St Clair Rebecca, Huff Markus, Seiffert Adriane E
Department of Psychology, Vanderbilt University, 111 21st Avenue South, Nashville, TN 37240, USA.
J Vis. 2010 Apr 28;10(4):18.1-13. doi: 10.1167/10.4.18.
People can keep track of target objects as they move among identical distractors using only spatiotemporal information. We investigated whether or not participants use motion information during the moment-to-moment tracking of objects by adding motion to the texture of moving objects. The texture either remained static or moved relative to the object's direction of motion, either in the same direction, the opposite direction, or orthogonal to each object's trajectory. Results showed that, compared to the static texture condition, tracking performance was worse when the texture moved in the opposite direction of the object and better when the texture moved in the same direction as the object. Our results support the conclusion that motion information is used during the moment-to-moment tracking of objects. Motion information may either affect a representation of position or be used to periodically predict the future location of targets.
当目标物体在相同的干扰物中移动时，人们仅使用时空信息就能跟踪它们。我们通过给移动物体的纹理添加运动，来研究参与者在物体的瞬间跟踪过程中是否使用运动信息。纹理要么保持静止，要么相对于物体的运动方向移动，移动方向与每个物体的轨迹相同、相反或正交。结果表明，与静态纹理条件相比，当纹理与物体向相反方向移动时，跟踪性能较差；当纹理与物体向相同方向移动时，跟踪性能较好。我们的结果支持这样的结论：在物体的瞬间跟踪过程中会使用运动信息。运动信息可能会影响位置表征，或者被用于定期预测目标的未来位置。
