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Morphological therapy protocol Open Access


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Type of item
Degree grantor
University of Alberta
Author or creator
Nault, Karin
Supervisor and department
Baayen, Harald (Linguistics)
Libben, Gary (Linguistics)
Examining committee member and department
Rochon, Elizabeth (Speech-Language Pathology)
Parrila, Rauno (Educational Psychology)
Bolger, Patrick (Linguistics)
Beck, David (Linguistics)
Hopper, Tammy (Speech Pathology and Audiology)
Department of Linguistics

Date accepted
Graduation date
Doctor of Philosophy
Degree level
Investigations of morphological impairment in aphasia have revealed that patients may retain knowledge of a word’s morphological status even when they cannot access that word (Delazer & Semenza, 1998). In addition, aphasiological investigations have shown that more errors are produced with multimorphemic words than with monomorphemic words (e.g., Nasti & Marangolo, 2005). This points to the fact that even though individuals with aphasia seem to have retained sensitivity to morphological status and morphological structure of words, they are unable to process morphologically complex words with ease. The goal of this thesis was to investigate whether a therapy that focuses on morphology, the Morphological Therapy Protocol (MTP), will improve the processing of multimorphemic words in these patients. The MTP provides morphological training with four tasks administered sequentially in intense one-hour treatments over a period of only twelve days. Therapy effectiveness was measured by analyzing pre-therapy and post-therapy reading-aloud accuracy scores. The analyses of four patients’ accuracy scores show significant reading-aloud improvement with therapy across trained and untrained words (trained words: p < 0.0001, control words: p < 0.04, new words: p <0.0001). In addition, the therapy effect was maintained over a three-month post-therapy maintenance period. The results of the MTP administration confirm that the notion of morphological constituents is important and that these constituents are involved in the processing of morphologically complex words.
License granted by Karin Nault ( on 2010-04-15T17:29:16Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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