Effects of verb meaning on lexical integration in agrammatic aphasia

Evidence from eyetracking

Jennifer E Mack*, Woohyuk Ji, Cynthia K Thompson

*Corresponding author for this work

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Relatively little is known about the time course of access to the lexical representations of verbs in agrammatic aphasia and its effects on the prediction and integration of the verb's arguments. The present study used visual-world eyetracking to test whether verb meaning can be used by agrammatic aphasic individuals to predict and facilitate theintegration of a subsequent noun argument. Nine adults with agrammatic aphasia and ten age-matched controls participated in the study. In Experiment 1, participants viewed arrays of four objects (e.g.,jar, plate, stick, pencil) while listening to sentences containing either a restrictive verb that was semantically compatible only with the target object or an unrestrictive verb compatible with all four objects (e.g., Susan will open/break the jar). For both participant groups, the restrictive condition elicited more fixations to the target object immediately after the verb. Experiment 2 differed from Experiment 1 in that the auditory sentences presented were incomplete (e.g., Susan will open/break the. .). For controls, restrictive verbs elicited more target fixations immediately after the verb; however, the effects of verb type were noted downstream from the verb for the aphasic listeners. The results suggest that individuals with agrammatic aphasia have preserved ability to use verb information to facilitate integration of overt arguments, but prediction of upcoming arguments is impaired. Impaired lexical-semantic prediction processes may be caused by damage to the left inferior frontal gyrus, which has been argued to support higher-level lexical processes.

Original languageEnglish (US)
Pages (from-to)619-636
Number of pages18
JournalJournal of Neurolinguistics
Volume26
Issue number6
DOIs
StatePublished - Nov 1 2013

Fingerprint

Aphasia
speech disorder
evidence
experiment
Prefrontal Cortex
Semantics
listener
damages
semantics
Verb Meaning
Verbs
Agrammatic Aphasia
ability
Group

Keywords

  • Agrammatic aphasia
  • Eyetracking
  • Lexical-semantic processing
  • Prediction
  • Verb processing

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Arts and Humanities (miscellaneous)
  • Linguistics and Language
  • Cognitive Neuroscience

Cite this

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title = "Effects of verb meaning on lexical integration in agrammatic aphasia: Evidence from eyetracking",
abstract = "Relatively little is known about the time course of access to the lexical representations of verbs in agrammatic aphasia and its effects on the prediction and integration of the verb's arguments. The present study used visual-world eyetracking to test whether verb meaning can be used by agrammatic aphasic individuals to predict and facilitate theintegration of a subsequent noun argument. Nine adults with agrammatic aphasia and ten age-matched controls participated in the study. In Experiment 1, participants viewed arrays of four objects (e.g.,jar, plate, stick, pencil) while listening to sentences containing either a restrictive verb that was semantically compatible only with the target object or an unrestrictive verb compatible with all four objects (e.g., Susan will open/break the jar). For both participant groups, the restrictive condition elicited more fixations to the target object immediately after the verb. Experiment 2 differed from Experiment 1 in that the auditory sentences presented were incomplete (e.g., Susan will open/break the. .). For controls, restrictive verbs elicited more target fixations immediately after the verb; however, the effects of verb type were noted downstream from the verb for the aphasic listeners. The results suggest that individuals with agrammatic aphasia have preserved ability to use verb information to facilitate integration of overt arguments, but prediction of upcoming arguments is impaired. Impaired lexical-semantic prediction processes may be caused by damage to the left inferior frontal gyrus, which has been argued to support higher-level lexical processes.",
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Effects of verb meaning on lexical integration in agrammatic aphasia : Evidence from eyetracking. / Mack, Jennifer E; Ji, Woohyuk; Thompson, Cynthia K.

In: Journal of Neurolinguistics, Vol. 26, No. 6, 01.11.2013, p. 619-636.

Research output: Contribution to journalArticle

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