Objective: The purpose of this research was to compare the efficacy of Neurofeedback, Ritalin and Combined therapy in reducing ADHD symptoms. The efficacy of such methods measured by testing increasing intelligent scores of the participants.

Materials & Methods: In this quase-experimental research, as case series, 16 participating children with mixed ADHD, that were selected as a purposeful manner, were treated into above approaches within four groups for ten weeks. The fourth group was not treated.

Results: The findings shown that the increasing of Intelligence Quotient (IQ) was caused by the combined treatment of Neurofeedback and Ritalin in every four group participants. Treatment by Ritalin alone caused increasing the intelligent scores, but it in some cases it was not considerable. Treatment method of Neurofeedback also caused increasing the score of IQ in three group participants. There was no change in the fourth group.

Conclusion: Efficacy of mixed therapy of Neurofeedback and Ritalin had increased the scores of children with ADHD in the intelligent as revised test of WISC-R shown in compare to the two other methods.