Route selection in barrier avoidance.
Route selection in barrier avoidance.
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DOI：
10.1016/j.gaitpost.2020.04.009
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发表时间：
2020-07
期刊：
影响因子：
2.4
通讯作者：
Warren WH
中科院分区：
文献类型：
--
作者：
Baxter BA;Warren WH
Fajen和Warren的转向动力学模型可以通过在每一端添加“路点”来再现人类围绕扩展障碍物的路径-如果选择一个路点来最小化全局路径曲率（Gérin-Lajoie和Warren，2008）。我们提出，航路点选择的行为就像是在两个竞争目标之间进行选择，其中较小的距离（d）和偏差角（β）是首选（Ulrich和Borenstein，1998）。在这里，我们操纵这两个变量来测试路线选择的决定因素。避障中的路径选择如何取决于每个端点的局部距离（d）和偏离角（β）以及全局路径长度（P）和曲率（C）？方法：参与者（实验1 N = 19;实验2 N = 15）在虚拟环境中围绕障碍物行走到可见目标。操纵屏障方向和横向位置，以改变屏障左右两端之间的距离差（Δd）和偏差角（Δβ）。使用混合效应逻辑回归模型分析左/右路线数据，其中Δβ、Δd以及观察到的ΔP和ΔC作为预测因素。Δβ和Δd的主效应显著预测右室反应（p < .001），比ΔP和ΔC（ΔBIC = 29.5）更强。当Δβ和Δd一致时，反应倾向于较小的距离和偏差（88%）;当它们冲突时，反应介于两者之间（65%倾向于较小的β）。在50%机会水平上，Δβ的75%选择阈值为± 1.65°，Δd为0.75 m。在避障过程中，参与者选择一条使航路点的局部距离（d）和偏离角（β）最小化的路线，而不是全局路径长度（P）或路径曲率（C）。这些研究结果支持了这一假设，即路线选择是由竞争的航点，而不是比较计划的路径，以最终目标。
Fajen and Warren’s steering dynamics model can reproduce human paths around an extended barrier by adding ‘waypoints’ at each end – if one waypoint is selected to minimize the global path curvature (Gérin-Lajoie and Warren, 2008). We propose that waypoint selection behaves like a choice between two competing goals, in which the smaller distance (d) and deviation angle (β) is preferred (Ulrich and Borenstein, 1998). Here we manipulate these two variables to test the determinants of route selection. How does route selection in barrier avoidance depend on the local distance (d) and deviation angle (β) of each end, and on global path length (P) and curvature (C)? Methods: Participants (Exp1 N = 19; Exp2 N = 15) walked around a barrier to a visible goal in a virtual environment. Barrier orientation and lateral position were manipulated to vary the difference in distance (Δd) and in deviation angle (Δβ) between the left and right ends of the barrier. Left/Right route data were analyzed using a mixed-effects logistic regression model, with Δβ, Δd, and observed ΔP and ΔC as predictors. The main effects of Δβ and Δd significantly predicted Rightward responses (p < .001), more strongly than ΔP and ΔC (ΔBIC = 29.5). When Δβ and Δd agreed, responses were toward the smaller distance and deviation (88% overall); when they conflicted, responses were in between (65% toward smaller β). The 75% choice threshold for Δβ was ± 1.65°, and for Δd was 0.75 m, from the 50% chance level. During barrier avoidance, participants select a route that minimizes the local distance (d) and deviation angle (β) of the waypoint, rather than the global path length (P) or path curvature (C). These findings support the hypothesis that route selection is governed by competing waypoints, instead of comparing planned paths to the final goal.
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影响因子：
2.4
作者：
Olivier, Anne-Helene;Marin, Antoine;Pettre, Julien
通讯作者：
Pettre, Julien
影响因子：
1.1
作者：
Gérin-Lajoie, M;Richards, CL;McFadyen, BJ
通讯作者：
McFadyen, BJ
DOI：
10.1073/pnas.1016507108
发表时间：
2011-04-26
影响因子：
11.1
作者：
Moussaid, Mehdi;Helbing, Dirk;Theraulaz, Guy
通讯作者：
Theraulaz, Guy
影响因子：
4.3
作者：
Barr, Dale J.;Levy, Roger;Scheepers, Christoph;Tily, Harry J.
通讯作者：
Tily, Harry J.
影响因子：
64.8
作者：
Ooi, TL;Wu, B;He, ZJJ
通讯作者：
He, ZJJ