory and association cortex, representations of stimulus features are known to covary with their behavioral relevance. Although this implies that neural representational space might closely resemble that hypothesized by formal categorization theory, to date, attentional effects in the brain have been demonstrated through powerful experimental manipulations (e.g., contrasts between relevant and irrelevant features). This approach sidesteps the role of idiosyncratic conceptual knowledge in guiding attention to useful information sources. To bridge this divide, we used formal categorization models, which were fit to behavioral data, to make inferences about the concepts and strategies used by individual participants during decision-making. We found that when greater attentional weight was devoted to a particular visual feature (e.g., “color”), its value (e.g., “red”) was more accurately decoded from occipitotemporal cortex. We also found that this effect was sufficiently sensitive to reflect individual differences in conceptual knowledge, indicating that occipitotemporal stimulus representations are embedded within a space closely resembling that formalized by classic categorization theory.

Type: Article
Title: Occipitotemporal Representations Reflect Individual Differences in Conceptual Knowledge
Open access status: An open access version is available from UCL Discovery
DOI: 10.1037/xge0000501
Publisher version: http://dx.doi.org/10.1037/xge0000501
Language: English
Additional information: This article has been published under the terms of the Creative Com-mons Attribution License (http://creativecommons.org/licenses/by/3.0/),which permits unrestricted use, distribution, and reproduction in any me-dium, provided the original author and source are credited. Copyright forthis article is retained by the author(s)
Keywords: concepts; selective attention; occipitotemporal cortex
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Experimental Psychology
URI: https://discovery.ucl.ac.uk/id/eprint/10054387
Downloads since deposit
40Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item