This set of images includes 26 curved and angular abstract shapes, drawn without frame, enclosed in a square frame, and enclosed in a round frame. That is, each shape is drawn in 6 versions (unframed curved, square-framed curved, round-framed curved, unframed angular, square-framed angular, round-framed angular). The curved and angular versions of the same shape were drawn to maximally resemble each other, except for being angular or curved. These stimuli were drawn by Petr Grigorash.