Figure 6
From: Improved speech intelligibility in the presence of congruent vibrotactile speech input
(a) Individual tactile benefit (defined by congruent audio-tactile–auditory only task performance in % words correct) for each participant. Bars in yellow represent normal-hearing participants, bars colored in blue represent cochlear implant users. The mean tactile benefit for each group (5.3% for cochlear implant users and 5.4% for normal-hearing participants) is indicated by the solid line, with the shaded area representing the standard deviation. (b) Interaction of auditory only performance and tactile benefit as defined by a Person’s correlation, not correcting for dependencies between the variables. (c) Bootstrapped correlation density plots. The density of Pearson correlation coefficients obtained from 10,000 bootstrap resamples is displayed, illustrating the likelihood of obtaining a certain correlation between the auditory only and tactile benefit by chance. 95% confidence intervals are indicated by the dotted green lines. Dashed lines mark the observed correlation coefficient shown in (b), demonstrating that for cochlear implant users, there was a significant positive correlation relative to the null distribution of correlations (left). For normal-hearing participants the observed coefficient is not significantly different than the random variation inherent in the data set (right).
