Effects of severe bothersome tinnitus on cognitive function measured with standardized tests.

Neurocognitive tests compared abilities in people with bothersome tinnitus against an age-, gender-, and education-matched normative population. Participants between 18 and 60 years had subjective, unilateral or bilateral, nonpulsatile tinnitus for >6 months and a Tinnitus Handicap Inventory score of ≥ 38. Results from a first testing session showed deficits in learning, learning rates, immediate recall of heard words, and use of a serial order encoding strategy. Initial reliance on serial order encoding and, later, increased intrusion of incorrect words towards normal levels might indicate a less demanding strategy to compensate for weakness in associative memory for semantic categories.