Verbal Efficiency in Parkinson’s Disease: Analysis Through Content Units and Time Measurement on a Picture Description Task
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2025-06-05
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en
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Verbal efficiency in PD has been compared with healthy controls (HC) by analysing the description duration, produced content units (CUs) and word count. 55 participants (27 PD & 28 HC) described line drawings varying in complexity. No group differences were found for most variables and most complexity categories. However, a significant decrease in CUs manifested in one complexity category: PD showed a greater decline compared to healthy controls. Describing a picture in which a single individual performs two distinct actions posed a particular challenge for both groups in terms of CU-production. However, the PD group performed significantly worse on CU-production. This difficulty may be related to the syntactical complexity of the image, subtlety of the depicted action verbs, or underlying visual processing deficits of the PD group. The findings of this study support the use of CU based measures as a valuable tool for further examining linguistic impairments in PD.
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