Test of two views of impulsivity in hyperactive and conduct-disordered children
Article first published online: 29 SEP 2008
Developmental Medicine & Child Neurology
Volume 39, Issue 9, pages 574–584, September 1997
How to Cite
Leung, P. W. L. and Connolly, K. J. (1997), Test of two views of impulsivity in hyperactive and conduct-disordered children. Developmental Medicine & Child Neurology, 39: 574–584. doi: 10.1111/j.1469-8749.1997.tb07492.x
- Issue published online: 29 SEP 2008
- Article first published online: 29 SEP 2008
- Accepted for publication 16th April 1997.
The nature of impulsivity in hyperactive and conduct-disordered children was examined in two experiments, one involving a priming task, the other a delayed reaction time task. Four groups of children, aged 7 to 8 years and with IQs in the normal range, were recruited for study: (1) a pure hyperactive group (HA), (2) a hyperactive/conduct-disordered group (HA+CD), (3) a pure conduct-disordered group (CD), and (4) a normal control group (N). When the stimulus configuration and presentation were simple and well organized, none of the three clinical groups displayed any sign of impulsivity at the input/perceptual stage; there was no tendency to rush responding before adequate consideration of the relevant stimuli, i.e. a trading of accuracy for speed. Instead, the HA children were found to be disinhibited at the output/motor stage, i.e. failing to temporarily withhold activated responses. This deficit was found to be specific to the HA children; it was not observed in the CD and HA+CD children.