Morphophonological structure and agrammatic regular/irregular past-tense production

Fix, Steve; Thompson, Cynthia K.

doi:10.1016/j.bandl.2006.06.092

Cited by 9 publications

(3 citation statements)

References 7 publications

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“…Crosslinguistically, sentence production difficulty in agrammatism is often characterized by exceptional difficulty producing certain types of morphosyntactic structures, such as tense marking, relative to other structures, such as agreement and mood marking (e.g., in English [ 10 – 13 ]; in Hebrew [ 14 ]; in German [ 15 ]; but see conflicting results in [ 16 ]; in Spanish [ 17 , 18 ]; in Dutch [ 19 , 20 ]; and in Greek [ 21 – 23 ]). The crosslinguistic data also demonstrate that the tense disadvantage occurs even when morphological complexity of the verb, such as affixation and additional free grammatical morphemes, is held constant [ 12 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Production of Verb Tense in Agrammatic Aphasia: A Meta-Analysis and Further Data

Faroqi‐Shah

Friedman

2015

Behavioural Neurology

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In a majority of languages, the time of an event is expressed by marking tense on the verb. There is substantial evidence that the production of verb tense in sentences is more severely impaired than other functional categories in persons with agrammatic aphasia. The underlying source of this verb tense impairment is less clear, particularly in terms of the relative contribution of conceptual-semantic and processing demands. This study aimed to provide a more precise characterization of verb tense impairment by examining if there is dissociation within tenses (due to conceptual-semantic differences) and an effect of experimental task (mediated by processing limitations). Two sources of data were used: a meta-analysis of published research (which yielded 143 datasets) and new data from 16 persons with agrammatic aphasia. Tensed verbs were significantly more impaired than neutral (nonfinite) verbs, but there were no consistent differences between past, present, and future tenses. Overall, tense accuracy was mediated by task, such that picture description task was the most challenging, relative to sentence completion, sentence production priming, and grammaticality judgment. An interaction between task and tense revealed a past tense disadvantage for a sentence production priming task. These findings indicate that verb tense impairment is exacerbated by processing demands of the elicitation task and the conceptual-semantic differences between tenses are too subtle to show differential performance in agrammatism.

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Section: Introductionmentioning

confidence: 99%

Production of Verb Tense in Agrammatic Aphasia: A Meta-Analysis and Further Data

Faroqi‐Shah

Friedman

2015

Behavioural Neurology

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“…Morphological impairment studies that examine morphophonological patterns beyond the regular/irregular distinction have generally examined very broad categories (e.g. comparing ± vowel change and ± affixation [Fix & Thompson, 2006] or comparing words from highand low-density morphophonological neighbourhoods [Harris & Humphreys, 2015]) as opposed to individual morphophonological patterns.…”

Section: Introductionmentioning

confidence: 99%

The impact of morphophonological patterns on verb production: evidence from acquired morphological impairment

Rimikis

Buchwald

2018

Clinical Linguistics & Phonetics

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Although much of the research on morphology and aphasia has focused specifically on the distinction between regular and irregular verb production, individuals with aphasia often present with differences in performance within these categories. While these within-category differences are relatively understudied, they have the potential to inform our understanding of the morphological processing system and treatment protocols for morphological impairment. The present study examines how morphophonological patterns in English impact past-tense production within the categories of regular and irregular verbs based on errors of an individual with acquired morphological impairment. Acquired morphological impairment was demonstrated by performance on two reading tasks. First, the individual produced more final consonant deletion errors in morphologically complex words (prays→[pre]) compared to homophones (praise→[pre]). Second, morphological deletion errors were found to occur at comparable rates for inflected regular verbs (sinned→sin) and inflected irregular verbs (won→win), whereas the analogous error (e.g. ton→tin) never occurred on the monomorphemic pairs. In order to examine differences within each category, we used a past-tense elicitation task designed to analyse the effect of differences in morphophonological pattern frequency on accuracy and error patterns in production. We found production of both regular and irregular verbs was affected by the extent to which different morphophonological patterns are supported in the language (i.e. the number of phonologically similar words within the lexicon which take the same inflectional change). These results provide evidence that morphophonological patterns are encoded in a way that impact morphological production, a finding which has both clinical and theoretical implications.

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“…Finally, there are a variety of theories that focus on syntactic (sentential) formulation (Burchert, Swoboda-Moll, & deBlesser, 2005; Faroqi-Shah & Thompson, 2007; Friedmann & Grodzinsky, 1997; Kegl, 1995; Wenzlaff & Clahsen, 2004). Although the various syntactic accounts differ in specifics, most are unable to account for errors in single word production or task-related performance differences (see Fix & Thompson, 2006; Kok, van Doorn, & Kolk, 2007). …”

Section: Introductionmentioning

confidence: 99%

Production latencies of morphologically simple and complex verbs in aphasia

Faroqi‐Shah

Thompson

2010

Clinical Linguistics & Phonetics

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There are several accounts of why some individuals with post-stroke aphasia experience difficulty in producing morphologically complex verbs. Although a majority of these individuals also produce syntactically flawed utterances, at least two accounts focus on word-level encoding operations. One account proposes a difficulty with rule-governed affixation, predicting that verbs without affixes (stems and irregular past) should be produced with ease. The second account emphasises the contribution of phonological encoding, noting that morphological complexity is often confounded by phonological complexity. The present study investigated the effect of morphological complexity (presence vs. absence of affixes) on verb production when phonological complexity and lexical frequency was controlled. A novel delayed repetition paradigm was used, accuracy and latency of production were the dependent measures. Data from nine agrammatic aphasic and nine unimpaired participants revealed no effects of morphological complexity, but a significant effect of frequency on production latency. The results indicate that morphological complexity plays little role, if any, in production difficulty, at least for this experimental task and this group of non-apraxic agrammatic aphasic individuals. A difficulty in usage of contextually appropriate verb inflections, rather than in morphophonological encoding, is suggested.

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Morphophonological structure and agrammatic regular/irregular past-tense production

Cited by 9 publications

References 7 publications

Production of Verb Tense in Agrammatic Aphasia: A Meta-Analysis and Further Data

Production of Verb Tense in Agrammatic Aphasia: A Meta-Analysis and Further Data

The impact of morphophonological patterns on verb production: evidence from acquired morphological impairment

Production latencies of morphologically simple and complex verbs in aphasia

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