Abstract
The ability to benefit from the spatial separation of talkers in a multi-talker environment is critical to speech communication. A headphone-based test of spatial release from masking for speech (SR2) has been shown to be sensitive to differences between young, healthy listeners and listeners with various auditory deficits. Existing studies relied on a simplistic method to score SR2, comparing the number of correct responses in conditions of collocated and spatially-separated background talkers. Psychometric functions were fit to trial data compiled across multiple studies in order to evaluate if an alternative scoring method could improve diagnostic power. We hypothesized that differences in informational masking between collocated and spatially separated conditions would result in a difference in condition-specific slope estimates, thus leading to a relationship between scoring method and diagnostic power. Results showed a small but significant difference in slope between conditions, consistent with expectations, but the difference between scoring methods was not clinically significant. This information will be used to guide the development of a portable, rapid implementation of SR2 for clinical and research applications. [Funding provided by NIH R01 DC015051.]
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