Table 3.
Summary of studies which related working memory capacity (via reading span) to frequency compression.
| Authors (year) | Number of participants | Participant mean age in years (SD or age range) | Hearing aid processing | Reading span mean score in percent correct (SD or score range) | Recall | Significant hearing aid processing – working memory relationship? |
|---|---|---|---|---|---|---|
| Ellis and Munro, 2015 | 12 | 76 (range 65–84) | Frequency compression | 29% (SD = 11%) | Free | No |
| Arehart et al., 2013 | 26 | 72 (range 62–92) | Frequency compression | 40% (SD = 12%) | Free | Yes |
| Souza et al., 2015 | 29 | 74 (range 49–89) | Frequency compression and fast-acting WDRC | 38% (range 15–54) | Free | Yes |