Assumpção Leonardo, Shi Zhuanghua, Zang Xuelian, Müller Hermann J, Geyer Thomas
General and Experimental Psychology, Ludwig Maximilian University.
J Exp Psychol Hum Percept Perform. 2018 Apr;44(4):566-577. doi: 10.1037/xhp0000478. Epub 2017 Oct 16.
This work investigates the reference frame(s) underlying tactile context memory, a form of statistical learning in a tactile (finger) search task. In this task, if a searched-for target object is repeatedly encountered within a stable spatial arrangement of task-irrelevant distractors, detecting the target becomes more efficient over time (relative to nonrepeated arrangements), as learned target-distractor spatial associations come to guide tactile search, thus cueing attention to the target location. Since tactile search displays can be represented in several reference frames, including multiple external and an anatomical frame, in Experiment 1 we asked whether repeated search displays are represented in tactile memory with reference to an environment-centered or anatomical reference frame. In Experiment 2, we went on examining a hand-centered versus anatomical reference frame of tactile context memory. Observers performed a tactile search task, divided into a learning and test session. At the transition between the two sessions, we introduced postural manipulations of the hands (crossed ↔ uncrossed in Expt. 1; palm-up ↔ palm-down in Expt. 2) to determine the reference frame of tactile contextual cueing. In both experiments, target-distractor associations acquired during learning transferred to the test session when the placement of the target and distractors was held constant in anatomical, but not external, coordinates. In the latter, RTs were even slower for repeated displays. We conclude that tactile contextual learning is coded in an anatomical reference frame. (PsycINFO Database Record
本研究探讨了触觉情境记忆背后的参照系，触觉情境记忆是触觉（手指）搜索任务中的一种统计学习形式。在该任务中，如果在与任务无关的干扰物的稳定空间排列中反复遇到搜索目标物体，随着时间的推移，检测目标会变得更加高效（相对于非重复排列），因为习得的目标-干扰物空间关联开始引导触觉搜索，从而将注意力引导至目标位置。由于触觉搜索显示可以用多种参照系来表示，包括多个外部参照系和一个解剖学参照系，在实验1中，我们询问重复的搜索显示在触觉记忆中是否以环境为中心或解剖学参照系来表示。在实验2中，我们继续研究触觉情境记忆的以手为中心与解剖学参照系。观察者执行一项触觉搜索任务，分为学习和测试阶段。在两个阶段之间的过渡时我们对手部进行姿势操作（实验1中交叉↔不交叉；实验2中掌心向上↔掌心向下），以确定触觉情境提示的参照系。在两个实验中，当目标和干扰物的位置在解剖学坐标而非外部坐标中保持恒定时，学习期间获得的目标-干扰物关联会转移到测试阶段。在后者中，重复显示的反应时甚至更慢。我们得出结论，触觉情境学习是以解剖学参照系编码的。（《心理学文摘数据库记录》 ）
