Investigation of Resource Allocation in Persons with Aphasia for AAC-Related Tasks

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dc.contributor.committeeChair Koul , Rajinder en_US
dc.contributor.committeeMember Corwin , Melinda en_US
dc.contributor.committeeMember Dembowski , James en_US
dc.contributor.committeeMember Aoyama , Katsura en_US
dc.contributor.committeeMember O'Boyle , Michael en_US Communication Sciences and Disorders en_US Speech , Language , and Hearing Sciences en_US Texas Tech University en_US Doctor of Philosophy en_US
dc.creator Petroi , Diana 2014 -06 -06T20 :13 :20Z 2012 -02 -16T17 :05 :53Z en_US 2014 -06 -06T20 :13 :20Z 2011 -08 en_US
dc.identifier.uri http : / /hdl .handle .net /2346 /23876 en_US
dc.description.abstract This study investigated resource allocation abilities in persons with aphasia (PWA ) in the presence and absence of competing stimuli across a series of experimental tasks that involved identifying and selecting single symbols and subject -verb -object (SVO ) sentences on a speech generating device (SGD ) . Participants included 10 individuals with Broca’s aphasia and a group of 10 typical individuals matched on assigned variables . A mixed -group design was used to compare the performance of the two groups on single symbol and SVO sentence accuracy and response latency measures . Data were analyzed using a repeated -measures analysis of variance (ANOVA ) . The results revealed that PWA accurately identified significantly (p < .01 ) fewer single symbols and SVO sentences in comparison to matched control participants . Additionally , number of symbols per screen and level of location of symbols had a significant effect (p < .01 ) on accuracy of responses for both groups . Furthermore , there was a significant (p < .05 ) interaction between the listening condition and group variables , indicating that competing stimuli have the potential to slow down the processing of information for PWA . Analysis of response latencies indicated that PWA exhibited longer response latencies across all three listening conditions in contrast to control participants . A significant negative correlation (p < .05 ) was observed between accuracy of responses for the single symbol and SVO sentence tasks and perceptual ratings of task difficulty . In summary , the results of this study indicate that effective and efficient use of SGDs by PWA depends upon several vocabulary organization factors such as the number of symbols on a screen and the specific location of a symbol across several screens . These results suggest that researchers and clinicians may need to consider organizing vocabulary on SGDs in such a manner as to reduce the cognitive demands placed on PWA . en_US
dc.language.iso en _US en_US
dc.publisher Texas Tech University en_US
dc.subject aphasia en_US
dc.subject attention en_US
dc.subject resource allocation /capacity en_US
dc.subject vocabulary organization en_US
dc.subject working memory en_US
dc.title Investigation of Resource Allocation in Persons with Aphasia for AAC -Related Tasks en_US
dc.type Thesis en_US


Investigation of Resource Allocation in Persons with Aphasia for AAC-Related Tasks. Texas Tech University. Available electronically from http : / /hdl .handle .net /2346 /23876 .

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