Hi,
I wonder what is real difference between setting size or position of stimuli in pixel vs points in Inquisit.
First I claryfy my current understanding of thi issue.
According to Wikipedia
Pixel: "it is the smallest controllable element of a picture represented on the screen" [
Pixel]
"The number of pixels in an image is sometimes called the resolution". So number of pixels in one inch/cm/mm depends on screen resolution, the higer resolution the more pixels is placed in one inch/cm/mm.
Consequently stimuli of 100 pixels height might have different physical height (e.g. as measured in mm) depends on screen resolution - it might look different (in terms of height) on different computers.
According to Wikipedia
Point is "the smallest
unit of measure (...),
1⁄
72 of an
international inch (about 0.353 mm)" [
Point]
Consequently stimuli of 100 points height should have the same physical height measured in mm (e.g 100 points x 0.353 mm = 35.3 mm) regardless of screen resolution. Stimulus height defined in points will look exactly the same on all screens independently of screen resolution.
My questions are:
Is this pixels and points notation work in this way in Inquisit? ( I can't imagine how one points can be independent from screen resolution)
How Inquisit can figure out how to properly calibrate one points as always e.g 0.353 mm?
What in a hypothetical situation when a point height (assume 0.353 mm) is smaller than one pixel height under actual screen resolution?
Thank in advance for all comments.