“…Schultz, Imamizu, Kawato, & Frith, 2004). Notably, we did not use shapes that indicate affordances, such as rectangles or lines that represent houses or barriers (e.g., Baker, Saxe, & Tenenbaum, 2009;Castelli et al, 2000;Heider & Simmel, 1944;Tavares, Lawrence, & Barnard, 2008), or background contexts that were cartoon characterizations of real-world objects (Wheatley et al, 2007). By using circles, which do not have a line of symmetry, we could use a simpler model that did not have to determine or track the direction the shapes were facing, a cue that people use to detect intentions (e.g., Blythe et al, 1999;Gao, Newman, & Scholl, 2009).…”