Figure 1.
Face aftereffect in opposite directions: Move your eyes up and down on the three red points on the top row for one minute. Then look down and fixate on the red dot on the bottom row. Do the adjacent test faces look the same? Or does one briefly look more like Bush and the other like Clinton? Most observers report that the test faces look different. Existence of two different aftereffects challenges the concept of a translation invariant aftereffect.