Results and Discussion

The data submitted to analyses were time intervals produced in trials with breaks, not including break duration. For example, if in a trial with a 3-sec break, the time between the first and the second key press was 7400 msec, the datum used in the analysis was 4400 msec. For each participant, means and standard deviations of produced intervals were computed and data more than 3 SDs from the means were discarded, which represented 70 of 8320 observations. In both low-frequency and high-frequency groups, the data were averaged over trials with breaks to obtain a

3700 3600 3500 3400 3300 3200 ยก^ 3100 S 3000 E 2900

700 1200 1700 2200 no-

break

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