Sustained attention in normal and in reading-disabled youngsters with and without ADDH

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Abstract
Three groups of children — one normal, one reading-disabled, and one reading-disabled with an additional diagnosis of attention deficit disorder with hyperactivity (ADDH)-were administered the Continuous Performance Test and compared on correct detections and three types of commission errors. All three groups showed a decline in sustained attention over the course of the task but not differentially according to diagnostic group. When younger and older subgroups were compared, the reading-disabled children were found to make significantly more correct detections with increased age, but not when the reading disability was accompanied by ADDH. The latter group of children also were differentiated by a type of commission error, previously associated with impulsive responding, that remained prominent in the older subgroup of dually diagnosed children. Reading-disabled children were differentiated by a second type of commission error which possibly was associated with inattention or short-term memory deficit and which diminished with age.