Differentiating Type A behaviour and hyperactivity using observed motivation during a reaction time task
2003 (English)In: Infant and Child Development, ISSN 1522-7227, E-ISSN 1522-7219, Vol. 12, no 2, 145-158 p.Article in journal (Refereed) Published
In light of the previously found overlap between Type A behaviour as measured by the Matthews Youth Test for Health (MYTH) and hyperactivity scales, the overall aim of this study was to clarify the standing of MYTH‐defined Type A behaviour relative to hyperactivity and Attention‐Deficit/Hyperactivity Disorder (ADHD), using observed task motivation and performance on a choice reaction‐time task, the Complex Reaction Time (CRT) measure. This study included 21 boys exhibiting Type A behaviour, 22 ADHD boys, 20 non‐clinically hyperactive boys, and 20 non‐hyperactive boys, between the ages of 6 and 13 years. It was proposed that a differentiation of constructs would be possible using observed task motivation if the MYTH were a discriminantly valid measure of Type A behaviour. Results showed that the MYTH‐defined Type A group differed from the clinically diagnosed ADHD group, although it was markedly similar to the non‐clinical hyperactive group, displaying comparable CRT performance and low level of task motivation. Type A behaviour correlated to CRT performance and task motivation in a way which was conceptually more indicative of hyperactivity than of Type A behaviour, which questions the validity of the MYTH as a measure of the Type A construct. The MYTH Impatience subscale was found to be particularly impure with regard to hyperactivity.
Place, publisher, year, edition, pages
2003. Vol. 12, no 2, 145-158 p.
Type A behaviour, hyperactivity, ADHD, motivation, reaction time task
IdentifiersURN: urn:nbn:se:uu:diva-89618DOI: 10.1002/icd.270OAI: oai:DiVA.org:uu-89618DiVA: diva2:161261