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A simple and sensitive method to measure timing accuracy.

Armand De Clercq1, Geert Crombez, Ann Buysse

  • 1Department of Applied Mathematics and Computer Science, Ghent University, Ghent, Belgium. armand.declercq@rug.ac.be

Behavior Research Methods, Instruments, & Computers : a Journal of the Psychonomic Society, Inc
|May 2, 2003
PubMed
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This study presents a simple, cost-effective system for measuring the timing accuracy of experimental stimuli presentation and response. The developed system achieves high precision, ensuring reliable data collection in behavioral research.

Area of Science:

  • Cognitive Psychology
  • Experimental Psychology
  • Human-Computer Interaction

Background:

  • Precise timing is crucial for experimental paradigms involving visual stimuli and response measurement.
  • Existing systems for timing accuracy assessment can be complex and expensive.

Purpose of the Study:

  • To describe a simple, low-cost system for measuring the timing accuracy of visual stimulus presentation and user responses.
  • To validate the accuracy of the developed system.

Main Methods:

  • A system utilizing two PCs (SlavePC and MasterPC), a photocell, and an amplifier was developed.
  • The SlavePC monitors responses and detects visual stimuli via a photocell.
  • Communication between PCs was established via a serial line and controlled by an ActiveX control in a Visual Basic program.

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Main Results:

  • The system demonstrated a timing accuracy of 0.01 milliseconds when tested against a pulse generator card.
  • Reaction time accuracy of INQUISIT software was assessed, showing millisecond accuracy for keyboard responses.

Conclusions:

  • The developed system provides a highly accurate and accessible method for measuring timing precision in experimental setups.
  • This system can be valuable for researchers needing to validate the timing accuracy of their experimental software and hardware.