16 February 2021 2 3K Report

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.

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