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Table 6 Correlation matrix for KiTAP measures meeting the criteria of acceptable feasibility, reproducibility, range, distribution, and behavioral association.

From: Feasibility, reliability, and clinical validity of the Test of Attentional Performance for Children (KiTAP) in Fragile X syndrome (FXS)

Subtest Measure Alertness Distractibility Go-NoGo Flexibility Vigilance
   RT SD RT b Errors Errors Errors RT RT
Alertness RT 1 0.763 (28)*** 0.127 (24) 0.105 (27) 0.416 (26)* -0.062 (26) 0.479 (17)*
  SD RT - 1 -0.063 (24) 0.342 (27) 0.433 (26)* 0.094 (26) 0.228 (17)
Distractibility Errors - - 1 0.535 (28)** 0.095 (25) -0.195 (25) 0.263 (18)
Go-NoGo Errors - - - 1 0.151 (27) -0.458 (27)* -0.133 (18)
Flexibility Errors - - - - 1 -0.059 (27) 0.420 (18)
  RT - - - - - 1 0.231 (18)
Vigilance RT - - - - - - 1
  1. aAbbreviations: KiTAP, Test of Attentional Performance for Children; RT, reaction time; SD, standard deviation.
  2. bPearson correlations (r values) are shown with number of tests on which the correlation is based given in parentheses. *P < 0.05, **P < 0.005, ***P < 0.0001