Contribution of Verbal Learning & Memory and Spectro‐Temporal Discrimination to Speech Recognition in Cochlear Implant Users. (14th May 2022)

• Record Type: Journal Article
• Authors: Harris, Michael S.; Hamel, Benjamin L.; Wichert, Kristin; Kozlowski, Kristin; Mleziva, Sarah; Ray, Christin; Pisoni, David B.; Kronenberger, William G.; Moberly, Aaron C.
• Is Part Of: Laryngoscope. Volume 133:Number 3(2023)
• Page Start: 661
• Page End: 669
• Publication Date: 2022-05-14
• Subjects: cochlear implants -- verbal learning and memory -- California Verbal Learning Test (CVLT) -- spectro‐temporal processing -- speech recognition -- postlingually deaf adults; Otolaryngology -- Periodicals; 617.51005
• DOI: 10.1002/lary.30210
• Languages: English
• ISSNs: 0023-852X

Abstract

Abstract : Objectives: Existing cochlear implant (CI) outcomes research demonstrates a high degree of variability in device effectiveness among experienced CI users. Increasing evidence suggests that verbal learning and memory (VL&M) may have an influence on speech recognition with CIs. This study examined the relations in CI users between visual measures of VL&M and speech recognition in a series of models that also incorporated spectro‐temporal discrimination. Predictions were that (1) speech recognition would be associated with VL&M abilities and (2) VL&M would contribute to speech recognition outcomes above and beyond spectro‐temporal discrimination in multivariable models of speech recognition. Methods: This cross‐sectional study included 30 adult postlingually deaf experienced CI users who completed a nonauditory visual version of the California Verbal Learning Test‐Second Edition (v‐CVLT‐II) to assess VL&M, and the Spectral‐Temporally Modulated Ripple Test (SMRT), an auditory measure of spectro‐temporal processing. Participants also completed a battery of word and sentence recognition tasks. Results: CI users showed significant correlations between some v‐CVLT‐II measures (short‐delay free‐ and cued‐recall, retroactive interference, and "subjective" organizational recall strategies) and speech recognition measures. Performance on the SMRT was correlated with all speech recognition measures. Hierarchical multivariable linear regression analyses showed that SMRT performance accounted for a significant degree of speech recognition outcome variance. Moreover, for all speech recognition measures, VL&M scores contributed independently in addition to SMRT. Conclusion: Measures of spectro‐temporal discrimination and VL&M were associated with speech recognition in CI users. After accounting for spectro‐temporal discrimination, VL&M contributed independently to performance on measures of speech recognition for words and sentences produced by single and multiple talkers. Level of Evidence: 3 Laryngoscope, 133:661–669, 2023 Abstract : This study examined the relations in cochlear implant users between visual measures of verbal learning and memory and speech recognition in a series of models that also incorporated spectro‐temporal discrimination. Measures of spectro‐temporal discrimination and verbal learning and memory were associated with speech recognition in CI users. After accounting for spectro‐temporal discrimination, verbal learning and memory contributed independently to performance on measures of speech recognition for words and sentences produced by single and multiple talkers.