The purpose of this study was to examine the effects of the individualized positive behavior support on
problem behaviors of two special school students with intellectual disabilities. The participants were
students with intellectual disabilities who received education in grade 3 in a special school. The study
utilized multiple baseline design across subjects, and measured behaviors using partial interval recording.
Functional behavior assessment was also conducted using direct observation, interviews with the teacher,
and with motivational checklist (MAS). Student’s personal profiles were analyzed to identify the function
of the behavior. The dependent variables were the classroom disruptive behaviors demonstrated by students
during class: out of seat behavior, making noise verbally, banging the desk, chatting with peers during
the instruction, and lying down on the floor. The findings from the study indicated that the
individualized positive behavior supports (i.e., antecedent strategies, alternative behavioral strategies, and
consequent strategies) were helpful reducing disruptive behaviors of the two students during both
intervention and maintenance phase. The implication included the guidelines for future research and
limitation.