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. 2015 Dec 16;6:1894. doi: 10.3389/fpsyg.2015.01894

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