Reaction time distribution analysis of neuropsychological performance in an ADHD sample.

Differences in reaction time (RT) variability have been documented between children with and without Attention Deficit Hyperactivity Disorder (ADHD). Most previous research has utilized estimates of normal distributions to examine variability. Using a nontraditional approach, the present study evaluated RT distributions on the Conners' Continuous Performance Test in children and adolescents from the Multimodal Treatment Study of ADHD sample compared to a matched sample of normal controls (n = 65 pairs). The ex-Gaussian curve was used to model RT and RT variability. Children with ADHD demonstrated faster RT associated with the normal portion of the curve and a greater proportion of abnormally slow responses associated with the exponential portion of the curve. These results contradict previous interpretation that children with ADHD have slower than normal responding and demonstrate why slower RT is found when estimates of variability assume normal Gaussian distributions. Further, results of this study suggest that the greater number of abnormally long RTs of children with ADHD reflect attentional lapses on some but not all trials.     

The Buck Stops here: Why Universities Must Reclaim Business Ethics Education

Given the groundswell of corporate misconduct, the need for better business ethics education seems obvious. Yet many business schools continue to sidestep this responsibility, a policy tacitly approved by their accrediting agency, the Association to Advance Collegiate Schools of Business (AACSB). Some schools have even gone so far as to cut ethics courses in the wake of corporate scandals. In this essay I discuss some reasons for this failure of business school responsibility and argue that top university officials must go beyond weak accrediting standards to insist that ethics courses be required in business school curriculum. Otherwise, students will continue to get the message that practicing managers have little or no legal and ethical responsibilities to society.