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Wait time is defined in terms of the duration of pauses separating utterances during verbal interaction. The paper reviews studies involving wait time in a range of subject areas and grade levels. When average wait time was greater than a threshold value of 3 seconds, changes in teacher and student discourse were observed and higher cognitive level achievement was obtained in elementary, middle, and high school science. Achievement increases were also reported in middle school mathematics. Wait time appears to facilitate higher cognitive level learning by providing teachers and students with additional time to think.
Kenneth Tobin (Sun,) studied this question.