Creative thinking is another function of daydreaming associated with increased creativity. When tackling unsolved problems, the most productive incubation periods in terms of creative solutions are those in undemanding conditions rather than attention-demanding conditions. Moreover, the frequency of daydreaming is the highest during undemanding and easy tasks. Thus, it is reasonable to hypothesize that daydreaming plays an important role in generating creative problem-solving processes. Studies have also found that intentional daydreaming is more effective when focused on creative thought processing, rather than spontaneous or disruptive daydreams.