Category-specific verb-semantic deficits in Alzheimer's disease: Evidence from static and dynamic action naming.

TitleCategory-specific verb-semantic deficits in Alzheimer's disease: Evidence from static and dynamic action naming.
Publication TypeJournal Article
Year of Publication2021
Authorsde Almeida RG, Mobayyen F, Antal C, Kehayia E, Schwartz G
JournalCogn Neuropsychol
Volume38
Issue1
Pagination1-26
Date Published2021 Feb
ISSN1464-0627
Abstract

We investigated the representation and breakdown of verb knowledge employing different syntactic and semantic classes of verbs in a group of individuals with probable Alzheimer's Disease (pAD). In an action naming task with coloured photographs (Fiez & Tranel, 1997. Standardized stimuli and procedures for investigating the retrieval of lexical and conceptual knowledge for action. , 25(4), 543-569. https://doi.org/10.3758/BF03201129), pAD individuals were impaired for naming actions compared to objects. Verb tense was also affected, with simple-past (e.g., ) being more difficult to name than the gerundial form (e.g., ). Employing action-naming with short movies depicting events and states, we contrasted three verb classes based on their hypothetical structural and semantic/conceptual properties: argument structure, thematic structure, and conceptual templates. The three classes were: causatives (), verbs of perception (), and verbs of motion () Overall, results suggest that individuals with pAD are selectively impaired for verb tense and thematic assignment, but not conceptual-template complexity. Methodologically, we also show that dynamic scenes are more ecologically valid than static scenes to probe verb knowledge in AD.

DOI10.1080/02643294.2020.1858772
Alternate JournalCogn Neuropsychol
PubMed ID33455543