Researchers have shown that the 24-hour circadian clock also influences cognitive performance in a wide variety of paradigms, including serial search, verbal reasoning, working memory tasks, suppressing wrong answers, and manual dexterity.[1][13] Performance on these tasks varies over the course of a day, with each type of task having a unique daily rhythm. For example, the best time to perform a working memory task tends to be midday, while immediate memory is best in the morning, and simple processing is ideally performed in the evening.[13] In addition, individual differences among participants can have an effect on daily rhythms in performance. Studies have found that children perform mental math exercises most successfully in the morning,[14] but young adults' performance peaks in the evening.[15] This variation in the performance of various tasks is attributable to a number of factors, including relative working memory load, change in strategy, hemispheric dominance, ability to suppress wrong answers, age, level of practice, and morningness-eveningness, many of which fluctuate according to time of day.[13] Based on these findings, researchers conclude that factors that disturb circadian rhythms can also affect cognitive performance.