Mattson Paul S, Fournier Lisa R, Behmer Lawrence P
Psychology Department, Washington State University, Pullman, WA 99164-4820, USA.
Atten Percept Psychophys. 2012 Oct;74(7):1446-60. doi: 10.3758/s13414-012-0335-7.
We investigated whether binding among perception and action feature codes is a preliminary step toward creating a more durable memory trace of an action event. If so, increasing the frequency of a particular event (e.g., a stimulus requiring a movement with the left or right hand in an up or down direction) should increase the strength and speed of feature binding for this event. The results from two experiments, using a partial-repetition paradigm, confirmed that feature binding increased in strength and/or occurred earlier for a high-frequency (e.g., left hand moving up) than for a low-frequency (e.g., right hand moving down) event. Moreover, increasing the frequency of the first-specified feature in the action sequence alone (e.g., "left" hand) increased the strength and/or speed of action feature binding (e.g., between the "left" hand and movement in an "up" or "down" direction). The latter finding suggests an update to the theory of event coding, as not all features in the action sequence equally determine binding strength. We conclude that action planning involves serial binding of features in the order of action feature execution (i.e., associations among features are not bidirectional but are directional), which can lead to a more durable memory trace. This is consistent with physiological evidence suggesting that serial order is preserved in an action plan executed from memory and that the first feature in the action sequence may be critical in preserving this serial order.
我们研究了感知与动作特征代码之间的绑定是否是创建动作事件更持久记忆痕迹的初步步骤。如果是这样,增加特定事件的频率(例如,一个要求左手或右手向上或向下移动的刺激)应该会增加该事件特征绑定的强度和速度。使用部分重复范式的两个实验结果证实,高频事件(例如,左手向上移动)的特征绑定强度增加和/或比低频事件(例如,右手向下移动)发生得更早。此外,仅增加动作序列中首次指定特征的频率(例如,“左”手)就会增加动作特征绑定的强度和/或速度(例如,“左”手与向上或向下方向的移动之间)。后一个发现表明对事件编码理论的更新,因为动作序列中的并非所有特征都同样决定绑定强度。我们得出结论,动作规划涉及按照动作特征执行顺序对特征进行串行绑定(即,特征之间的关联不是双向的而是单向的),这可以导致更持久的记忆痕迹。这与生理学证据一致,该证据表明在从记忆中执行的动作计划中保留了串行顺序,并且动作序列中的第一个特征可能对保留此串行顺序至关重要。