School of Psychology, Social Work, and Social Policy, University of South Australia.
Department of Neurology, University Hospital Zürich.
J Exp Psychol Gen. 2017 Oct;146(10):1438-1447. doi: 10.1037/xge0000358. Epub 2017 Sep 4.
Healthy individuals usually display a bias toward the left side of space. This effect can be measured in a line bisection task or, alternatively, in a landmark task where prebisected lines are presented to participants. Several factors have been shown to influence pseudoneglect, that is, to vary the magnitude of the left side bias. We performed 2 landmark experiments: 1 online (n = 801) and a 2nd in the laboratory (n = 20). Our results demonstrate that pseudoneglect is strongly modulated by the sequence of trials in a landmark task. Of particular relevance is the fact that, for some histories of responses, pseudoneglect is inverted such that apparently there is a preference for the right side. In addition, we show that the way in which the point of subjective equality depends on the previous sequence of trials is well approximated by an exponential filter, well known from the literature of sequential effects to be related to motor control. In other words, the type of sequential effects we encountered in the landmark task is consistent with a purely motor contribution, further deepening our understanding of the way motor control influences pseudoneglect. (PsycINFO Database Record
健康个体通常表现出对空间左侧的偏向。这种效应可以通过线二分任务来测量，或者在地标任务中测量，在该任务中，向参与者呈现预先二分的线。已经有几个因素被证明会影响假性忽视，即改变左侧偏向的幅度。我们进行了 2 项地标实验：1 项在线（n=801）和 1 项在实验室进行（n=20）。我们的结果表明，地标任务中的试验序列强烈调节假性忽视。特别相关的是这样一个事实，即对于某些反应历史，假性忽视会被反转，因此似乎对右侧有偏好。此外，我们表明，主观等点随先前试验序列的变化方式很好地被指数滤波器所逼近，该滤波器在序列效应的文献中是众所周知的，与运动控制有关。换句话说，我们在地标任务中遇到的序列效应类型与纯粹的运动贡献一致，这进一步加深了我们对运动控制如何影响假性忽视的理解。
