“…Moreover, other studies have investigated additional variables beyond simple curves and angles. Those included both properties of the stimuli—e.g., complexity [ 22 , 24 , 28 , 29 , 30 , 38 ], symmetry [ 24 , 36 ], balance [ 22 , 24 ], novelty/innovativeness [ 38 ], meaningfulness [ 26 , 29 ], typicality [ 38 , 39 ], familiarity [ 4 , 33 ], as well as individual differences of the perceivers—e.g., sex [ 3 , 27 , 30 ], expertise in art/design [ 3 , 4 , 24 , 33 , 38 ], academic degree [ 33 ], personality traits [ 3 , 22 , 33 ], cognitive styles [ 26 ], and neurological disorders such as autism [ 4 , 21 , 30 ], in an attempt to understand whether they affect or modulate contour perception. Different outcome measures have been used in previous studies, including forced-choice response [ 29 , 31 , 32 ], rating/visual analogue scales [ 4 , 16 , 19 , 20 , 21 , 22 , 24 , 29 , 30 , 33 , 37 , 39 ], and selection procedures [ 26 ], in addition to more implicit ...…”