Can grapheme-color synesthesia be induced by hypnosis?
Can grapheme-color synesthesia be induced by hypnosis?
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DOI：
10.3389/fnhum.2014.00220
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发表时间：
2014
影响因子：
2.9
通讯作者：
Ward J
中科院分区：
文献类型：
--
作者：
Anderson HP;Seth AK;Dienes Z;Ward J
字素-颜色联觉是一种知觉体验，其中字素、字母或单词唤起特定的颜色，这些颜色要么在空间上与字素诱导器（投影子类型）重合，要么在其他地方，可能没有明确的空间位置（关联器子类型）。在这里，我们解决了使用催眠色彩暗示是否可以快速产生联觉的问题，以检验“催眠联觉”的可能性，即主观体验到类似于投影仪联觉所经历的色彩幻觉。我们使用“嵌入图形”测试来评估这种干预的效果，其中参与者需要检测由局部图形元素组成的形状（例如正方形）。对于字素-颜色联觉者来说，更好的任务表现与较高比例的被感知为彩色的字素有关。我们发现，与无建议控制条件相比，使用催眠建议时，在此测试中没有表现出任何性能优势。当根据参与者对建议的敏感程度（感知到的彩色试验的数量）将参与者分开时，发现了相同的结果。然而，我们发现，在那些报告了大部分彩色试验的参与者中，准确性和主观报告颜色之间存在关系：准确识别嵌入图形的试验（相对于没有准确识别的试验）与占据更大空间范围的更强烈的颜色的报告相关。总的来说，这意味着催眠颜色仅在形状检测后才被感知，而不是通过基于颜色的感知分组来帮助形状检测。结果表明，催眠引起的颜色与联觉颜色不能直接比较。
Grapheme-color synesthesia is a perceptual experience where graphemes, letters or words evoke a specific color, which are experienced either as spatially coincident with the grapheme inducer (projector sub-type) or elsewhere, perhaps without a definite spatial location (associator sub-type). Here, we address the question of whether synesthesia can be rapidly produced using a hypnotic color suggestion to examine the possibility of “hypnotic synesthesia”, i.e., subjectively experienced color hallucinations similar to those experienced by projector synesthetes. We assess the efficacy of this intervention using an “embedded figures” test, in which participants are required to detect a shape (e.g., a square) composed of local graphemic elements. For grapheme-color synesthetes, better performance on the task has been linked to a higher proportion of graphemes perceived as colored. We found no performance benefits on this test when using a hypnotic suggestion, as compared to a no-suggestion control condition. The same result was found when participants were separated according to the degree to which they were susceptible to the suggestion (number of colored trials perceived). However, we found a relationship between accuracy and subjective reports of color in those participants who reported a large proportion of colored trials: trials in which the embedded figure was accurately recognized (relative to trials in which it was not) were associated with reports of more intense colors occupying a greater spatial extent. Collectively, this implies that hypnotic color was only perceived after shape detection rather than aiding in shape detection via color-based perceptual grouping. The results suggest that hypnotically induced colors are not directly comparable to synesthetic ones.
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DOI：
10.1080/00207148508406652
发表时间：
1985-01-01
影响因子：
1.7
作者：
ACOSTA, E;CRAWFORD, HJ
通讯作者：
CRAWFORD, HJ
DOI：
10.1080/00207144.2011.570652
发表时间：
2011-01-01
影响因子：
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影响因子：
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