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Table 2 Association between difference scores on the go/no-go task and parent and teacher ratings on the Conners' scales (T-scores): correlations (r) and partial correlations, controlling for age (partial r), with associated effect sizes (d)

From: Testing assumptions for endophenotype studies in ADHD: Reliability and validity of tasks in a general population sample

Difference score Teacher (n = 38–39): total ADHD symptom score Parent (n = 45–46): total ADHD symptom score
  r d partial r d r d partial r d
slow – fast condition
   mean RT .19 0.4 .24 0.5 -.11 -0.2 -.06 -0.1
   SD of RTs .44** 1.0 .44** 1.0 .08 0.2 .13 0.3
   commission errors .39* 0.8 .40* 0.9 .11 0.2 .12 0.2
slow – incentive condition
   mean RT .36* 0.8 .38* 0.8 .15 0.3 .19 0.4
   SD of RTs .44** 1.0 .46** 1.0 .13 0.3 .17 0.3
   commission errors .21 0.4 .20 0.4 -.03 -0.1 -.06 -.01
  1. * p < .05 (2-tailed); ** p < .01 (2-tailed)