Semantic, lexical, and phonological influences on the production of verb inflections in agrammatic aphasia

Faroqi‐Shah, Yasmeen; Thompson, Cynthia K.

doi:10.1016/j.bandl.2003.12.006

Cited by 65 publications

(61 citation statements)

References 37 publications

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“…These findings replicate those reported by Faroqi-Shah and Thompson (2004), who used a picture description task to investigate the production of verb stems, V + ed, V + s and V + ing verbs in future tense, past tense, present singular and present progressive contexts, respectively. It was hypothesized that any deficit specific to verb affixation would spare the production of future tense.…”

Section: Discussionsupporting

confidence: 88%

“…A majority of the verb form errors in Experiments 2 and 3 as well as in a previous picture description study (Faroqi-Shah & Thompson, 2004) were substitutions that involved tense mismatches between the adverb and verb morphology, such as Yesterday Mary speaks to the President (Experiment 2), Tomorrow the maid wiped the table (Faroqi-Shah & Thompson, 2004), and Yesterday the man calls a woman (Lee & Thompson, 2005; see also Druks & Carroll, 2005). Such errors suggest that individuals with agrammatic aphasia are unable to select the appropriate verb form when given a temporal context.…”

Section: Morphological Affixationsupporting

confidence: 51%

“…Multiple variables influence lexical accessibility, including frequency of occurrence, preceding context, individual language experience, and semantic markedness. Some previous studies have found an influence of various frequency measures on morphological production in agrammatic aphasia (Faroqi-Shah & Thompson, 2004;Meth et al, 1995). Using a sentence priming paradigm with agrammatic aphasic participants, Marin and Schwartz (1998) found that the target verb tense (e.g., painted) was more likely to be accurate when preceded by a congruent prime (e.g., pushed) when compared to an incongruent prime (e.g., pushes).…”

Section: Morphological Affixationmentioning

confidence: 93%

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Verb inflections in agrammatic aphasia: Encoding of tense features☆

Faroqi‐Shah

Thompson

2007

Journal of Memory and Language

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Across most languages, verbs produced by agrammatic aphasic individuals are frequently marked by syntactically and semantically inappropriate inflectional affixes, such as Last night, I walking home. As per language production models, verb inflection errors in English agrammatism could arise from three potential sources: encoding the verbs' morphology based on temporal information at the conceptual level, accessing syntactic well-formedness constraints of verbal morphology, and encoding morphophonological form. We investigate these aspects of encoding verb inflections in agrammatic aphasia. Using three sentence completion experiments, it was demonstrated that production of verb inflections was impaired whenever temporal reference was involved; while morphological complexity and syntactic constraints were less likely to be the source of verb inflection errors in agrammatism. These findings are discussed in relation to current language production models. KeywordsMorphology; Broca's aphasia; Language; Verb; Inflection; Models of sentence production Aphasia is an impairment in producing and/or comprehending language resulting from acute brain injury such as a cerebrovascular accident. Agrammatic speech is commonly associated with the clinical syndrome of Broca's aphasia, and is frequently characterized by ill-formed sentences, reduced syntactic complexity, a paucity of verbs, and grammatical morpheme errors. Production of both free grammatical morphemes and inflectional morphemes can be impaired in agrammatic aphasia. Across most languages that have been studied, verbs produced by agrammatic aphasic individuals are frequently marked by syntactically and semantically inappropriate inflectional affixes in a variety of tasks including spontaneous speech,

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Section: Discussionsupporting

confidence: 88%

Section: Morphological Affixationsupporting

confidence: 51%

Section: Morphological Affixationmentioning

confidence: 93%

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Verb inflections in agrammatic aphasia: Encoding of tense features☆

Faroqi‐Shah

Thompson

2007

Journal of Memory and Language

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“…For instance, Bastiaanse, Hugen, Kos and van Zonneveld (2002) show that production of finite verbs is harder for Dutch-speaking agrammatic speakers than nonfinite forms. Furthermore, in English, the progressive form V+ing does not seem to be difficult for agrammatic speakers, even though it is considered to be an inflected lexical verb (Abuom & Bastiaanse, 2012;Faroqi-Shah & Thompson, 2004). Nevertheless, difficulties with finite verbs seem to vary among agrammatic speakers.…”

Section: Verb Inflection In Agrammatic Narrative Speechmentioning

confidence: 99%

A characterization of verb use in Turkish agrammatic narrative speech

Arslan

Bamyacı

Bastiaanse

2016

Clinical Linguistics & Phonetics

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This study investigates the characteristics of narrative-speech production and the use of verbs in Turkish agrammatic speakers (n = 10) compared to non-brain-damaged controls (n = 10). To elicit narrativespeech samples, personal interviews and storytelling tasks were conducted. Turkish has a large and regular verb inflection paradigm where verbs are inflected for evidentiality (i.e. direct versus indirect evidence available to the speaker). Particularly, we explored the general characteristics of the speech samples (e.g. utterance length) and the uses of lexical, finite and non-finite verbs and direct and indirect evidentials. The results show that speech rate is slow, verbs per utterance are lower than normal and the verb diversity is reduced in the agrammatic speakers. Verb inflection is relatively intact; however, a trade-off pattern between inflection for direct evidentials and verb diversity is found. The implications of the data are discussed in connection with narrative-speech production studies on other languages. ARTICLE HISTORY

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“…In particular, finite verb forms, inflected for tense (e.g., the pasttense form 'fixed'), are especially vulnerable to disruption in stroke-induced agrammatism, whereas nonfinite verb forms (e.g. the infinitive 'to fix') are generally spared [5,17,19,20]; also see Thompson et al [59] for review. However, to our knowledge no studies have systematically investigated grammatical morphology deficits related to tense in individuals with PPA.…”

Section: Experiments 2 Production Of Verb Inflectionsmentioning

confidence: 99%

Syntactic and Morphosyntactic Processing in Stroke-Induced and Primary Progressive Aphasia

Thompson

Meltzer‐Asscher

Cho

et al. 2013

Behavioural Neurology

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Abstract. The paper reports findings derived from three experiments examining syntactic and morphosyntactic processing in individuals with agrammatic and logopenic variants of primary progressive aphasia (PPA-G and PPA-L, respectively) and strokeinduced agrammatic and anomic aphasia (StrAg and StrAn, respectively). We examined comprehension and production of canonical and noncanonical sentence structures and production of tensed and nontensed verb forms using constrained tasks in experiments 1 and 2, using the Northwestern Assessment of Verbs and Sentences (NAVS [57]) and the Northwestern Assessment of Verb Inflection (NAVI, Thompson and Lee, experimental version) test batteries, respectively. Experiment 3 examined free narrative samples, focusing on syntactic and morphosyntactic measures, i.e. production of grammatical sentences, noun to verb ratio, open-class to closed-class word production ratio, and the production of correctly inflected verbs. Results indicate that the two agrammatic groups (i.e., PPA-G and StrAg) pattern alike on syntactic and morphosyntactic measures, showing more impaired noncanonical compared to canonical sentence comprehension and production and greater difficulties producing tensed compared to nontensed verb forms. Their spontaneous speech also contained significantly fewer grammatical sentences and correctly inflected verbs, and they produced a greater proportion of nouns compared to verbs, than healthy speakers. In contrast, PPA-L and StrAn individuals did not display these deficits, and performed significantly better than the agrammatic groups on these measures. The findings suggest that agrammatism, whether induced by degenerative disease or stroke, is associated with characteristic deficits in syntactic and morphosyntactic processing. We therefore recommend that linguistically sophisticated tests and narrative analysis procedures be used to systematically evaluate the linguistic ability of individuals with PPA, contributing to our understanding of the language impairments of different PPA variants.

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Semantic, lexical, and phonological influences on the production of verb inflections in agrammatic aphasia

Cited by 65 publications

References 37 publications

Verb inflections in agrammatic aphasia: Encoding of tense features☆

Verb inflections in agrammatic aphasia: Encoding of tense features☆

A characterization of verb use in Turkish agrammatic narrative speech

Syntactic and Morphosyntactic Processing in Stroke-Induced and Primary Progressive Aphasia

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