Oades, Robert D.; Christiansen, Hanna:

Cognitive switching processes in young people with attention-deficit/hyperactivity disorder.

In: Archives of clinincal neuropsychology, Jg. 23 (2008), S. 31-32
Zeitschriftenaufsatz / Fach: Medizin
Medizinische Fakultät » Universitätsklinikum Essen » LVR-Klinikum Essen » Klinik für Psychiatrie und Psychotherapie des Kindes- und Jugendalters
Patients with attention-deficit/hyperactivity disorder (ADHD) can be slow at switching between
stimuli, or between sets of stimuli to control behaviour appropriate to changing situations. We
examined clinical and experimental parameters that may influence the speed of such processes
measured in the trail-making (TMT) and switch-tasks in cases with ADHD combined-type, their
non-affected siblings and unrelated healthy controls. The latency for completion of the trail-making
task controlling for psychomotor processing (TMT B–A) was longer for ADHD cases, and correlated
with Conners’ ratings of symptom-severity across all subjects. The effect decreased with age. Switchtask
responses to questions of “Which number?” and “How many?” between sets of 1/111 or 3/333
elicited differential increases in latency with condition that affected all groups. But there was
evidence for increased symptom-related intra-individual variability among the ADHD cases, and
across all subjects. Young siblings showed familiality for some measures of TMT and switch-task
performance but these were modest. The potential influence of moderator variables on the efficiency
of processing stimulus change rather than the speed of processing are discussed.