Navigation and pointing errors in non-metric environments.
Navigation and pointing errors in non-metric environments.
复制标题
非公制环境中的导航和指向错误。
DOI：
10.1167/17.10.721
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发表时间：
2017
影响因子：
1.8
通讯作者：
Muryy A
中科院分区：
文献类型：
--
作者：
Muryy A
Schnapp和Warren（VSS 2007 doi：10.1167/7.9。758)研究表明，虚拟迷宫中的观察者可以成功地在记忆中的物体之间导航，尽管存在“虫洞”，可以在参与者没有注意到的情况下将参与者从一个位置带到另一个位置，这使得不可能重建迷宫的一致度量地图。在我们的实验中，沉浸式虚拟现实的参与者必须按照指定的顺序收集4个彩色目标。目标被放置在一个虚拟迷宫中，隐藏在矮墙后面，以便参与者必须靠近才能看到并收集它们。从最后一个目标开始，参与者必须指向其他目标的方向。有5个重复具有相同的目标顺序（“学习”阶段）和三个重复具有不同的目标顺序，其中目标对之间的最短路线往往是不同的学习路线。我们在两种不同的迷宫配置中测试了参与者，并且对于每种迷宫配置，我们都用0，1或3个虫洞进行了测试。虫洞增加了迷宫中成对位置之间的长度和转弯数量，但没有改变拓扑结构。在学习阶段之后，参与者可以有效地通过迷宫：参与者在97%的情况下选择了最短的路线，83%和75%的情况下选择了1个和3个虫洞。然而，指向精度受到虫洞的严重影响。对于0个、1个和3个虫洞，指向误差的标准差分别为13、47和51，这种扩散取决于一对目标之间的路线是否与度量重建（19）一致（49）。参与者不能对两个任务使用单一的表示;至少，他们使用的度量信息的范围取决于他们设置的任务。
Schnapp and Warren (VSS 2007 doi: 10.1167/7.9. 758) showed that observers in a virtual maze could navigate successfully between remembered objects despite the presence of'wormholes' that took participants from one location to another without the participant noticing and which made it impossible to reconstruct a consistent metric map of the maze. In our experiment, participants in immersive virtual reality had to collect 4 coloured targets in a specified order. Targets were placed in a virtual maze, hidden behind low walls so that the participant had to come close to see and collect them. From the last target, participants had to point in the direction of the other targets. There were 5 repeats with the same target order ('learning'phase) and three repeats with a different target order where the shortest route between pairs of targets was often different from the learned routes. We tested participants in two different maze configurations and for each we tested them with 0, 1 or 3 wormholes. The wormholes increased the length and number of turns between pairs of locations in the maze but did not alter the topological structure. After the learning phase, participants could navigate through the labyrinth efficiently: participants chose the shortest routes in 97% cases for metric scenes, 83% and 75% with 1 and 3 wormholes. However, pointing accuracy was severely affected by the addition of wormholes. The standard deviation of the pointing errors was 13, 47 and 51 for 0, 1 and 3 wormholes and this spread depended whether the route between a pair of targets was consistent with a metric reconstruction (19) or not (49). Participants may not use a single representation for both tasks; at least, the extent of metric information they use depends on the task they are set.