Xiong Aiping, Proctor Robert W, Zelaznik Howard N
College of Information Sciences and Technology, The Pennsylvania State University, E373 Westgate Building, University Park, PA, 16802, USA.
Department of Psychological Sciences, Purdue University, West Lafayette, IN, USA.
Atten Percept Psychophys. 2019 Jul;81(5):1454-1463. doi: 10.3758/s13414-019-01679-7.
Three experiments used compatible and incompatible mappings of images of eating utensils to test the hypothesis that these images activate affordances for grasping with the corresponding hand when the required response is a key-press. In Experiment 1, stimuli were photographs of a plastic spoon oriented on the horizontal axis, with the handle location varying randomly between left and right. Participants were instructed to respond to the handle or the tip, with a compatible mapping in one trial block and an incompatible mapping in another. A benefit for the compatible mapping was evident when the spoon tip was defined as relevant and a smaller cost when the handle was defined as relevant, suggesting a larger influence of the tip than the handle. In Experiment 2, the stimuli were photographs of bamboo chopsticks, for which the functional end is pointed and the graspable end is squared. East Asian participants familiar with chopsticks showed compatibility effects that did not differ significantly between the two ends. In Experiment 3, the chopstick handles were colored red to make them relatively more distinct than the tips. Both East Asian participants (Experiment 3B) and a more diverse sample (Experiment 3A) showed a benefit of the compatible mapping when the handle was defined as task relevant but not when the functional end was. Altogether, the results provide evidence that left-right location of a visually salient feature is the main factor driving these compatibility effects, rather than the automatic activation of a grasping affordance.
当所需反应为按键时,这些图像会激活用相应手进行抓握的可供性。在实验1中,刺激物是水平放置的塑料勺子的照片,勺子柄的位置在左右之间随机变化。参与者被要求对勺子柄或勺尖做出反应,在一个试验块中使用兼容映射,在另一个试验块中使用不兼容映射。当勺尖被定义为相关时,兼容映射有明显优势;当勺子柄被定义为相关时,劣势较小,这表明勺尖比勺子柄的影响更大。在实验2中,刺激物是竹筷子的照片,其功能端是尖的,可抓握端是方的。熟悉筷子的东亚参与者在两端之间没有显示出显著不同的兼容性效应。在实验3中,筷子柄被涂成红色,使其比筷尖相对更醒目。东亚参与者(实验3B)和更多样化的样本(实验3A)在将勺子柄定义为与任务相关时都显示出兼容映射的优势,但将功能端定义为与任务相关时则没有。总之,结果提供了证据表明视觉上突出特征的左右位置是驱动这些兼容性效应的主要因素,而不是抓握可供性的自动激活。