Table 5.
Summary of Findings from Review of 18 Test Battery Studies (20 articles) Making Use of Speech-Based Measures of Central Auditory Processing
| Type of speech test | Test or measure | # studies using test |
Proportion of studies reporting significant age effects* |
Proportion of studies reporting significant effects of hearing loss* |
Proportion of studies reporting significant effects of cognition* |
Proportion of studies reporting significant age effects without hearing loss confound *** |
|---|---|---|---|---|---|---|
| Speech in competing speech | SSI-ICM (single-talker background) | 13 | 9/10 | 8/8 | 4/5 | 3/7 |
| SPIN and QuickSIN (multiple-talker background) | 8 | 6/7 | 5/7 | 0/4 | 3/6 | |
| Speech in steady-state noise | Various syllable, word, and sentence stimuli | 2 | 1/1 | 2/2 | 1/2 | 0/1 |
| Temporally distorted speech | Time-compressed speech | 8 | 4/7 | 7/7 | 4/4 | 3/7 |
| Dichotic speech | DSI | 8 | 1/4 | 3/4 | 5/5 | 0/1 |
| Dichotic Digits | 4 | 1/2 | 1/1 | 2/2 | 0/0 | |
| Dichotic Nonsense Syllables | 2 | 2/2 | 0/2 | 1/1 | 2/2 | |
| SSW | 4 | 2/4 | 3/3 | 0/0 | 0/3 | |
| Other | PI-PB/PI-SSI Rollover | 2 | 2/2 | 1/1 | 0/0 | 0/0 |
| PB-SSI difference | 4 | 3/3 | 1/2 | 1/2 | 0/0 | |
| Low-pass filtered speech | 5 | 3/5 | 5/5 | 0/1 | 0/4 |
Note: To be included in this summary table, a speech test or measure was required to be used in two or more of the 18 test battery studies. For definitions of abbreviations, see Table 4.
Numerator = # of studies in which author(s) reported significant effect of independent variable (age, hearing loss, or cognitive function); Denominator = # of studies examining this effect.
Numerator = # of studies unconfounded by inaudibility, according to the author(s), that found a significant effect of age; Denominator = # of such unconfounded studies examining this effect.
Numerator = # of studies unconfounded by inaudibility, according to the task force, that found a significant effect of age; Denominator = # of such unconfounded studies examining this effect.