线索呈现的时空特性对表征动量的影响

为揭示注意对表征动量的影响机制，我们结合线索提示和表征动量范式，通过两个实验比较高、低相关线索分别在诱导期间与保持间隔呈现对表征动量的影响，结果发现：(1)高相关线索的时间特性主效应不显著，最终位置均发生边缘性的向前偏移。(2)低相关线索呈现在诱导期间时，表征动量显著；呈现在保持间隔时，发生向后偏移。这些表明，随着注意增大，表征动量减小；高相关线索更有利于定位，而低相关线索易受时间特性的影响。研究结果验证表征动量的双加工理论。

The Effect of Spatial-temporal Cueing on Representation Momentum

Memory for the final location of a moving target is often displaced in the direction of anticipated target motion, and this has been called representational momentum. How the attention influence the representational momentum is a question of empirical and theoretical interest. Hayes and Freyd’s (2002) experiments the manipulation of attention occurred during presentation of the target and was relatively long in duration, in which forward displacement increased with decreases in attention. Whereas in Kerzel’s(2003) experiment, the manipulation of attention occurred after the target vanished and was relatively short in duration, in which forward displacement decreased with decreases in attention. In an attempt to consider whether methodological differences or effects of attention per se can account for the different results of Hayes and Freyd and of Kerzel, we considered the effects of a spatial cue in the experiments reported here. The cue presented at the same display coordinates of the final position of a horizontally moving target were considered the high-relevant cue; The cue presented at the same display coordinates of the first position of a horizontally moving target were considered the low-relevant cue, The research included two experiments. In experiment l, the high-relevant cue and the low-relevant cue was presented during of target motion. In experiment 2, the high-relevant cue and the low-relevant cue was presented the during the retention interval. Forty-eight undergraduates attended experiments. Each participant was assigned to either the experiment l group or experiment 2 group, who received 168 trials [3(Cue: the high-relevant cue, the low-relevant cue, cue absent) × 2(direction of motion: left, right) × 7(probes: -15,-10,-5, 0, +5, +10, +15) × 4 replications] in a different random order. These experiments resulted in three main findings: First, the high-relevant cue or the low-relevant cue was presented during of target motion or during the retention interval, forward displacement of target decreased, relative to when a cue was absent. Second, presentation of the high-relevant cue during of target motion or during the retention interval decreased forward displacement of the target. Representational momentum was marginally significant, but the high-relevant cue did not eliminate forward displacement of the target. Third, presentation of the low-relevant cue during of target motion interval decreased forward displacement of the target, representational momentum was significant; Presentation of the low-relevant cue during the retention interval, displacement of the target was opposite to the direction of motion. In conclusion, the results of this study indicated that cues provided information regarding the final location of the target, which suggested that representational momentum was a control process. The high-relevant cue played a critical part in localizing target motion, but it did not eliminate forward displacement of the target. This was consistent with hypotheses that representational momentum is at least partly automatic. However, the low-relevant cue presented at different timings or for different durations could have different effects upon the placement. To the further verified the two-process theory of representational momentum.