I am right now trying to create an experiment that requires accurate visual stimulus duration. Specifically, I want a red box to appear for 2 frames or ~33ms. The original task uses frames for the duration since everything I read online says that is the way to go. I am now moving the task online and…

My current solution is to measure and calculate the frame data to suit the hz of the monitor. I have had good results using this method I found in an old post. But instead of the int function I decided to use the round function. I was able to flexibly adapt to the frame rate of a 60hz and 144 hz mon…

It may be the same thing, but I used win.getActualFrameRate() instead of expInfo[‘frames’] and it successfully picked up changes in the frame rate of two different computers.

If it registers different frame rates on different computers, then that sounds like it works. In older versions, the frame rate was set to a constant (60) because it wasn’t being detected.

Need help choosing frames or timed duration for my visual stimulus

Online experiments

wakecarter April 10, 2024, 7:57am 3

Have you checked that expInfo frame rate works online? I know there used to be a problem with it.

Inaccurate stimulus duration timing for online image components

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Need help choosing frames or timed duration for my visual stimulus

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