November 2019, Vol. 50, Issue 5
An A Priori Measure of Visual Difficulty of 2-D Sketches Depicting 3-D Objects
Mirela Widder, Avi Berman, and Boris Koichu
Aiming to enhance understanding of visual obstacles inherent in two-dimensional (2-D) sketches used in high school spatial geometry instruction, we propose a measure of visual difficulty based on the ratio between 2 attributes of the sketches: potentially misleading geometrical information (PMI) and potentially helpful geometrical information (PHI). Practical, theoretical, and methodological implications are inspected and discussed.
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