ABSTRACT

Objective

This study adapted the Definition-based Naming Test (DDQ-30) into Turkish (DDQ-30 TR) and assessed its psychometric properties.

Method

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).

Results

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).

Conclusions

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.

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