Identifying an Appropriate Picture Stimulus for a Bangla Picture Description Task.

Area of Science:

• Communication Sciences and Disorders
• Neurolinguistics
• Psycholinguistics

Background:

• Aphasia assessment tools are lacking for the Bangla language, impacting ~41% of stroke survivors.
• Stroke incidence is increasing in low- and middle-income countries with large Bangla-speaking populations.
• Culturally relevant and visually appropriate stimuli are crucial for accurate aphasia testing.

Purpose of the Study:

• To identify optimal picture stimuli for a Bangla picture description task (PDT) for aphasia assessment.
• To evaluate the impact of cultural relevance and visuographic variables on language production.
• To lay the groundwork for a culturally specific Bangla aphasia assessment tool.

Main Methods:

• Ninety-six healthy native Bangla speakers across three age groups participated.
• Spontaneous language production was analyzed for four picture stimuli varying in cultural relevance and visuographic properties.
• Linguistic variables including type-token ratio, words per minute (WPM), and mean length of utterance (MLU) were measured.

Main Results:

• Picture type significantly affected type-token ratio, WPM, and MLU.
• Age group significantly impacted WPM, MLU, and complexity index.
• High-context, color photographs elicited more comprehensive language production.

Conclusions:

• Culturally relevant, high-context color photographs are recommended for the Bangla PDT.
• Older Bangla speakers (65+) demonstrated reduced fluency and linguistic complexity.
• This research is essential for developing culturally sensitive aphasia diagnostics in the Bangla language.