Fig. 7.

Test-retest reliability of the SP and SP/AP ratio. Amplitudes and ratios for the second test session (T2) are plotted against those for the first test session (T1). The data for the mastoid electrode and canal tiptrode are plotted in the left- and right-hand column respectively. Spearman correlation coefficients are reported as a summary statistic. Low-noise exposed listeners are shown in open green circles and high-noise exposed listeners in filled grey circles. The diagonal lines represent the ideal relation (perfect reproducibility) between test sessions. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)