Development and Validation of Quadri Condition Dichotic Double Word Test in Kannada (DDWT-K).

Dichotic Listening (DL) is a test where auditory stimuli are presented simultaneously to each ear. DL has clinical applications in assessing APD, schizophrenia, and brain injury. It is sensitive to hemisphere differences and has been used to study language lateralization. The study aims to develop, validate and establish norms for a quadri condition dichotic double word test (Free recall, Forced Right, Forced Left and switch attention) in the Kannada language Methods: This study was carried out in two phases. Phase 1 aimed at development and validation of Dichotic Double Word Test in Kannada language (DDWT-K) and phase two involved data collection. The developed novel dichotic test was administered on 100 normal hearing adults in four conditions - Free recall, Forced Right, Forced Left, & Switch Attention. Results showed significant ear differences in free recall condition indicating right ear advantage. Switch attention condition showed slightly poorer performance when compared to both the forced attention condition indicating greater task difficulty. The test retest reliability was above 0.7 for all the condition indicating good reliability. The findings demonstrated the best preservation of the original dichotic effects and hence ready for clinical use.

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The Author(s). Published by S. Karger AG, Basel.