Hemispheric asymmetries in word recognition as revealed by the orthographic uniqueness point effect.
The orthographic uniqueness point (OUP) refers to the first letter of a word that, reading from left to right, makes the word unique. It has recently been proposed that OUPs might be relevant in word recognition and their influence could inform the long-lasting debate of whether - and to what extent - printed words are recognized serially or in parallel. The present study represents the first investigation of the neural and behavioral effects of OUP on visual word recognition. Behaviourally, late OUP words were identified faster and more accurately in a lexical decision task. Analysis of event-related potentials demonstrated a hemispheric asymmetry on the N170 component, with the left hemisphere appearing to be more sensitive to the position of the OUP within a word than the right hemisphere. These results suggest that processing of centrally presented words is likely to occur in a partially parallel manner, as an ends-in scanning process.
Department of Psychology, Swansea University Swansea, UK.
Cristina
C
Izura
Department of Psychology, Aberystwyth University Aberystwyth, UK.
Victoria C
VC
Wright
Department of Psychology, Swansea University Swansea, UK.
Nathalie
N
Fouquet
N170; cerebral hemispheres; event-related potential; orthographic uniqueness point; serial/parallel processing; visual word recognition