In 2013, Liliana Sacarin found significant early effects, after only 30 hours of Tomatis sound stimulation, in children 7-13 of age diagnosed with AD/HD when using standardized measures of performance, observed behavior and brain electrophysiology. The results of her doctoral dissertation evidenced statistically significant improvements in cognitive, attentional and behavioral measures for the Tomatis group when compared to the controls (non-Tomatis group). The Sacarin study reported that the qEEG group analysis resulted in significant brain electrophysiology changes for the Tomatis group but not for the controls.