Cross-Cultural Adaptation of the Big Five Inventory (Bfi) to Sinhala

Purpose: The present study aimed to adapt the Big Five Inventory (BFI) into Sinhala and evaluate its content validity and comprehension.
Methods: Following WHO guidelines, the scale was forward-translated, reviewed by an expert panel (n=3), back-translated, and tested for comprehension among 11 participants with varied educational backgrounds. Content Validity Index (CVI) scores were calculated. Results: Thirty-one items required minor linguistic modifications. Two items scored low (ICVI = 0.3–0.5) and were revised with linguistic consultation. Eight items scored moderate relevance (ICVI = 0.6) and were modified with expert input. The majority scored 1.0. The overall S-CVI was 0.88, indicating acceptable content validity. All items were rated “easy to understand” in the comprehension test.
Conclusion: The Sinhala BFI demonstrates acceptable content validity and comprehension. Further psychometric validation (e.g., reliability, factor structure) is required before clinical and occupational use.