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Table 2 Means, standard deviations and group comparison for TAP (tonic and phasic alert, Go/Nogo) and Counting Stroop tests

From: Neuropsychological and neurophysiological benefits from white noise in children with and without ADHD

Measures Group t test
TDC N = 17 ADHD N = 13 t values p
Mean SD Mean SD
Alertness (tonic)a
 Median 305.35 71.12 421.00 203.96 2.18 .04*
 CV 0.22 0.08 0.32 0.14 2.42 .02*
 Hits 40.00 0.00 39.62 0.96 −1.66 .11
 Anticipations 0.00 0.00 0.00 0.00
Alertness (phasic)b
 Median 281.94 55.20 353.38 115.81 2.24 .03*
 CV 0.17 0.05 0.31 0.17 3.31 .00*
 Hits 39.29 1.82 35.08 5.59 −2.93 .01*
 Omissions 0.00 0.00 0.54 1.45 1.54 .13
 Anticipations 5.00 4.55 12.08 8.69 2.89 .01*
Go/Nogo
 Median 521.88 79.15 584.83 92.01 1.97 .06
 CV 0.24 0.06 0.29 0.05 2.21 .03*
 Errors 2.59 2.12 5.23 3.68 2.48 .02*
 Omission 0.71 1.21 3.15 5.16 1.90 .07
Stroopc
 Time interf. index 39.59 16.41 72.46 23.95 4.46 <.001*
 Errors interf. index 0.35 0.70 2.08 3.40 2.04 .05*
  1. a Scores of tonic alert in alertness task
  2. b Scores of phasic alert in alertness task
  3. c Scores representing the difference of performance between counting and interference conditions: Time interf. index. difference of total times; Errors interf. index difference of non-corrected errors
  4. * p value indicating significant difference between groups; overall α = .0