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Abstract:
Abstract: Recent studies of hemispheric differences in
language processing (Koivisto, 1998) have suggested some previous
results (Chiarello, et al., 1990, 1992) may be attributed to
post-lexical processing by the right hemisphere due to the use of
the yes-no lexical decision response task. Yet there has been no
direct examination of response task differences in a divided visual
field priming paradigm. Here the yes-no lexical decision task was
directly compared to the go no-go task under two conditions.
Experiment 1 (n=56, stimulus onset asynchrony (SOA)=300 ms) used
associated category members as stimuli (DOCTOR-NURSE) and
Experiment 2 (n=56, SOA=510 ms) used non-associated category
members as stimuli (DEER-PONY). Priming did not vary with response
task in either experiment. Go no-go produced significantly faster
reaction times in both experiments, but there was no evidence
supporting suggestions (Koivisto, 1998) that the yes-no response
task allows post-lexical processing for either hemisphere. Priming
did not interact with task for either stimulus relationship or SOA.
Automatic processes by both hemispheres are supported in Experiment
1. Either automatic or controlled processes may be responsible for
the priming effects in Experiment 2, given the longer SOA,
supporting the findings of Chiarello et al., (1992).
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