according to schmidt and lee 31 the term dual-task interference refers to the decrement in performance of one or both tasks when two activities are carried out concurrently. two schools of thoughts exist from which distinctive training methodologies originate. one theory explains that the cns overcomes dual task interference by mastering single-component tasks 34 . with practice,a skill may become more automatic. with greater automaticity, the attentional demand of the same task is reduced.
as a result, there are more cns resources attentional demand of the same task is reduced. as a result, there are more cns resources available for a secondary task.therefore, this theory emphasizes separate practice of component tasks.