| Abstract: | Three experiments explore effects of rotational axis and velocity on observers' predictions regarding an object's future position, and begin to explore connections between this extrapolation task and representational momentum (RM). In general, observers accept as "correct" positions that are behind the correct extrapolated location, as shown in previous work (Cooper & Munger, 1993; Finke & Shyi, 1998). These prediction distortions are in the opposite direction of typical RM memory distortions, suggesting that these tasks are unrelated. However, new effects of axis for the extrapolation task are reported which parallel axis effects previously observed for RM and mental rotation tasks. Specifically, participants make larger negative distortion errors for axes of rotation that are not coincident with the viewer's coordinate system, as if these paths of rotation are harder to extrapolate. Effects of velocity and axis are examined for RM and extrapolation tasks, and the overall pattern of distortions supports a link. In particular, participants who misremember the location of an object as further along the implied path of motion also accept as "correct" positions relatively further along the extrapolated path of motion, suggesting that these apparently opposite types of errors are indeed related. |
