Abstract
Differences in how the right and left hemispheres (RH, LH) apprehend visual words were examined using event-related potentials (ERPs) in a repetition paradigm with visual half-field (VF) presentation. In both hemispheres (RH/LVF, LH/RVF), initial presentation of items elicited similar and typical effects of orthographic neighborhood size, with larger N400s for orthographically regular items (words and pseudowords) than for irregular items (acronyms and meaningless illegal strings). However, hemispheric differences emerged on repetition effects. When items were repeated in the LH/RVF, orthographically regular items, relative to irregular items, elicited larger repetition effects on both the N250, a component reflecting processing at the level of visual form (orthography), and on the N400, which has been linked to semantic access. In contrast, in the RH/LVF, repetition effects were biased toward irregular items on the N250 and were similar in size across item types for the N400. The results suggest that processing in the LH is more strongly affected by wordform regularity than in the RH, either due to enhanced processing of familiar orthographic patterns or due to the fact that regular forms can be more readily mapped onto phonology.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 230-239 |
| Number of pages | 10 |
| Journal | Neuropsychologia |
| Volume | 64 |
| DOIs | |
| State | Published - Nov 1 2014 |
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Keywords
- Cerebral hemispheres
- ERPs
- N400
- Orthographic neighborhood
- Visual word recognition
ASJC Scopus subject areas
- Experimental and Cognitive Psychology
- Cognitive Neuroscience
- Behavioral Neuroscience
Cite this
Hemispheric differences in orthographic and semantic processing as revealed by event-related potentials. / Dickson, Danielle S.; Federmeier, Kara D.
In: Neuropsychologia, Vol. 64, 01.11.2014, p. 230-239.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hemispheric differences in orthographic and semantic processing as revealed by event-related potentials
AU - Dickson, Danielle S.
AU - Federmeier, Kara D.
PY - 2014/11/1
Y1 - 2014/11/1
N2 - Differences in how the right and left hemispheres (RH, LH) apprehend visual words were examined using event-related potentials (ERPs) in a repetition paradigm with visual half-field (VF) presentation. In both hemispheres (RH/LVF, LH/RVF), initial presentation of items elicited similar and typical effects of orthographic neighborhood size, with larger N400s for orthographically regular items (words and pseudowords) than for irregular items (acronyms and meaningless illegal strings). However, hemispheric differences emerged on repetition effects. When items were repeated in the LH/RVF, orthographically regular items, relative to irregular items, elicited larger repetition effects on both the N250, a component reflecting processing at the level of visual form (orthography), and on the N400, which has been linked to semantic access. In contrast, in the RH/LVF, repetition effects were biased toward irregular items on the N250 and were similar in size across item types for the N400. The results suggest that processing in the LH is more strongly affected by wordform regularity than in the RH, either due to enhanced processing of familiar orthographic patterns or due to the fact that regular forms can be more readily mapped onto phonology.
AB - Differences in how the right and left hemispheres (RH, LH) apprehend visual words were examined using event-related potentials (ERPs) in a repetition paradigm with visual half-field (VF) presentation. In both hemispheres (RH/LVF, LH/RVF), initial presentation of items elicited similar and typical effects of orthographic neighborhood size, with larger N400s for orthographically regular items (words and pseudowords) than for irregular items (acronyms and meaningless illegal strings). However, hemispheric differences emerged on repetition effects. When items were repeated in the LH/RVF, orthographically regular items, relative to irregular items, elicited larger repetition effects on both the N250, a component reflecting processing at the level of visual form (orthography), and on the N400, which has been linked to semantic access. In contrast, in the RH/LVF, repetition effects were biased toward irregular items on the N250 and were similar in size across item types for the N400. The results suggest that processing in the LH is more strongly affected by wordform regularity than in the RH, either due to enhanced processing of familiar orthographic patterns or due to the fact that regular forms can be more readily mapped onto phonology.
KW - Cerebral hemispheres
KW - ERPs
KW - N400
KW - Orthographic neighborhood
KW - Visual word recognition
UR - http://www.scopus.com/inward/record.url?scp=84907954938&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84907954938&partnerID=8YFLogxK
U2 - 10.1016/j.neuropsychologia.2014.09.037
DO - 10.1016/j.neuropsychologia.2014.09.037
M3 - Article
C2 - 25278134
AN - SCOPUS:84907954938
VL - 64
SP - 230
EP - 239
JO - Neuropsychologia
JF - Neuropsychologia
SN - 0028-3932
ER -