A cognitive psychometric model for assessment of picture naming abilities in aphasia.

ABSTRACT: Picture naming impairments are a typical feature of stroke-induced aphasia. Overall accuracy and rates of different error types are used to make inferences about the severity and nature of damage to the brain's language network. Currently available assessment tools for picture naming accuracy treat it as a unidimensional measure, while assessment tools for error types treat items homogenously, contrary to findings from psycholinguistic investigations of word production. We created and tested a new cognitive psychometric model for assessment of picture naming responses, using cognitive theory to specify latent processing decisions during the production of a naming attempt, and using item response theory to separate the effects of item difficulty and participant ability on these internal pro

SUBMITTER: Walker GM 

PROVIDER: S-EPMC5980659 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature