• Time estimation;
  • Temporal reproduction;
  • Contingent negative variation;
  • Current-source density analysis;
  • Motor processing;
  • Supplementary motor area


Two event-related potential studies were conducted to investigate differential brain correlates of temporal processing of intervals below and above 3–4 s. In the first experiment, 24 participants were presented with auditorily marked target durations of 2, 4, and 6 s that had to be reproduced. Timing accuracy was similar for all three target durations. As revealed by current-source density analysis, slow-wave components during both presentation and reproduction were independent of target duration. Experiment 2 examined potential modulating effects of type of interval (filled and empty) and presentation mode (randomized and blocked presentation of target durations). Behavioral and slow-wave findings were consistent with those of Experiment 1. Thus, the present findings support the notion of a general timing mechanism irrespective of interval duration as proposed by scalar timing theory and pacemaker-counter models of time estimation.