Good Day / Evening Psychopy Community:
I am currently doing some research where I wish to vary the eccentricity of a stimulus, while at the same time (to what extent it is possible) keep that stimulus a constant size WRT the retina. I am aware that I can have the default units of my window screen set to degrees of visual angle. I am wondering about a very basic thing if I do this:
Let’s say I have a stimulus appear at center-screen, say a red square, and I set its size to 3 degrees of visual angle (in both x- and y-dimensions). Then I also have another red square appear 15cm to the right of center-screen, while also specifying its size to be 3 degrees of visual angle (in both x- and y-dimensions). Given the eccentricity of this second stimulus (red square), and change in distance from the retina, by specifying the size in degrees of visual angle, does Psychopy’s back-end, given what it knows about my monitor (yes, it is calibrated, and all the dimensions specified as needed) take this into account when displaying the stimulus? In other words, will the size be scaled to reflect this DIFFERENT distance – forget, for the time being, the cortical magnification factor.