You Fan-Huan, Gong Xiu-Mei, Sun Qi
School of Psychology, Zhejiang Normal University, Jinhua, China.
Key Laboratory of Intelligent Education Technology and Application of Zhejiang Province, Zhejiang Normal University, Jinhua, China.
Front Psychol. 2023 Sep 7;14:1248307. doi: 10.3389/fpsyg.2023.1248307. eCollection 2023.
Much work has been done to uncover the mechanisms underlying form and motion information integration. However, no study examined the symmetry of the integration of form and motion across the temporal domain (i.e., serial dependence). In Experiment 1, we presented form and motion displays sequentially. In the form displays, dot pairs were oriented toward one screen position, indicating the form orientation; in the motion displays, dots moved radially outward. Their motion trajectories were oriented toward one screen position, indicating the motion direction. In each trial, participants reported their perceived form orientation after the form display or their perceived motion direction after the motion display. We found that the current trial's perceived motion direction was biased toward the previous trial's form orientation and vice versa, indicating serial dependencies between form orientation and motion direction. In Experiment 2, we changed the form and motion displays' reliability by varying the two displays' dot densities. The results showed that the serial dependence of form orientation on motion direction perception decreased only with increasing the current motion display's reliability; neither the reliability of the previous motion display nor that of the current form display significantly affected the serial dependence of motion direction on form orientation perception. Hence, serial dependencies between form orientation and motion direction were asymmetric. Our across-temporal integrations between form and motion, together with the simultaneous integration of form and motion revealed in the previous studies, depict a comprehensive mechanism underlying the integration of the two pieces of information.
为揭示形状和运动信息整合背后的机制，人们已开展了大量工作。然而，尚无研究考察形状和运动在时间域上的整合对称性（即序列依赖性）。在实验1中，我们依次呈现形状和运动显示。在形状显示中，点对朝向一个屏幕位置定向，指示形状方向；在运动显示中，点沿径向向外移动。它们的运动轨迹朝向一个屏幕位置定向，指示运动方向。在每次试验中，参与者在形状显示后报告其感知到的形状方向，或在运动显示后报告其感知到的运动方向。我们发现，当前试验中感知到的运动方向偏向于前一次试验的形状方向，反之亦然，这表明形状方向和运动方向之间存在序列依赖性。在实验2中，我们通过改变两种显示的点密度来改变形状和运动显示的可靠性。结果表明，形状方向对运动方向感知的序列依赖性仅随着当前运动显示可靠性的增加而降低；前一次运动显示的可靠性和当前形状显示的可靠性均未显著影响运动方向对形状方向感知的序列依赖性。因此，形状方向和运动方向之间的序列依赖性是不对称的。我们在形状和运动之间进行的跨时间整合，以及先前研究中揭示的形状和运动的同时整合，描绘了这两条信息整合背后的一种综合机制。
