A closer look at four-dot masking of a foveated target

作者：Daar Marwan; Wilson Hugh R

来源：PeerJ, 2016, 4: e2068.

DOI：10.7717/peerj.2068

• Masking
• Object substitution masking
• Four-dot masking
• Spatial vision
• Psychophysics
• Neuroscience
• Psychiatry and Psychology

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.

• 出版日期2016-6-2