School of Psychology, The University of Queensland, St Lucia, 4072, Australia.
J Exp Psychol Hum Percept Perform. 2011 Apr;37(2):588-96. doi: 10.1037/a0018740.
In object substitution masking (OSM) a sparse, temporally trailing 4-dot mask impairs target identification, even though it has different contours from, and does not spatially overlap with the target. Here, we demonstrate a previously unknown characteristic of OSM: Observers show reduced masking at prolonged (e.g., 640 ms) relative to intermediate mask durations (e.g., 240 ms). We propose that with prolonged exposure, the mask's visual representation is consolidated, which allows processing of the lingering target icon to be reinitiated, thereby improving performance. Our findings suggest that when the visual system is confronted with 2 temporally contiguous stimuli, although one may initially gain access to consciousness above the other, the "losing" stimulus is not irreversibly lost to awareness.
在客体替代掩蔽（OSM）中，即使稀疏的、随时间拖尾的 4 点掩蔽与目标具有不同的轮廓且不与目标空间重叠，也会损害目标的识别。在这里，我们展示了 OSM 的一个先前未知的特征：与中间掩蔽持续时间（例如 240 毫秒）相比，观察者在延长（例如 640 毫秒）的掩蔽下显示出较低的掩蔽。我们提出，随着暴露时间的延长，掩蔽的视觉表现得到巩固，这允许重新启动残留目标图标的处理，从而提高性能。我们的发现表明，当视觉系统面临两个时间上连续的刺激时，尽管一个刺激可能最初比另一个刺激更容易进入意识，但“失去”的刺激并没有不可逆转地失去意识。
