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The cultural and linguistic adaptation of the Oxford Cognitive Screen to Tamil

Published online by Cambridge University Press:  22 November 2023

Porrselvi A. P. Open the ORCID record for Porrselvi A. P. [Opens in a new window] ,
Prathiksha Venkateswaran ,
Sahasra Vijayanand ,
Sam S. Webb ,
Shreya Ramkumar ,
Sneha C. R.  and
Nele Demeyere
Porrselvi A. P.*
Affiliation:
Unified Brain Health Care, Chennai, Tamil Nadu, India
Prathiksha Venkateswaran
Affiliation:
Unified Brain Health Care, Chennai, Tamil Nadu, India
Sahasra Vijayanand
Affiliation:
Unified Brain Health Care, Chennai, Tamil Nadu, India
Sam S. Webb
Affiliation:
University of Oxford, Oxford, UK
Shreya Ramkumar
Affiliation:
Unified Brain Health Care, Chennai, Tamil Nadu, India
Sneha C. R.
Affiliation:
Unified Brain Health Care, Chennai, Tamil Nadu, India
Nele Demeyere
Affiliation:
University of Oxford, Oxford, UK
*
Corresponding author: Porrselvi A. P.; Email: porrselvi@ubhcare.com
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Abstract

Objective:

The Oxford Cognitive Screen (OCS) is a screening tool to assess stroke patients for deficits in attention, executive functions, language, praxis, numeric cognition, and memory. In this study, the OCS was culturally and linguistically adapted to Tamil, for use in India (OCS TA), considering the differences between formal and spoken versions of Tamil and consideration of its phonetic complexity.

Method:

We adopted two-parallel form versions of the OCS and generated normative data for them. We recruited 181 healthy controls (Mean = 39.27 years, SD 16.52) (141 completed version A, 40 completed version B, 33 completed version A and B) and compared the data with the original UK normative sample. In addition, 28 native Tamil-speaking patients who had a stroke in the past three years (Mean = 62.76 years, SD 9.14) were assessed. Convergent validity was assessed with subtasks from Addenbrooke’s Cognitive Examination III (ACE-III).

Results:

We found significant differences between the UK normative group and the OCS TA normative group in age and education. Tamil-specific norms were used to adapt the cutoffs for the memory, gesture imitation, and executive function tasks. When domain-specific scores on the ACE-III were compared, OCS TA exhibited strong convergent validity.

Conclusions:

The OCS TA has shown the potential to be a useful screening tool for stroke survivors among Tamil speakers with the two-parallel forms demonstrating good equivalence. Further empirical evidence from larger studies is required to establish their psychometric performance and clinical validity.

Keywords

TamilTamil cognitive screeningOxford Cognitive Screencognitive test translationcognitive test adaptationstroke cognition
Type
Research Article
Information
Journal of the International Neuropsychological Society , Volume 29 , Special Issue 10: Cross-cultural neuropsychology , December 2023 , pp. 964 - 971
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Neuropsychological Society

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