The subjects will be age 65 years and older, with no upper limit of age range with hearing loss that are candidates for standard-of-care cochlear implant. Cognitive tests will be administered preoperative, and postoperative at 6 and 12 month, and 5 year intervals.
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Mini-mental State Exam (MMSE)
Timeframe: Pre-operatively, at 6 months, 12 months, and five year post-operatively.
Digit Span test (verbal)
Timeframe: Pre-operatively, at 6 months, 12 months, and five year post-operatively.
Stroop Color-Word Test (Golden version)
Timeframe: Pre-operatively, at 6 months, 12 months, and five year post-operatively.
Hopkins Verbal Learning Test-Revised (HVLT-R)
Timeframe: Pre-operatively, at 6 months, 12 months, and five year post-operatively
Hayling Sentence Completion Test
Timeframe: Pre-operatively, at 6 months, 12 months, and five year post-operatively
Spatial Span Test (visuospatial)
Timeframe: Pre-operatively, at 6 months, 12 months, and five year post-operatively
d2 Test of Attention
Timeframe: Pre-operatively, at 6 months, 12 months, and five year post-operatively
Brief Visuospatial Memory Test-Revised (BVMT-R)
Timeframe: Pre-operatively, at 6 months, 12 months, and five year post-operatively.
Trail Making Test Part B
Timeframe: Pre-operatively, at 6 months, 12 months, and five year post-operatively.