Is blindsight possible under signal detection theory? Comment on Phillips (2021)

Psychological Review 128 (3):585-591 (2021)
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Phillips argues that blindsight is due to response criterion artefacts under degraded conscious vision. His view provides alternative explanations for some studies, but may not work well when one considers several key findings in conjunction. Empirically, not all criterion effects are decidedly non-perceptual. Awareness is not completely abolished for some stimuli, in some patients. But in other cases, it was clearly impaired relative to the corresponding visual sensitivity. This relative dissociation is what makes blindsight so important and interesting.

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Matthias Michel
Massachusetts Institute of Technology