EEG Biofeedback Training for Attention Deficit Disorder: A Review of Recent Controlled Studies and Clinical Findings Siegfried Othmer, Ph.D., David Kaiser, Ph.D., and Susan F. Othmer, B.A. June, 1995 Page 3 of 3 Back

Introduction and Summary   Recent Findings Experimental Results

EXPERIMENTAL RESULTS
Mean pre- and post-training TOVA scores are presented in Table 3 for the initial re-evaluation after 20 training sessions. A univariate Analysis of Variance (ANOVA) was used to evaluate the effect of EEG biofeedback training on four components of the T.O.V.A. The four test components were Inattention (Percent Omission), Impulsivity (Percent Commission), Response Time, and Response Variability. Because some clinicians truncated test scores at 40 points (i.e., four standard deviations below normal), all individuals who scored 40 points or below were assigned the score of 40 points. A total of 239 subjects were included in this analysis.

Figure 3.
Mean standard scores for T.O.V.A. subtests before and after 20 EEG biofeedback sessions for 239 children and adults.

A significant effect of EEG biofeedback training as well as an interaction with TOVA components were observed in this data set (p < .001). After 20 EEG biofeedback sessions, subjects improved significantly in inattention scores (p < .0001); in impulsivity scores, (p < .0001); and in variability of response time (p < .0001). The mean improvement in impulsivity score is nearly one standard deviation (15 points in standar