Ciardo Francesca, Campanini Isabella, Merlo Andrea, Rubichi Sandro, Iani Cristina
Department of Communication and Economics, University of Modena and Reggio Emilia, Viale Allegri 9, 42121, Reggio Emilia, Italy.
Motion Analysis Laboratory, Rehabilitation Department, AUSL of Reggio Emilia, Via Mandriolo Superiore 11, 42015, Correggio, Reggio Emilia, Italy.
Psychol Res. 2018 Sep;82(5):915-928. doi: 10.1007/s00426-017-0868-4. Epub 2017 Apr 25.
Making correct inferences regarding social and individual intentions may be crucial for successful interactions, especially when we are required to discriminate between cooperative and competitive behaviors. The results of previous studies indicate that reach-to-grasp kinematic parameters may be used to infer the social or individual outcome of a movement. However, the majority of the studies investigated this ability by presenting reach-to-grasp movements from a third-person perspective only. The aim of the present study was to assess whether the ability to recognize the intent associated to a reach-to-grasp movement varies as a function of perspective by manipulating the perspective of observation (second- and third-perspective) within participants. To this end, we presented participants with video clips of models performing a reach-to-grasp movement with different intents. The video clips were recorded both from a lateral view (third-person perspective) and from a frontal view (second-person perspective). After viewing the clips, in two subsequent tasks participants were asked to distinguish between social and non-social intentions by observing the initial phase of the same action recorded from the two different views. Results showed that, when a fast-speed movement was presented from a lateral view, participants were able to predict its social intention. In contrast, when the same movement was observed from a frontal view, performance was impaired. These results indicate that the ability to detect social intentions from motor cues can be biased by the visual perspective of the observer, specifically for fast-speed movements.
对社会和个人意图做出正确推断可能对成功互动至关重要，尤其是当我们需要区分合作行为和竞争行为时。先前研究的结果表明，伸手抓握的运动学参数可用于推断动作的社会或个人结果。然而，大多数研究仅从第三人称视角呈现伸手抓握动作来考察这种能力。本研究的目的是通过在参与者内部操纵观察视角（第二人称和第三人称视角）来评估识别与伸手抓握动作相关意图的能力是否因视角而异。为此，我们向参与者展示了模型以不同意图进行伸手抓握动作的视频片段。这些视频片段既从侧面视角（第三人称视角）录制，也从正面视角（第二人称视角）录制。观看片段后，在随后的两项任务中，要求参与者通过观察从两种不同视角录制的同一动作的初始阶段来区分社会意图和非社会意图。结果表明，当从侧面视角呈现快速动作时，参与者能够预测其社会意图。相比之下，当从正面视角观察相同动作时，表现会受损。这些结果表明，从运动线索中检测社会意图的能力可能会受到观察者视觉视角的影响，特别是对于快速动作。
