Visual experience forms a multidimensional pattern that is not reducible to a single measure: Evidence from metacontrast masking
Visual experience forms a multidimensional pattern that is not reducible to a single measure: Evidence from metacontrast masking
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视觉体验形成了一种多维模式，无法简化为单一度量：来自元对比掩蔽的证据
DOI：
10.1167/jov.20.3.2
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发表时间：
2020
影响因子：
1.8
通讯作者：
Thorsten Albrecht
中科院分区：
文献类型：
--
作者：
Nora Koster;U. Mattler;Thorsten Albrecht
一个元对比掩蔽范式提供证据，我们的视觉经验的丰富性和多样性。正方形和菱形的目标，其次是正方形和菱形的面具在不同的刺激起始时间（SOA），导致形状一致和形状不一致的试验。在实验1中，参与者在每次试验中报告他们如何感知目标和面具。经过扩展训练后，目标的七个不同方面可以区分为特定的知觉在这个元对比掩蔽范式。这些感知包括两个刺激之间的时间距离，目标的感知对比度，以及由目标和掩模之间的相互作用产生的运动感知。受试者自发地报告了这些感知，报告的频率随着SOA和目标与面具之间的一致性而系统地变化。在实验2中，我们训练了一组新的参与者来区分这些目标感知。同样，报告的频率的具体感知SOA和一致性的变化，就像在实验1。在最后一次会议中，我们测量了客观区分性能，从而在SOA中产生了典型的个体不同的掩蔽函数。主观感知和客观的歧视性能的报告频率之间的关系的检查发现这些措施之间的多重分离。结果表明，多元对比下的主观经验，这是反映在分离的主观和客观的视觉意识的措施的多维模式。因此，意识不能通过单一的措施进行详尽的评估，从而挑战使用简单的一维主观或客观的措施在视觉掩蔽。
A metacontrast masking paradigm was employed to provide evidence for the richness and diversity of our visual experience. Square- and diamond-shaped targets were followed by square- and diamond-shaped masks at varying stimulus onset asynchronies (SOAs), resulting in shape-congruent and shape-incongruent trials. In Experiment 1, participants reported in each trial how they perceived target and mask. After extended training, seven different aspects of the target could be distinguished as specific percepts in this metacontrast masking paradigm. These percepts encompass aspects including the temporal distance between both stimuli, the perceived contrast of the target, and motion percepts resulting from the interplay between the target and mask. Participants spontaneously reported each of these percepts, and the frequency of reports varied systematically with SOA and the congruency between target and mask. In Experiment 2, we trained a new group of participants to distinguish each of these target percepts. Again, the frequency of reports of the specific percepts varied with SOA and congruency, just as in Experiment 1. In a last session, we measured objective discrimination performance yielding the typical individually different masking functions across SOAs. An examination of the relation between the frequencies of reports of subjective percepts and objective discrimination performance revealed multiple dissociations between these measures. Results suggest a multidimensional pattern of subjective experiences under metacontrast, which is reflected in dissociated subjective and objective measures of visual awareness. As a consequence, awareness cannot be assessed exhaustively by a single measure, thus challenging the use of simple one-dimensional subjective or objective measures in visual masking.
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影响因子：
19.9
作者：
Cohen MA;Dennett DC;Kanwisher N
通讯作者：
Kanwisher N
影响因子：
3.3
作者：
Fleischhauer, Monika;Miller, Robert;Albrecht, Thorsten
通讯作者：
Albrecht, Thorsten
DOI：
10.1073/pnas.0931489100
发表时间：
2003-05-13
影响因子：
11.1
作者：
Vorberg, D;Mattler, U;Schwarzbach, J
通讯作者：
Schwarzbach, J
影响因子：
1.8
作者：
Szczepanowski, Remigiusz;Pessoa, Luiz
通讯作者：
Pessoa, Luiz
影响因子：
2.4
作者：
Albrecht, Thorsten;Mattler, Uwe
通讯作者：
Mattler, Uwe