Kappers Astrid M L
Department of Human Movement Sciences, VU Amsterdam, Amsterdam, 1081 BT, The Netherlands.
Sci Rep. 2018 Feb 14;8(1):3001. doi: 10.1038/s41598-018-21415-9.
Many studies have already shown that a large idiosyncratic orientation difference is needed to perceive two bars that are far apart as haptically parallel. There exist also strong indications that if such bars are imagined to be minute hands of clocks, errors made in clock time estimates and clock time settings are much smaller. The current study investigated this seemingly discrepancy. Participants partook in three experiments: parallel setting, clock time estimate and clock time setting, in this order. As the individual parallel settings were used in the subsequent clock time estimate experiment, and the estimated clock times in the clock time setting experiment, the deviations could be compared directly. In all three experiments, the deviations were systematic and idiosyncratic, and consistent with a biasing influence of an egocentric reference frame. However, the deviations in the two clock time experiments were indeed much smaller than in the parallel setting experiment. Task instruction and strengthened focus on an allocentric reference frame are the most likely explanations. These findings provide fundamental insights in the processing of spatial information. Taking these findings into account when designing haptic devices may make these more intuitive.
许多研究已经表明，要将相距较远的两条线触觉感知为平行，需要很大的个体特异取向差异。也有强有力的迹象表明，如果将这样的线想象成时钟的分针，在时钟时间估计和时钟时间设置中所犯的错误会小得多。当前的研究调查了这一看似矛盾的现象。参与者依次参与了三个实验：平行设置、时钟时间估计和时钟时间设置。由于在随后的时钟时间估计实验中使用了个体的平行设置，以及在时钟时间设置实验中使用了估计的时钟时间，因此可以直接比较偏差。在所有这三个实验中，偏差都是系统性的且具有个体特异性，并且与以自我为中心的参考框架的偏差影响一致。然而，两个时钟时间实验中的偏差确实比平行设置实验中的小得多。任务指令以及对以外在为中心的参考框架的更强关注是最有可能的解释。这些发现为空间信息处理提供了基本见解。在设计触觉设备时考虑这些发现可能会使这些设备更直观。
