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Parafoveal previews and lexical frequency in natural reading: evidence from eye movements and fixation-related potentials

Parafoveal previews and lexical frequency in natural reading: evidence from eye movements and fixation-related potentials
Parafoveal previews and lexical frequency in natural reading: evidence from eye movements and fixation-related potentials
Participants’ eye movements and EEG signal were recorded as they read sentences displayed according to the gaze-contingent boundary paradigm. Two target words in each sentence were manipulated for lexical frequency (high vs. low frequency) and parafoveal preview of each target word (identical vs. string of random letters vs. string of Xs). Eye movement data revealed visual parafoveal-on-foveal effects (POF), as well as foveal visual and orthographic preview effects and word frequency effects. Fixation-related potentials (FRPs) showed visual and orthographic PoF effects as well as foveal visual and orthographic preview effects. Our results replicated the early preview positivity effect (Dimigen et al., 2012) in the X-string preview condition, and revealed different neural correlates associated with a preview comprised of a string of random letters relative to a string of Xs. The former effects seem likely to reflect difficulty associated with the integration of parafoveal and foveal information, as well as feature overlap, while the latter reflect inhibition, and potentially disruption, to processing underlying reading. Interestingly, and consistent with Kretzschmar, Schlesewsky and Staub (2015), no frequency effect was reflected in the FRP measures. The findings provide insight into the neural correlates of parafoveal processing and written word recognition in reading and demonstrate the value of utilising ecologically valid paradigms to study well established phenomena that occur as text is read naturally.
0096-3445
Degno, Federica
98960859-20f9-44be-a0a2-9645a5ebc03e
Loberg, Otto
cdcaccba-67e3-4ef9-bfbb-53818ebc1496
Zang, Chuanli
8634dfd8-e67c-42da-a643-409bb19ed6d8
Zhang, Manman
e8bfd819-07d2-4d3e-8573-28fbd8dd6186
Donnelly, Nick
05c83b6b-ee8d-4c9d-85dc-c5dcd6b5427b
Liversedge, Simon P.
2cc0c5f3-0b3e-464f-b9c1-7736c5f94cf0
Degno, Federica
98960859-20f9-44be-a0a2-9645a5ebc03e
Loberg, Otto
cdcaccba-67e3-4ef9-bfbb-53818ebc1496
Zang, Chuanli
8634dfd8-e67c-42da-a643-409bb19ed6d8
Zhang, Manman
e8bfd819-07d2-4d3e-8573-28fbd8dd6186
Donnelly, Nick
05c83b6b-ee8d-4c9d-85dc-c5dcd6b5427b
Liversedge, Simon P.
2cc0c5f3-0b3e-464f-b9c1-7736c5f94cf0

Degno, Federica, Loberg, Otto, Zang, Chuanli, Zhang, Manman, Donnelly, Nick and Liversedge, Simon P. (2018) Parafoveal previews and lexical frequency in natural reading: evidence from eye movements and fixation-related potentials. Journal of Experimental Psychology: General. (doi:10.1037/xge0000494).

Record type: Article

Abstract

Participants’ eye movements and EEG signal were recorded as they read sentences displayed according to the gaze-contingent boundary paradigm. Two target words in each sentence were manipulated for lexical frequency (high vs. low frequency) and parafoveal preview of each target word (identical vs. string of random letters vs. string of Xs). Eye movement data revealed visual parafoveal-on-foveal effects (POF), as well as foveal visual and orthographic preview effects and word frequency effects. Fixation-related potentials (FRPs) showed visual and orthographic PoF effects as well as foveal visual and orthographic preview effects. Our results replicated the early preview positivity effect (Dimigen et al., 2012) in the X-string preview condition, and revealed different neural correlates associated with a preview comprised of a string of random letters relative to a string of Xs. The former effects seem likely to reflect difficulty associated with the integration of parafoveal and foveal information, as well as feature overlap, while the latter reflect inhibition, and potentially disruption, to processing underlying reading. Interestingly, and consistent with Kretzschmar, Schlesewsky and Staub (2015), no frequency effect was reflected in the FRP measures. The findings provide insight into the neural correlates of parafoveal processing and written word recognition in reading and demonstrate the value of utilising ecologically valid paradigms to study well established phenomena that occur as text is read naturally.

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Degno et al._Parafoveal previews and lexical frequency_prepublication version - Accepted Manuscript
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Accepted/In Press date: 16 July 2018
e-pub ahead of print date: 18 October 2018

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Local EPrints ID: 424239
URI: http://eprints.soton.ac.uk/id/eprint/424239
ISSN: 0096-3445
PURE UUID: b9e88e7e-3f3b-4a2e-b2b8-dd33a7d68866

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Date deposited: 05 Oct 2018 11:35
Last modified: 06 Oct 2020 21:42

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