DIFFERENCES IN BASE-LINE EEG MEASURES FOR ADD AND NORMALLY ACHIEVING PREADOLESCENT MALES

This study was designed as a replication of previous studies describin g dynamic EEG differences between behaviorally dissimilar groups. This study is intended as a reference point from which other researchers c an continue to establish the EEG correlates of ''on-task'' behavior. E ight Attention Deficit Disordered (ADD) children and eight Normally Ac hieving Controls (NAC) were assessed using dynamic EEG measures. Resul ts are reported for the tasks of baseline (eyes open), reading, and dr awing as recorded from FZ, CZ, PZ, C3, and C4. Significant amplitude d ifferences between the groups were demonstrated in the theta band (4-8 hertz) during all tasks and for all sites. Amplitude differences in t he beta band (12-20 hertz) were negligible. Differences between groups expressed as a ratio of theta/beta revealed significant differences m ainly in the parietal region for on-task conditions. These results are discussed in relation to EEG neuro-feedback training paradigms and th e importance of establishing normative ''on-task'' EEG values.