I have some questions about frame rates for RSVP experiments. I don’t want to overwhelm you with a lot of questions, so if it would be better to talk verbally please let me know.
Do you know the shortest image duration we can display in a sequence of images? I don’t know how the lab’s displays are set up, but my guess is we have a 60 Hz refresh rate, giving us a lower bound of 1/60Hz ~= 17 ms images. I would also guess that image durations could be set to any multiple of the shortest duration (up to a few seconds).
Can image durations be set on a per-frame basis (i.e. variable image duration within a trial)?
I’m also interested in varying the fixation dot duration. Can this be varied in the same way as the image duration? I hope to use the standard 100 ms and decrease in increments down to 0 ms (i.e. a seamless movie-like playback).
How would the image and fixation durations be encoded in the experiment?
In addition to RSVP, I’m hoping to display movies. I suppose I could cut a movie into individual frames and present them just like RSVP. Alternately, is there a way to play back intact movies (i.e. not cut into frames) and have the same timing accuracy/precision as RSVP? I’m also interested in varying the frame rate/image duration in the same way as RSVP. My guess is the best option is to cut the movie into frames, but I wanted to get an idea of the options.
Thanks in advance.