{"pk":27325,"title":"Categorical vs Coordinate Relationships do not reduce to spatial frequencydifferences","subtitle":null,"abstract":"Categorical and coordinate stimulus processing were hypoth-esized by Kosslyn (1987) to be lateralized visual tasks, dif-ferentiated by task-relevant spatial frequencies. Slotnick et al.(2001) directly tested Kosslyn’s hypothesis and concluded thatthe lateralization presents only when tasks are sufficiently dif-ficult. Our differential encoding model is a three layer neuralnetwork that accounts for lateralization in visual processingvia the biologically plausible mechanism of differences in con-nection spread of long-range lateral neural connections (Hsiao,Cipollini, & Cottrell, 2013). We show that our model accountsfor Slotnick’s data and that Slotnick’s analysis does not con-vincingly explain their results. Instead, we propose that Koss-lyn’s initial hypothesis was based on an incorrect assumption:categorical and coordinate stimuli are not solely differentiatedby spatial frequencies. The results that our model capturescannot be reproduced by Ivry and Robertson’s (1998) Dou-ble Filtering by Frequency theory, which is driven solely bylateralized spatial frequency processing.","language":"eng","license":{"name":"","short_name":"","text":null,"url":""},"keywords":[{"word":"Differential encoding; hemispheric asymmetry;spatial frequency processing; categorical vs. coordinate"}],"section":"Posters: Papers","is_remote":true,"remote_url":"https://escholarship.org/uc/item/3rw2w5xb","frozenauthors":[{"first_name":"Vishaal","middle_name":"","last_name":"Prasad","name_suffix":"","institution":"University of California, San Diego","department":""},{"first_name":"Ben","middle_name":"","last_name":"Cipollini","name_suffix":"","institution":"Classy.org","department":""},{"first_name":"Garrison","middle_name":"W.","last_name":"Cottrell","name_suffix":"","institution":"University of California, San Diego","department":""}],"date_submitted":null,"date_accepted":null,"date_published":"2017-01-01T10:00:00-08:00","render_galley":null,"galleys":[{"label":"PDF","type":"pdf","path":"https://journalpub.escholarship.org/cognitivesciencesociety/article/27325/galley/16961/download/"}]}