In April 2016 Manchester eScholar was replaced by the University of Manchester’s new Research Information Management System, Pure. In the autumn the University’s research outputs will be available to search and browse via a new Research Portal. Until then the University’s full publication record can be accessed via a temporary portal and the old eScholar content is available to search and browse via this archive.

Speed of word retrieval across neurotypical and aphasic participants: An investigation of novel assessment and treatment methods

Sotiropoulou Drosopo, Christina

[Thesis]. Manchester, UK: The University of Manchester; 2016.

Access to files

Abstract

Word finding difficulties (WFD) and slowing down both in linguistic comprehension and production are standard characteristics of people as they grow older. WFD also commonly occur in aphasia and are considered one of the most pervasive symptoms affecting stroke participants’ everyday communication. Research on older adults’ WFD has traditionally focused on production of single words when completing picture naming tasks, while very little is known about how much these WFD can compromise connected speech. Similarly, while picture naming tasks have typically been used for assessing and treating word finding problems in clinical practice, there is a dearth of studies in the aphasiological literature investigating the relationship between confrontation naming and connected speech tasks.The thesis investigated whether a newly-developed method/treatment targeting both speed and accuracy (‘repeated increasingly speeded presentation’ - RISP) in picture naming was more effective in (a) speeding up participants without compromising accuracy, and (b) improving the use of the trained/treated names in connected speech, compared to a standard method/therapy (‘standard presentation’ - SP) which targeted accuracy alone. English-speaking, elderly participants (n=27 at Chapter 3, n= 21 at Chapter 4) and participants with aphasia of varying severity and subtype (n=5 at Chapter 5 and n=20 at Chapter 6) were asked to carry out picture naming tasks/picture naming treatments and composite picture description tasks where the composite pictures included the trained/treated items. As for the neurotypical participants, words which were retrieved more quickly in picture naming tasks were also those which were more readily available and produced in connected speech tasks. Compared to SP, RISP was found to be significantly more effective in significantly reducing picture naming latencies without inducing a speed-accuracy trade-off and with lasting effects. Finally, SP was as effective in promoting retrieval in connected speech as RISP. As for the clinical population, compared to SP, RISP was significantly more effective in improving picture naming accuracy and in maintaining the reduced RTs in the long term. In comparison to the SP, RISP crucially led to significantly higher carry-over of targeted items to connected speech. The thesis findings underlined the effectiveness of a more demanding single word training method/treatment in improving lexical retrieval in confrontation naming for neurotypical participants and in enhancing connected speech for participants with aphasia.

Bibliographic metadata

Type of resource:
Content type:
Form of thesis:
Type of submission:
Degree type:
Doctor of Philosophy
Degree programme:
PhD Psychology
Publication date:
Location:
Manchester, UK
Total pages:
287
Abstract:
Word finding difficulties (WFD) and slowing down both in linguistic comprehension and production are standard characteristics of people as they grow older. WFD also commonly occur in aphasia and are considered one of the most pervasive symptoms affecting stroke participants’ everyday communication. Research on older adults’ WFD has traditionally focused on production of single words when completing picture naming tasks, while very little is known about how much these WFD can compromise connected speech. Similarly, while picture naming tasks have typically been used for assessing and treating word finding problems in clinical practice, there is a dearth of studies in the aphasiological literature investigating the relationship between confrontation naming and connected speech tasks.The thesis investigated whether a newly-developed method/treatment targeting both speed and accuracy (‘repeated increasingly speeded presentation’ - RISP) in picture naming was more effective in (a) speeding up participants without compromising accuracy, and (b) improving the use of the trained/treated names in connected speech, compared to a standard method/therapy (‘standard presentation’ - SP) which targeted accuracy alone. English-speaking, elderly participants (n=27 at Chapter 3, n= 21 at Chapter 4) and participants with aphasia of varying severity and subtype (n=5 at Chapter 5 and n=20 at Chapter 6) were asked to carry out picture naming tasks/picture naming treatments and composite picture description tasks where the composite pictures included the trained/treated items. As for the neurotypical participants, words which were retrieved more quickly in picture naming tasks were also those which were more readily available and produced in connected speech tasks. Compared to SP, RISP was found to be significantly more effective in significantly reducing picture naming latencies without inducing a speed-accuracy trade-off and with lasting effects. Finally, SP was as effective in promoting retrieval in connected speech as RISP. As for the clinical population, compared to SP, RISP was significantly more effective in improving picture naming accuracy and in maintaining the reduced RTs in the long term. In comparison to the SP, RISP crucially led to significantly higher carry-over of targeted items to connected speech. The thesis findings underlined the effectiveness of a more demanding single word training method/treatment in improving lexical retrieval in confrontation naming for neurotypical participants and in enhancing connected speech for participants with aphasia.
Additional digital content not deposited electronically:
N/A
Non-digital content not deposited electronically:
N/A
Thesis main supervisor(s):
Thesis co-supervisor(s):
Language:
en

Institutional metadata

University researcher(s):

Record metadata

Manchester eScholar ID:
uk-ac-man-scw:301015
Created by:
Sotiropoulou Drosopo, Christina
Created:
23rd May, 2016, 16:01:34
Last modified by:
Sotiropoulou Drosopo, Christina
Last modified:
26th May, 2016, 09:30:37

Can we help?

The library chat service will be available from 11am-3pm Monday to Friday (excluding Bank Holidays). You can also email your enquiry to us.