Miller Jeff
Department of Psychology, University of Otago, Dunedin, New Zealand.
Psychophysiology. 2016 Apr;53(4):493-506. doi: 10.1111/psyp.12574. Epub 2015 Nov 6.
Two four-choice reaction time (RT) experiments used the lateralized readiness potential (LRP) and the limb selection potential (LSP) to assess the effects of spatial S-R compatibility on motor processes. Individual stimuli were presented at one corner of a square centered at fixation, and each response was made with the left or right hand or foot. In Experiment 1, the correct response was determined by stimulus location, whereas in Experiment 2 it was determined by stimulus identity. Horizontal and vertical compatibility affected both RT and response accuracy, but the LRP and LSP results suggested that compatibility had little or no direct effect on the duration of motor processes. In addition, the results suggest that the relatively new LSP measure is a useful index of motor activation processes. Its insensitivity to horizontal stimulus artifacts makes it especially useful for studying the effects of horizontal spatial compatibility.
两项四选一反应时（RT）实验利用侧化准备电位（LRP）和肢体选择电位（LSP）来评估空间刺激-反应兼容性对运动过程的影响。单个刺激呈现在以注视点为中心的正方形的一个角上，每个反应由左手或右手或左脚做出。在实验1中，正确反应由刺激位置决定，而在实验2中，正确反应由刺激特征决定。水平和垂直兼容性影响反应时和反应准确性，但LRP和LSP结果表明兼容性对运动过程的持续时间几乎没有直接影响。此外，结果表明相对较新的LSP测量是运动激活过程的一个有用指标。它对水平刺激伪迹不敏感，这使得它在研究水平空间兼容性的影响时特别有用。
