Category-specific verb-semantic deficits in Alzheimer's disease: Evidence from static and dynamic action naming.
|Title||Category-specific verb-semantic deficits in Alzheimer's disease: Evidence from static and dynamic action naming.|
|Publication Type||Journal Article|
|Year of Publication||2021|
|Authors||de Almeida RG, Mobayyen F, Antal C, Kehayia E, Nair VP, Schwartz G|
|Date Published||2021 02|
|Keywords||Aged, Aged, 80 and over, Alzheimer Disease, Cognition, Female, Humans, Male, Middle Aged, Movement, Semantics, Vocabulary|
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.
|Alternate Journal||Cogn Neuropsychol|