“…In contrast, Omoto et al, who used nonstereoscopic stimuli with concave and convex surfaces to induce the perception of depth, reported enhanced P1 and P2 amplitudes. 30 Our results also may be interpreted as showing HbO and THb: Significant main effects of stimulus -for HbO, F(2, 154) ¼ 7, P < 0.05 and for THb, F(2, 135) ¼ 6, P < 0.05; location -for HbO, F(1, 79) ¼ 7, P < 0.05 and for THb, F(2, 135) ¼ 10, P < 0.05; condition -for HbO, F(1, 79) ¼ 584, P < 0.05 and for THb, F(1,79) ¼ 408, P < 0.05; interactions between stimulus and location -for HbO, F(2, 150) ¼ 5, P < 0.05 and for THb, F(2, 155) ¼ 3, P < 0.05; location and condition -for HbO, F(1, 79) ¼ 11, P < 0.05 and for THb, F(1, 79) ¼ 5, P < 0.05; and stimulus location and condition -for HbO, F(2, 151) ¼ 7, P < 0.05, and for THb, F(2, 144) ¼ 5, P < 0.05.…”