“…The open-object illusion is a unique phenomenon in its magnitude, robustness and extent. It can be distinguished from other size perception effects caused by symmetry, meaning, or pronounceability, which tend to be more limited (Jin, Lee, & Yuan, 2016;New, Doré-Mazars, Cavézian, Pallier, & Barra, 2016;Reber, et al, 2014;Reber, Wurtz, Knapstad, & Lervik, 2010). In contrast, the open-object illusion is consistent with Saarinen and Levi's (1999) study showing that shape perception is more accurate for closed contour stimuli than for open contour stimuli.…”