A psychophysical measure of attention deficit in children with attention-deficit/hyperactivity disorder.
The authors explored the temporal mechanism of attention deficit in children with attention-deficit/hyperactivity disorder (ADHD). In rapid serial visual presentation tasks in which two targets (T-sub-1 and T-sub-2) were presented in close temporal proximity among distractors, participants tried to identify T-sub-1 and detect T-sub-2 in one (dual-task) experiment and only to detect T-sub-2 in a second control (single-task) experiment. The sensitivity of T-sub-2 detection was analyzed using signal detection theory. The attentional blink--the impairment in T-sub-2 detection following the identification of T-sub-1--was increased in magnitude and protracted in the patients. Moreover, some ADHD children appeared to have a blink largely normal in magnitude but temporally displaced toward a later time. The authors hypothesize that a slower closing of the attention gate may mediate this specific attention impairment in ADHD children.
Li
Chiang-shan Ray
CS
Brain and Behavior Laboratory, Medical Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan. chiang-shan.li@yale.edu
Lin
Wei-hao
WH
Chang
Hsueh-ling
HL
Hung
Ya-wen
YW
D001289:Attention Deficit Disorder with Hyperactivity / Q000175:diagnosis* / Q000453:epidemiology / Q000523:psychology*; D001767:Blinking; D002648:Child; D015897:Comorbidity; D005260:Female; D006801:Humans; D007859:Learning Disabilities / Q000453:epidemiology; D008297:Male; D012680:Sensitivity and Specificity