Daar Marwan, Wilson Hugh R
Centre for Vision Research, York University , Toronto, Ontario , Canada.
PeerJ. 2016 Jun 2;4:e2068. doi: 10.7717/peerj.2068. eCollection 2016.
Four-dot masking with a common onset mask was recently demonstrated in a fully attended and foveated target (Filmer, Mattingley & Dux, 2015). Here, we replicate and extend this finding by directly comparing a four-dot mask with an annulus mask while probing masking as a function of mask duration, and target-mask separation. Our results suggest that while an annulus mask operates via spatially local contour interactions, a four-dot mask operates through spatially global mechanisms. We also measure how the visual system's representation of an oriented bar is impacted by a four-dot mask, and find that masking here does not degrade the precision of perceived targets, but instead appears to be driven exclusively by rendering the target completely invisible.
最近在一个完全被注视且处于中央凹的目标中展示了使用共同起始掩蔽的四点掩蔽（菲尔默、马丁利和达克斯，2015年）。在此，我们通过直接比较四点掩蔽和环形掩蔽来复制并扩展这一发现，同时探究掩蔽作为掩蔽持续时间和目标 - 掩蔽间隔的函数。我们的结果表明，虽然环形掩蔽通过空间局部轮廓相互作用起作用，但四点掩蔽通过空间全局机制起作用。我们还测量了四点掩蔽对视觉系统中定向条的表征的影响，发现这里的掩蔽不会降低感知目标的精度，而是似乎完全是通过使目标完全不可见来驱动的。
