ABSTRACT

This study assessed pseudoneglect using line bisection and perceptual landmark tasks in two matched online sessions. Line bisection bias was characterized by the traditional measure of Directional Bisection Error (DBE), and by Endpoint Weightings Bias (EWB), derived from an “endpoint weightings” analysis, made possible by the independent manipulation of left and right endpoints. EWB is proposed to index the relative attentional allocation to the two ends of the line. The expected leftward bias (pseudoneglect) was found, with larger effect sizes for EWB (d = −0.34 in both sessions) than for DBE (−0.22 in Session 1 and −0.14 in Session 2). Although EWB was slightly less reliable than DBE, it was more sensitive to pseudoneglect, and the endpoint weightings method has further advantages, including the option of an additional measure of non-lateralized attention. A substantial proportion of participants had difficulty following the instructions for the landmark task, which highlights the need for clear instructions and performance checks for this task. This study shows that line bisection can be used to measure pseudoneglect online, and provides grounds to suggest that the task should routinely include the independent manipulation of left and right endpoints, so that an endpoint weightings analysis can be performed.

摘要

这项研究在两个匹配的在线会话中使用线平分和感知地标任务评估了假性忽视。线平分偏差的特征在于方向二分误差 (DBE) 的传统度量，以及源自“端点权重”分析的端点权重偏差 (EWB)，通过左右端点的独立操作成为可能。提出了 EWB 来索引到线路两端的相对注意力分配。发现了预期的左偏（伪忽略），EWB 的效应量更大（d = -0.34 在两个会话中）比 DBE（会话 1 中的 -0.22 和会话 2 中的 -0.14）。尽管 EWB 的可靠性略低于 DBE，但它对假性忽视更为敏感，并且端点加权方法具有更多优势，包括可选择额外的非偏侧注意力测量。很大一部分参与者难以遵循具有里程碑意义的任务的说明，这突出表明需要对此任务进行明确的说明和性能检查。这项研究表明，线平分可用于在线测量假性忽视，并提供依据建议任务应定期包括左右端点的独立操作，以便可以执行端点权重分析。