Departament de Psicologia Bàsica, Universitat de Barcelona, Passeig de la Vall d'Hebron 171, 08035, Barcelona, Spain.
Exp Brain Res. 2010 Apr;202(1):261-4. doi: 10.1007/s00221-009-2127-4. Epub 2009 Dec 30.
In most haptic search tasks, tactile stimuli are presented to the fingers of both hands. In such tasks, the search pattern for some object features, such as the shape of raised line symbols, has been found to be serial. The question is whether this search is serial over all fingers irrespective of the hand, or whether it is serial over the fingers of each hand and parallel over the two hands. To investigate this issue, we determined the speed of static haptic search when two items are presented to two fingers of the same hand and when two items are presented to two fingers of different hands. We compared the results with predictions for parallel and serial search based on the results of a previous study using the same items and a similar task. The results indicate that two fingers of the same hand process information in a serial manner, while two fingers of two different hands process information in parallel. Thus, considering the individual fingers as independent units in haptic search may not be justified, because the hand that they belong to matters.
在大多数触觉搜索任务中，触觉刺激被呈现给双手的手指。在这些任务中，已经发现某些物体特征（例如凸起线符号的形状）的搜索模式是串行的。问题是这种搜索是跨所有手指进行的，而不考虑手的位置，还是在每只手的手指上进行串行搜索，而在两只手上进行并行搜索。为了研究这个问题，我们确定了当两个项目呈现给同一只手的两个手指，以及当两个项目呈现给不同手的两个手指时，静态触觉搜索的速度。我们将结果与基于之前使用相同项目和类似任务的研究结果的并行和串行搜索的预测进行了比较。结果表明，同一只手的两个手指以串行方式处理信息，而两只不同手的两个手指则以并行方式处理信息。因此，在触觉搜索中，将单个手指视为独立单元可能是不合理的，因为它们所属的手很重要。
