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Fenise Selin Karalı, Samet Tosun, Elif İkbal Eskioğlu, Miray Dicle, Derya Çavdar, Nilgün Çınar, Joel Macoir, Validation of the Turkish Version of the DDQ-30: Norms and Clinical Utility for Detecting Lexical-Semantic Impairments, Archives of Clinical Neuropsychology, Volume 41, Issue 1, February 2026, acaf093, https://doi.org/10.1093/arclin/acaf093
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ABSTRACT
This study adapted the Definition-based Naming Test (DDQ-30) into Turkish (DDQ-30 TR) and assessed its psychometric properties.
The adaptation process included translation, cultural and linguistic modifications, expert review, and pilot testing. Normative data were collected from 357 cognitively healthy Turkish adults aged 50–79. Known-group discriminant validity was examined in 150 participants, including healthy controls (n = 50), individuals with mild cognitive impairment (MCI; n = 60), and Alzheimer’s disease (ad; n = 40).
DDQ-30 TR performance declined with age and improved with education. Norms were stratified by age, education, and sex. The test showed strong group validity (HC > MCI > ad) and acceptable reliability (α = 0.758).
The DDQ-30 TR is a reliable, culturally adapted auditory naming tool that enables lexical-semantic assessment in Turkish-speaking older adults, particularly those with visual limitations. The DDQ-30 TR can be used as a supportive instrument within broader clinical screening protocols for neurocognitive disorders, especially among individuals with visual limitations.