Description of the problem: Hello forum! We are running an online experiment and are running in an issue where many (but not all) participants record a very low frame rate, in the order of 3-10 fps. Given that the experiment aims at capturing the timing accuracy of a sequence of keyboard key presse…

Hi There, Thanks for your careful testing, this is not an issue that we were aware of (I myself have never encountered this in my experiments) this indeed reflects the many unknowns regarding timing “in the wild”. Please correct me if I misunderstood anything - I do have a few questions: Was the…

Thank you for your reply! To answer your questions: We initially were only using the automatically calculated frameRate. After observing our first few participants with low frame rates, we added our frame rate calculation to see if the low fps values were only at the beginning of the experiment or…

Just to follow up, I made a new repository with visibility set to “internal” - this should allow you to access the experiment. I shortened the experiment by removing some parts, but this version still calls most of our functions and loads all the same resources. The routines that immediately follow …

Hi! Did you find a solution to the frame rate issue? I have the same problem with some online participants. They even sent me screenshots of their display settings which were set to 60 Hz but the frame rate recorded in the task output file was 30 Hz. Hardware acceleration was enabled when this happe…

Have there been any updates on this issue? We recently ran a task online and nearly half of our participants have a framerate below 10.

Sorry for the long silence. We are actually in the process of writing up a short manuscript summarizing the various problems/lessons learned when running online experiments through MTurk. Part of that will focus on this frame rate issue. I will add a link when it gets published. In our case a big f…

Dear Christian and Becca, we are experiencing similar problems whilst using PsychoJS 2023.1.3: it is a bit of a lottery at which frame rate our stimuli are rendered. In the final post, a beta version of PsychoJS that tests for hardware acceleration is mentioned. Would it be possible to share this …

@JohanH The code to check this within the experiment was already added by 2023.1.0. For participants that didn’t have hardware acceleration supported or turned on you should be seeing a column in your data files labelled hardware_acceleration containing 'NOT SUPPORTED'. Maybe link your project if y…

Hello. I am currently collecting data for a study and started to notice that a couple of my participants have abnormally low frame rates (< 3). From what I am reading in this thread, it seems like the solution that people came to is to ask participants to not use chrome. Is this correct? Are there o…

@jon Might there have been a change in 2024 related to this? [image] Problems with credit card calibration Online experiments I have been using the brilliant credit card calibration for years and it’s been working fine. However, I made the (possibly ill-advised) decision …

Very low frame rate in online experiment for some users

Online experiments

wakecarter October 17, 2024, 6:47pm 12

@jon Might there have been a change in 2024 related to this?

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Very low frame rate in online experiment for some users

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