Psychonomic Bulletin & Review

, Volume 8, Issue 2, pp 336–342

The dual-task SRT procedure: Fine-tuning the timing

Brief Reports

DOI: 10.3758/BF03196170

Cite this article as:
Hsiao, A.T. & Reber, A.S. Psychonomic Bulletin & Review (2001) 8: 336. doi:10.3758/BF03196170


In the standard sequential reaction time study, subjects are presented with a repeating sequence of targets to which they must respond as rapidly as possible. With practice reaction times decrease, suggesting a learned ability to exploit the repeating patterns in the display. In a common variation, a second task is interposed, typically a tone-counting task in which subjects must keep track of the frequency with which particular tones occur. In the canonical experiment, these tones appear at varying times in the interval between the subjects’ response to a target and the next target. Data are presented that show that this latter variable (the RSOA, response-secondary stimulus onset asynchrony) actually plays an important but previously hidden role in these experiments. A model based on an extension of the notion of the psychological refractory period is introduced to explain these findings.

Download to read the full article text

Copyright information

© Psychonomic Society, Inc. 2001

Authors and Affiliations

  1. 1.Department of PsychologyBrooklyn College of CUNYBrooklyn