ON DATA LIMITATIONS IN HYPERACTIVITY

Abstract
Three groups of children rated 1st as overactive and distractible, 2nd as distractible and 3rd as low on both activity and distractibility were examined in a visual search task with 3 levels of display load: 2, 3 and 4 items. The children were tested twice in 2 conditions of stimulus visibility to examine the encoding stage of the model used here. The hypothesis that an encoding deficit or data limitation may explain the attentional performance of either hyperactive or somewhat hyperactive subjects is rejected. A trade-off in speed and accuracy may be evident in (the) hyperactives.