Table 2 Mean scores with standard errors for auditory processing, memory and attention tests. There was no significant difference between the 2 groups for any of the tests (p > 0.05). For the tests marked with an asterisk the individual scores for normal children were also within the previously published42,43 age based normative data
Tests | Normal Children | Children with Listening Difficulty |
|---|---|---|
Brief tone frequency discrimination (threshold in Hz) | 100 Hz: 6.15Hz (0.84) | 100 Hz: 6.54Hz (1.05) |
1000 Hz: 5.43Hz (1.04) | 1000 Hz:6.70Hz (1.37) | |
Gap detection in noise (threshold in ms) | 2.92ms (0.27) | 3ms (0.30) |
Pitch pattern* (Percentage correct score) | Right: 92.21% (2.14) | Right:91.93% (2.85) |
Left: 92.76% (1.91) | Left: 92.2% (1.85) | |
SAM detection (threshold in dB) | 4 Hz: −23.79 dB (0.55) | 4 Hz: −22.21 dB(0.78) |
128 Hz: −20.97 dB (0.71) | 128 Hz: −19.59 dB (1.34) | |
TFS-LF58 (Interaural phase difference threshold in degrees) | 44.05 deg (5.05) | 35.23 deg (3.04) |
TFS158 (score in Hz) | 24.5 Hz (4.43) | 28.39 Hz (3.41) |
Dichotic digits* (Percentage correct score) | Right: 98.49% (0.89) | Right:95.23% (1.31) |
Left: 94.81% (2.3) | Left: 93.24% (1.70) | |
Binaural masking level diffference* (difference in dB) | 12 dB (1.2) | 12.08 dB (0.80) |
Localization (Root mean square lateral and polar angle errors (LAE and PAE) in Azimuth) | LAE:11.5 Az (0.9) | PAE: 14.25 Az (0.72) |
LAE: 14.58 Az (1.43) | PAE: 13.08 Az (0.57) | |
Sequential stream segregation (temporal coherence boundary in Hz) | 60.92 Hz (9.90) | 80.90 Hz (9.69) |
Spatial stream segregation* (spatial advantage raw score) | 11.90 (0.70) | 11.44 (0.56) |
Speech Recognition in Noise* (Signal to masker ratio threshold in dB) | SRT: −15 dB (0.6) | SRT: −13.74 dB (0.78) |
Digit Span* (Forward and backward digit span raw score) | Forward: 9.33 (0.54) | Forward: 8.5 (0.59) |
Backward: 7.08 (0.49) | Backward: 5.57 (0.25) | |
Auditory Continous Performance* (raw scores) | Inattention: 2.25 (0.65) | Inattention: 4.08 (1.08) |
Impulsivity: 1.08 (0.66) | Impulsivity: 1.5 (0.59) | |
Vigilance: 0.66 (0.28) | Vigilance: 1 (0.30) |
