Hemispheric differences in the processing of contextual information during language comprehension. 2015

Bethanie Gouldthorp
a School of Psychology , Murdoch University , Murdoch , WA , Australia.

This study investigated the proposition that the right hemisphere (RH) processes language in a global, integrative manner that maintains access to earlier contextual information, whereas the left hemisphere (LH) processes in a local fashion and only keeps active the most recent concept. Thirty-four right-handed participants completed a lexical decision task using a split visual-field paradigm, with reaction time and error rates recorded. Three sentences were presented, where an inference was required in order to produce coherence between the first and second sentences. The third sentence was not directly related to the inference generation, but was consistent with the scenario set out in the prior context. Targets were either "Global", where the target reflected the meaning of the inference generated in order for coherence to have been created; or "Local", where the target reflected the meaning of only the third sentence and therefore did not require integration of previous context. Significantly greater facilitation was observed for the RH/left visual field than LH/right visual field for "Global" targets, while no hemispheric differences were observed for "Local" targets. This study provides evidence for the distillation of current models of hemispheric language comprehension into underlying local and global processes.

UI MeSH Term Description Entries
D007802 Language A verbal or nonverbal means of communicating ideas or feelings. Dialect,Dialects,Languages
D007839 Functional Laterality Behavioral manifestations of cerebral dominance in which there is preferential use and superior functioning of either the left or the right side, as in the preferred use of the right hand or right foot. Ambidexterity,Behavioral Laterality,Handedness,Laterality of Motor Control,Mirror Writing,Laterality, Behavioral,Laterality, Functional,Mirror Writings,Motor Control Laterality,Writing, Mirror,Writings, Mirror
D008297 Male Males
D010775 Photic Stimulation Investigative technique commonly used during ELECTROENCEPHALOGRAPHY in which a series of bright light flashes or visual patterns are used to elicit brain activity. Stimulation, Photic,Visual Stimulation,Photic Stimulations,Stimulation, Visual,Stimulations, Photic,Stimulations, Visual,Visual Stimulations
D011930 Reaction Time The time from the onset of a stimulus until a response is observed. Response Latency,Response Speed,Response Time,Latency, Response,Reaction Times,Response Latencies,Response Times,Speed, Response,Speeds, Response
D003657 Decision Making The process of making a selective intellectual judgment when presented with several complex alternatives consisting of several variables, and usually defining a course of action or an idea. Credit Assignment,Assignment, Credit,Assignments, Credit,Credit Assignments
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000293 Adolescent A person 13 to 18 years of age. Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults

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