The objectives of this research were: 1) to develop and find out the quality of computer-assisted instruction using DRO reinforcement on painting with the Paint Brush program for reduce attention deficit hyperactivity disorders of intelligent disabilities students; 2) to evaluate skills on painting with the Paint Brush program for reduce attention deficit hyperactivity disorders of intelligent disabilities students; 3) to compare the concentration of intelligent disabilities students before and after learning through computer-assisted instruction, and 4) to study teachers’ satisfaction toward computer-assisted instruction. The sample was 8 students drawn by using purposive sampling from Prathomsuksa 1 students with intellectual 50-70 and attention deficit hyperactivity disorders. The research tools 1) computer-assisted instruction using DRO reinforcement on painting with the Paint Brush program; 2) the quality evaluation form 3) the evaluation test skills; 4) the observation form, and 5) the teachers’ satisfaction questionnaire. Data were analyzed by mean and standard deviation (S.D). The research result revealed that 1) the quality of computer-assisted instruction on painting with the Paint Brush program was at good level (mean = 4.40); 2) the skills on painting with the Paint Brush program for intelligent disabilities students was at good level (mean = 1.23); 3) Intelligent disabilities students has more concentrate than before after learning through computer-assisted instruction, and 4) the teachers’ satisfaction toward computer-assisted instruction was at good level (mean = 4.31)
