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, Nair VP, Schwartz G
JournalCogn Neuropsychol
Volume38
Issue1
Pagination1-26
Date Published2021 02
ISSN1464-0627
KeywordsAged, Aged, 80 and over, Alzheimer Disease, Cognition, Female, Humans, Male, Middle Aged, Movement, Semantics, Vocabulary
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