Applied Neuropsychology: Adult, 2026 (SCI-Expanded, Scopus)
Objective: This study aimed to assess the validity and reliability of the Turkish version of the Brief Cognitive Assessment Tool (BCAT) in differentiating between older adults with major Neurocognitive Disorder (MNCD) and mild neurocognitive disorder (MiNCD), and cognitively normal (CN) individuals. Method: Participants were categorized into MNCD (n = 152), MiNCD (n = 73), and CN (n = 53) groups by Diagnostic and Statistical Manual of Mental Disorders-5 criteria. The BCAT was translated and culturally adapted into Turkish. All participants completed the BCAT, Mini Mental State Examination, Montreal Cognitive Assessment (MoCA), Clock Drawing Test, and Öktem’s Auditory Verbal Learning Test. Internal consistency, test–retest reliability, and concurrent validity with MoCA were assessed. Receiver operating characteristic analysis was employed to determine a cutoff point for BCAT. Results: BCAT scores showed high internal consistency and test–retest reliability. BCAT and MoCA scores correlated strongly, confirming convergent validity. MNCD group had lower BCAT scores than MiNCD and CN across multiple cognitive domains. At a cutoff score of 33, BCAT distinguished MNCD from MiNCD and CN. Conclusions: Our findings suggest that the Turkish version of the BCAT is a valid and reliable screening tool for cognitive impairment in older adults. It effectively differentiates between MNCD, MiNCD, and CN individuals, supporting its clinical utility for early detection of neurocognitive disorders.