Across operating systems, the pattern was that precision was generally very slightly better under Ubuntu than Windows, and that macOS was the worst, at least for visual stimuli, for all packages. OpenSesame had slightly less precision across the board, but most notably in audio stimuli and Expyriment had rather poor precision. Among the lab-based experiments, Psychtoolbox, PsychoPy, Presentation and E-Prime provided the best timing, all with mean precision under 1 millisecond across the visual, audio and response measures. Where possible, the packages were tested on Windows, macOS, and Ubuntu, and in a range of browsers for the online studies, to try to identify common patterns in performance.

We compared a range of popular packages: PsychoPy, E-Prime®, NBS Presentation®, Psychophysics Toolbox, OpenSesame, Expyriment, Gorilla, jsPsych, Lab.js and Testable. Here we report a wide-ranging study looking at the precision and accuracy of visual and auditory stimulus timing and response times, measured with a Black Box Toolkit. Very little information is available, however, on what timing performance they achieve in practice. There are a large number of software packages with which to conduct these behavioral experiments and measure response times and performance of participants. Consider the possibility it and similarly categorized nonessential software may contribute to premature hard disk drive failure.Īt the opposite extreme perhaps you need Adobe and Microsoft, so keep them.Įverything else in the broad category in between is questionable.Many researchers in the behavioral sciences depend on research software that presents stimuli, and records response times, with sub-millisecond precision. I can easily come up with a half dozen or more candidates for deletion but start with that one. If you don't know where to begin, get rid of 'Cocktail'. It's up to you to determine what you require for your work, and to bear in mind anything that modifies a Mac can become a problem at any time in the future. Toward that end I suggest ridding that Mac of everything you don't really need, and as that report indicated there are a great many system modifications running in the background that are likely to be needless burdens. System modifications - There are a large number of system modifications running in the background.

Perhaps Safari just happens to be the most obvious symptom. However, it would affect everything and not just Safari. The rotating hard disk portion of Fusion Drive may be a factor and suggests it may be operating in a state of failure. However, the total amount of time it took to run EtreCheck is unusual.

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