- Title Information
- Title
- The Neural Basis of Competition in Auditory Word Recognition and Spoken Word Production
- Name:
Personal
- Name Part
- Righi, Giulia
- Role
- Role Term:
Text
- creator
- Origin Information
- Copyright Date
(keyDate="yes", encoding="w3cdtf")
- 2009
- Physical Description
- Extent
- x, 138 p.
- digitalOrigin
- born digital
- Note
- Thesis (Ph.D.) -- Brown University (2010)
- Name:
Personal
- Name Part
- Blumstein, Sheila
- Role
- Role Term:
Text
- director
- Name:
Personal
- Name Part
- Tarr, Michael
- Role
- Role Term:
Text
- reader
- Name:
Personal
- Name Part
- Badre, David
- Role
- Role Term:
Text
- reader
- Name:
Corporate
- Name Part
- Brown University. Cognitive and Linguistic Sciences: Cognitive Sciences
- Role
- Role Term:
Text
- sponsor
- Genre (aat)
- theses
- Abstract
- This dissertation examines how brain regions respond to different types of competition during word comprehension and word production. A series of three studies attempted to enhance
the current understanding of which brain regions are sensitive to different aspects of competition and how the nature of the stimuli and the context in which they occur can modulate their
recruitment. Experiment 1 used a combined eye tracking and fMRI paradigm to study the neural basis of phonological competition during word comprehension. Experiment 2 also used a combined eye
tracking and fMRI paradigm to study whether neural structures that were sensitive to the competition created by overtly presenting phonological onset competitors also responded to mediated
phonological competition, i.e. competition in the absence of direct competitors in the visual array. While Experiments 1 and 2 focused on competition during word comprehension, Experiment 3
investigated the neural structures recruited by different types of competition (semantic, phonological, mediated semantic and phonological) during word production using the
picture-word-interference task in fMRI. Overall, all three studies showed that competition during both word comprehension and word production recruits a similar network of areas in the posterior
tempo-parietal and prefrontal cortices, mostly left-lateralized. Of particular interest was the role of the inferior frontal gyrus under conditions of competition. The present experiments
confirm the role of this region as a selection mechanism under conditions of competition, and showed that this region responds to competition across linguistic domains and also to both direct
and mediated types of competition. Moreover, the present results provide further support for the functional heterogeneity of the left IFG. More specifically, BA 44 responded to competition
created only by manipulating phonological factors. BA 47 responded to competition created by both phonological and semantic factors, but critically this domain-general response was achieved only
when the experimental task required selection among conceptual representations, as it was the case for both experiments 1 and 2. BA 45 showed increased activation across all conditions of
competition, regardless of task and of response type.
- Subject (Local)
- Topic
- language processing
- Subject (Local)
- Topic
- inferior frontal gyrus
- Subject (Local)
- Topic
- fMRI
- Subject (FAST)
(authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/871464")
- Topic
- Competition
- Record Information
- Record Content Source (marcorg)
- RPB
- Record Creation Date
(encoding="iso8601")
- 20091218
- Language
- Language Term:
Code (ISO639-2B)
- eng
- Language Term:
Text
- English
- Identifier:
DOI
- 10.7301/Z0QZ288W
- Access Condition:
rights statement
(href="http://rightsstatements.org/vocab/InC/1.0/")
- In Copyright
- Access Condition:
restriction on access
- Collection is open for research.
- Type of Resource (primo)
- dissertations