In a manner relating to dichotic presentation, where different stimuli are presented to each ear separately.
From dichotic + -ally (adverb suffix). This is the adverbial form used in scientific contexts to describe methodology in auditory research.
When researchers present stimuli dichotically in a lab, they're basically hacking into the competition between your two ears to understand how your brain decides what to listen to—it's a window into the constant negotiation happening in your auditory system.
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