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The Severity-Calibrated Aphasia Naming Test
CONCLUSION: We provide a linear model to convert SCANT scores to aphasia severity scores, and we identify a change score cutoff of four SCANT items to obtain a high degree of confidence based on test-retest SCANT data and the modeled relation between SCANT and aphasia severity scores.SUPPLEMENTAL MATERIAL: https://doi.org/10.23641/asha.21476871.PMID:36332139 | DOI:10.1044/2022_AJSLP-22-00071
Source: American Journal of Speech-Language Pathology - November 4, 2022 Category: Speech-Language Pathology Authors: Grant M Walker Julius Fridriksson Argye E Hillis Dirk B den Ouden Leonardo Bonilha Gregory Hickok Source Type: research

Beyond Percent Correct: Measuring Change in Individual Picture Naming Ability
CONCLUSIONS: Consideration of item difficulty and response types revealed additional effects of treatment on naming scores beyond those observed for the standard accuracy measure. The results support theories that assume naming ability is decomposable into subabilities rather than being monolithic, suggesting new opportunities for measuring treatment outcomes. Supplemental Material https://doi.org/10.23641/asha.17019515.PMID:34818508 | DOI:10.1044/2021_JSLHR-20-00205
Source: Journal of speech, language, and hearing research : JSLHR - November 24, 2021 Category: Speech-Language Pathology Authors: Grant M Walker Alexandra Basilakos Julius Fridriksson Gregory Hickok Source Type: research

Disentangling the Psycholinguistic Loci of Anomia with Cognitive Psychometric Models
This article reviews advanced statistical techniques for measuring impairments in object naming, particularly in the context of stroke-induced aphasia. Traditional testing strategies can be challenged by the multifaceted nature of impairments that arise due to the complex relationships between localized brain damage and disruption to the cognitive processes required for successful object naming. Cognitive psychometric models can combine response-type analysis with item-response theory to yield accurate estimates of multiple abilities using data collected from a single task. The models also provide insights about how the te...
Source: Seminars in Speech and Language - July 14, 2021 Category: Speech-Language Pathology Authors: Grant M Walker Source Type: research

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