Accuracy and precision of visual stimulus timing in psychopy: no timing errors in standard usage

Garaizar, PabloVadillo, Miguel A2026-08-312026-08-312014-11-03Garaizar, P., & Vadillo, M. A. (2014). Accuracy and precision of visual stimulus timing in psychopy: no timing errors in standard usage. PLoS ONE, 9(11). https://doi.org/10.1371/JOURNAL.PONE.011203310.1371/JOURNAL.PONE.0112033https://hdl.handle.net/20.500.14454/6528In a recent report published in PLoS ONE, we found that the performance of PsychoPy degraded with very short timing intervals, suggesting that it might not be perfectly suitable for experiments requiring the presentation of very brief stimuli. The present study aims to provide an updated performance assessment for the most recent version of PsychoPy (v1.80) under different hardware/software conditions. Overall, the results show that PsychoPy can achieve high levels of precision and accuracy in the presentation of brief visual stimuli. Although occasional timing errors were found in very demanding benchmarking tests, there is no reason to think that they can pose any problem for standard experiments developed by researchers.eng© 2014 Garaizar, VadilloAccuracy and precision of visual stimulus timing in psychopy: no timing errors in standard usagejournal article2026-08-311932-6203