I am currently trying to figure out how to calculate the visual angle of some visual stimuli I used in an experiment. I think I have all of the information I need to calculate this.
One is a square (54 millimetres each side) and the other is a circle (54 millimetres in diameter).
The viewing distance is 500 millimetres.
How would I calculate this? I used some guides about visual angle but I didn't find these helpful.
Hello, Sam Cowling
This is a wonderful online tool:
https://elvers.us/perception/visualAngle/
You simply add whichever two measures you have to get the third.
Hope that helps.
Brooke Hallowell
Sam, you might want to know the math behind the online tool.
I had written it down to answer a similar question here:
https://www.researchgate.net/post/Saccades-amplitude-or-saccade-length-calculation-for-each-saccade-in-degree
You just need to replace saccade lenght with the dimensions of your stimulus.
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