I’m implementing a backward masking experiment with psychopy to run online on pavlovia. I’m a little bit in confusion with frame indexing given that I want to use frame as time units.
I have to present a stimulus for 50ms (~3 frames at 60hz) than a mask for 200ms (~12frames). Between the stimulus and the mask, I have a 0 or 100 (~6 frames) SOA.
I’ve also noticed that there is no precise way to assess the stimulus timing and the actual monitor refresh rate (there is this method)
Given that I’m using the builder, it is correct the following approach?
I have within the xlsx file the number of frames for each duration. I use the
+1 because I have reasoned that if the target lasts for 3 frames, the next frame will be the first available for the mask.