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An Introduction to the Objective Psychophysics Toolbox.

Thomas Hartmann1, Nathan Weisz1

  • 1Centre for Cognitive Neuroscience and Department of Psychology, Paris-Lodron Universität Salzburg, Salzburg, Austria.

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|November 23, 2020
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Summary
This summary is machine-generated.

The Objective Psychophysics Toolbox (oPTB) simplifies experimental programming by offering a unified interface over the Psychophysics Toolbox (PTB). This enhances code readability and maintainability across diverse experimental setups.

Keywords:
EEGMATLABMEGfMRIopen source softwarepsychophysicsreaction timestimulus presentation

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Area of Science:

  • Cognitive Science
  • Neuroscience
  • Psychology

Background:

  • The Psychophysics Toolbox (PTB) is widely used for experimental paradigm development, offering powerful low-level device access.
  • Direct PTB programming can result in complex, hard-to-maintain code, especially across varied experimental setups.
  • Ensuring cross-facility compatibility and hardware integration presents significant challenges for researchers.

Purpose of the Study:

  • To introduce the Objective Psychophysics Toolbox (oPTB) as an intuitive and unified interface for PTB.
  • To enable researchers to write more readable, maintainable, and reusable experimental code.
  • To validate the timing accuracy of the oPTB across different hardware configurations.

Main Methods:

  • Developed the Objective Psychophysics Toolbox (oPTB) as a high-level abstraction layer on top of the PTB.
  • Designed oPTB for intuitive use, promoting clean and concise code structure.
  • Conducted timing accuracy tests by running identical MATLAB code on two distinct systems, including one with VPixx hardware.

Main Results:

  • The oPTB architecture facilitates the creation of clear and maintainable experimental code.
  • Timing accuracy tests demonstrated sub-millisecond precision on both tested systems.
  • The oPTB ensures consistent performance regardless of the underlying hardware setup.

Conclusions:

  • The Objective Psychophysics Toolbox (oPTB) significantly improves the development process for psychophysical experiments.
  • oPTB offers a robust and accurate solution for researchers needing to run experiments across different facilities.
  • The toolbox enhances code quality and experimental reliability, supporting broader scientific collaboration.