在旋转和摇摆的结构-从-运动刺激中,感知逆转的不同机制
1Division of Perception and Cognition, Department of Psychology, Uppsala University, Uppsala, Sweden.
PloS one
|February 21, 2024
概括
摇摆的随机点结构-来自-运动 (SFM) 导致比旋转的SFM或Necker图形更长时间的稳定感知. 这表明摇摇欲的SFM参与了不同的大脑过程,可能是上下,用于视觉感知.
科学领域:
- 视觉神经科学 视觉神经科学
- 感知心理学 感知心理学
- 计算神经科学是一种计算神经科学.
背景情况:
- 随机点结构-从-运动 (SFM) 允许大脑从2D点运动中感知3D形状.
- 模两可的SFM刺激可以在长时间观看时导致感知逆转.
- 这些逆转被认为涉及神经适应和恢复周期.
研究的目的:
- 调查SFM中感知逆转背后的神经过程.
- 为了比较旋转与摇摆运动对SFM感知的影响.
- 探索自下而上的和自上而下的过程在模两可的感知中的作用.
主要方法:
- 人类参与者看到了旋转的SFM,摇摆的SFM,静态的Necker数字和摇摆的Necker数字.
- 对于每个刺激,稳定感知的持续时间在两个2.5分钟的观看周期内被测量.
- 视觉图像的生动性被评估来衡量自上而下的处理.
主要成果:
- 摇摆的SFM刺激产生了比其他刺激更长的稳定感知持续时间.
- 摇摆SFM的稳定持续时间与其他刺激无关,与旋转SFM和Necker图形之间发现的相关性不同.
- 观察到学习效应,初始偏差在第二个观看组中消失.
结论:
- 摇摆的SFM似乎绕过或关闭了在旋转SFM中看到的自下而上的适应机制.
- 在摇摇欲的SFM中,感知逆转可能更受上下流程的影响.
- 该研究强调了在解决视觉模两可的过程中,自下而上和自上而下的影响之间的复杂相互作用.
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