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

Show simple item record


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
dc.degree.department Communication Sciences and Disorders en_US
dc.degree.discipline Speech , Language , and Hearing Sciences en_US
dc.degree.grantor Texas Tech University en_US
dc.degree.level Doctor of Philosophy en_US
dc.creator Petroi , Diana
dc.date.accessioned 2014 -06 -06T20 :13 :20Z
dc.date.available 2012 -02 -16T17 :05 :53Z en_US
dc.date.available 2014 -06 -06T20 :13 :20Z
dc.date.issued 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

Citation

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

Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search DSpace

Advanced Search

Browse