How to present time-accurate visual stimuli with jsPsych

[kurokida]

Hi, all.

I am the developer of the psychophysics plugin. I have measured the accuracy of the plugin and would like to share it here.

Summary

• The plugin enables to specify the stimulus presentation time not only in milliseconds but also in frames. When specified in frames, the accuracy was quite good. For general experiments, specifing in milliseconds would also be sufficient accuracy.
• The plugin has a mode in which PixiJS can be used to present stimuli; there is no difference in accuracy with and without PixiJS. PixiJS allows for the presentation of complex stimuli.
• It has been reported that it is difficult to present the visual and audio stimuli at intended SOAs, and the issue remains at this time, too.
• There were no problems with sound duration time.

See this report for details.