Abstract：
:Learning about visual object categories causes changes in the way we perceive those objects. One likely mechanism by which this occurs is the application of attention to potentially relevant objects. Here we test the hypothesis that category membership influences the allocation of attention, allowing attention to be applied not only to object features, but to entire categories. Participants briefly learned to categorize a set of novel cartoon animals after which EEG was recorded while participants distinguished between a target and non-target category. A second identical EEG session was conducted after two sessions of categorization practice. The category structure and task design allowed parametric manipulation of number of target features while holding feature frequency and category membership constant. We found no evidence that category membership influenced attentional selection: a postero-lateral negative component, labeled the selection negativity/N250, increased over time and was sensitive to number of target features, not target categories. In contrast, the right hemisphere N170 was not sensitive to target features. The P300 appeared sensitive to category in the first session, but showed a graded sensitivity to number of target features in the second session, possibly suggesting a transition from rule-based to similarity based categorization.
journal_name
Neuropsychologiajournal_title
Neuropsychologiaauthors
Folstein JR,Fuller K,Howard D,DePatie Tdoi
10.1016/j.neuropsychologia.2017.07.025subject
Has Abstractpub_date
2017-09-01 00:00:00pages
18-30eissn
0028-3932issn
1873-3514pii
S0028-3932(17)30278-6journal_volume
104pub_type
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