Table 1.
Description of two speech-perception training studies.
| Study characteristic | IU word-based training | SPATS |
|---|---|---|
| Study type | Cohort study with control, single site | Cohort study with control, multiple sites |
| Training subjects | 14 older adults (61–85 years) F/M = 6/8 | 24 older adults (54–86 yr) F/M = 4/20 |
| Control subjects (passive) | 15 older adults (60–88 years) F/M = 6/9, matched to training group |
12 older adults (59–82 yr) F/M = 4/8, matched to training group |
| Hearing loss | Mild-to-moderate sloping SNHL | Mild-to-severe sloping SNHL |
| Hearing-aid users | No | Yes |
| Intervention | Individual computer-based training | Individual computer-based training |
| Training stimuli | Frequent words, phrases (closed set) | Syllables, sentences (closed set) |
| Talkers | 4 | 8–12 |
| Background | Speech-shaped 2-talker ICRA noise | Quiet and multitalker babble |
| Listening condition | Monaural with headphone | Sound field using own hearing aid(s) |
| Training duration | ~33 hr | ~30 hr |
| Subject interface | Auditory/orthographic display and feedback | Auditory/orthographic display and feedback |
| Audibility control | Spectral shaping to replicate well-fit hearing aid | Amplification with own hearing aid(s) |
| Pre/posttesting | Trained words and phrases, untrained VAST and CID sentences |
Untrained words and sentences (WIN, QuickSin, CST-A, CST-AV) |
| Other training outcomes | Pupillometry, structural and functional neuroimaging | Pupillometry, self-assessed task load, hearing-aid satisfaction |
| Other measures | Cognitive function | Cognitive function, nonspeech temporal/spectral resolution |
Note. IU = Indiana University, SPATS = Speech Perception Assessment and Training System, SNHL = sensorineural hearing loss, ICRA = International Collegium for Rehabilitative Audiology, VAST = Veterans Affairs Sentence Test (Bell & Wilson, 2001), CID = Central Institute for the Deaf Everyday Sentence Test (Davis & Silverman, 1978), WIN = Words in Noise Test (Wilson, 2003), QuickSin = Quick Speech in Noise Test (Killion, Niquette, Gudmundsen, Revit, & Banerjee, 2004), CST-A = Connected Speech Test (audio; Cox, Alexander, & Gilmore, 1987), CST-AV = Connected Speech Test (audiovisual; Cox, Alexander, Gilmore, & Pusakulich, 1989).