Habacha Hamdi, Moreau David, Jarraya Mohamed, Lejeune-Poutrain Laure, Molinaro Corinne
Laboratoire Psychologie de la Perception (UMR CNRS 8242), 45 rue des Saints Pères, 75006, Paris, France.
Université de Caen Basse-Normandie CesamS, EA 4260, UNICAEN, 14032, Caen, France.
Exp Brain Res. 2018 Jan;236(1):275-284. doi: 10.1007/s00221-017-5125-y. Epub 2017 Nov 11.
The effect of stimuli size on the mental rotation of abstract objects has been extensively investigated, yet its effect on the mental rotation of bodily stimuli remains largely unexplored. Depending on the experimental design, mentally rotating bodily stimuli can elicit object-based transformations, relying mainly on visual processes, or egocentric transformations, which typically involve embodied motor processes. The present study included two mental body rotation tasks requiring either a same-different or a laterality judgment, designed to elicit object-based or egocentric transformations, respectively. Our findings revealed shorter response times for large-sized stimuli than for small-sized stimuli only for greater angular disparities, suggesting that the more unfamiliar the orientations of the bodily stimuli, the more stimuli size affected mental processing. Importantly, when comparing size transformation times, results revealed different patterns of size transformation times as a function of angular disparity between object-based and egocentric transformations. This indicates that mental size transformation and mental rotation proceed differently depending on the mental rotation strategy used. These findings are discussed with respect to the different spatial manipulations involved during object-based and egocentric transformations.
刺激大小对抽象物体心理旋转的影响已得到广泛研究，但其对身体刺激心理旋转的影响在很大程度上仍未得到探索。根据实验设计，对身体刺激进行心理旋转可引发基于物体的变换，主要依赖视觉过程，或自我中心变换，这通常涉及具身运动过程。本研究包括两项心理身体旋转任务，分别需要进行异同判断或方向判断，旨在分别引发基于物体的或自我中心的变换。我们的研究结果显示，仅在角度差异较大时，大尺寸刺激的反应时间比小尺寸刺激的短，这表明身体刺激的方向越不熟悉，刺激大小对心理加工的影响就越大。重要的是，在比较大小变换时间时，结果显示基于物体的变换和自我中心的变换的大小变换时间模式随角度差异而不同。这表明心理大小变换和心理旋转根据所使用的心理旋转策略而有所不同。我们将结合基于物体的变换和自我中心的变换过程中涉及的不同空间操作来讨论这些发现。
