Bimanual coordination deficits in attention deficit/hyperactivity disorder (ADHD).
Although motor difficulties have been implicated in ADHD, studies investigating bimanual coordination have been few and their results inconsistent. This study examined the performance of 12 boys with ADHD combined type and their matched controls on a simple in-phase bimanual movement task (requiring symmetrical hand movements) and a complex out-of-phase bimanual movement task (requiring asymmetrical hand movements), at different designated speeds (1 and 2 Hz). Compared to controls, ADHD children were significantly more variable in both velocity and coordination, and less accurate in coordination, with the in-phase movements. For out-of-phase movements, the ADHD children were significantly more variable in velocity and coordination. These findings suggest a problem of bimanual coordination in the syndrome.
Klimkeit
Ester I
EI
Department of Psychology, School of Psychology, Psychiatry, and Psychological Medicine, Monash University, Victoria, Clayton, Australia. Ester.Klimkeit@med.monash.edu.au
Sheppard
Dianne M
DM
Lee
Paul
P
Bradshaw
John L
JL
D000375:Aging / Q000523:psychology; D001289:Attention Deficit Disorder with Hyperactivity / Q000523:psychology*; D002648:Child; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D007361:Intelligence Tests; D008297:Male; D009048:Motor Skills / Q000502:physiology*; D011569:Psychiatric Status Rating Scales; D011597:Psychomotor Performance / Q000502:physiology