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. 2011 Jan;129(1):245–261. doi: 10.1121/1.3514527

Table 1.

Summary statistics for behavioral threshold measurements of test duration and threshold variability using maximum-likelihood yes–no task for normal and SNHL groups of subjects (1 ear per subject).

    Duration (s) SD of threshold (dB)
Frequency (kHz) N Block 1 mean Block 1 SD Total (Average across ears)
Normal subjects (group mean PTA = 5 dB HL, SD = 3 dB)
0.5 20 112 15 129 2.60
1 20 117 17 117 1.62
2 20 114 12 125 1.25
4 20 113 13 138 1.38
5 20 116 18 116 1.52
6 20 119 35 127 1.73
8 20 117 25 123 1.33
10.1 20 121 39 141 1.06
12.7 20 118 14 137 1.47
16 18 121 34 150 1.66
Median (0.5–12.7)   117 17 127 1.47
IQR (0.5–12.7)   4.3 11.3 14.2 0.29
SNHL subjects (group mean PTA = 72 dB HL, SD = 9 dB)
0.5 19 122 15 154 1.15
1 20 172 98 177 1.67
2 14 123 15 141 0.92
4 13 118 15 127 0.80
5 12 118 12 146 1.12
6 12 118 38 118 1.55
8 11 120 13 174 1.57
10.1 8 120 14 120 1.11
12.7 2 133 4 133 1.45
16 0 NR NR NR NR
Median (0.5–12.7)   120 15 141 1.15
IQR (0.5–12.7)   4.4 1.9 26.7 0.44
  111        
a

N = Number of subjects out of 20 with threshold in measurement range.

b

Block 1 mean = Mean duration in first block of three trials.

c

Block 1 SD = SD of duration in first block of three trials.

d

Total = Mean total duration across all blocks of trials needed for each subject.

e

SD of threshold = SD of threshold (dB HL) averaged over N subjects.

f

Median = Median of each column variable across frequencies 0.5–12.7 kHz.

g

IQR = Inter-quartile range of each column variable across 0.5–12.7 kHz.

h

Notes: Medians and IQRs were calculated from 0.5 to 12.7 kHz because the SNHL group had no subjects with data at 16 kHz. Except for the Block 1 SD, the normal group responses at 16 kHz were within the IQR of the medians between 0.5 and 12.7 kHz.