“…Experiment 2 used frames of different shapes (circular and rectangular), still 2-D, to explore the frame's role, either as emphasizing the unity of the object (circular and rectangular) or providing a reference frame for comparison (rectangular only). Different versions of the typical mental rotation paradigm use different shaped frames (Borst, Kievit, Thompson, & Kosslyn, 2011;Hoyek, Collet, Fargier, & Guillot, 2012;Kooshabeh & Hegarty, 2010;Miller & Halpern, 2014;Neuburger, Jansen, Heil, & Quasier-Pohl, 2012;Vandenberg & Kuse, 1978). In Experiment 2, we compared rotation performance of two frame types to un-framed figures in order to extensively test framing effects.…”