Chieffi Sergio, Messina Antonietta, Villano Ines, Valenzano Anna A, Nigro Ersilia, La Marra Marco, Cibelli Giuseppe, Monda Vincenzo, Salerno Monica, Tafuri Domenico, Carotenuto Marco, Cipolloni Luigi, Mollica Maria P, Monda Marcellino, Messina Giovanni
Department of Experimental Medicine, University of Campania "Luigi Vanvitelli"Naples, Italy.
Department of Clinical and Experimental Medicine, University of FoggiaFoggia, Italy.
Front Psychol. 2017 Jun 12;8:983. doi: 10.3389/fpsyg.2017.00983. eCollection 2017.
Previous studies suggested that movement velocity influence space perception. We examined whether healthy participants used velocity information when they were asked to reproduce a previously performed movement. Two experiments were carried out. In Experiment 1, blindfolded participants actively performed an arm movement (criterion movement, CM) at a natural velocity, or quickly, or slowly. After a brief delay, participants were asked to reproduce (reproduction movement, RM) CM-amplitude. No velocity constraints were imposed in making RM. In Experiment 2, CM was performed quickly or slowly. After a brief delay, the participants were asked to reproduce not only CM-amplitude but also CM-velocity. Experiment 1: in Natural condition, RM-velocity did not differ from CM-velocity and the participants accurately reproduced CM-amplitude. Conversely, in Fast and Slow condition, RM-velocities differed from CM-velocities and in Slow condition RM-amplitude was greater than CM-amplitude. Experiment 2: both RM-amplitude and -velocity did not differ from CM-amplitude and -velocity. The present study confirms the view that movement velocity influences selectively space perception and suggests that this influence is stronger for slow than fast movements. Furthermore, although velocity information is crucial in accurately reproducing CM-amplitude, it was not used spontaneously when movements were performed at unnatural velocities.
先前的研究表明，运动速度会影响空间感知。我们研究了健康参与者在被要求重现之前执行的动作时是否会使用速度信息。进行了两项实验。在实验1中，蒙住眼睛的参与者以自然速度、快速或缓慢的速度主动进行手臂动作（标准动作，CM）。短暂延迟后，要求参与者重现（再现动作，RM）CM的幅度。在进行RM时没有施加速度限制。在实验2中，CM以快速或缓慢的速度进行。短暂延迟后，要求参与者不仅重现CM的幅度，还要重现CM的速度。实验1：在自然条件下，RM的速度与CM的速度没有差异，并且参与者准确地重现了CM的幅度。相反，在快速和慢速条件下，RM的速度与CM的速度不同，并且在慢速条件下RM的幅度大于CM的幅度。实验2：RM的幅度和速度与CM的幅度和速度均无差异。本研究证实了运动速度选择性地影响空间感知的观点，并表明这种影响对于慢速运动比快速运动更强。此外，尽管速度信息对于准确重现CM的幅度至关重要，但当以非自然速度执行动作时，它不会被自发使用。
