When visual metacognition fails: widespread anosognosia for visual deficits.
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| Title: | When visual metacognition fails: widespread anosognosia for visual deficits. |
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| Authors: | Michel, Matthias1 (AUTHOR) mmichel@mit.edu, Gao, Yi2 (AUTHOR), Mazor, Matan3 (AUTHOR), Kletenik, Isaiah4,5 (AUTHOR), Rahnev, Dobromir1,2 (AUTHOR) rahnev@psych.gatech.edu |
| Source: | Trends in Cognitive Sciences. Dec2024, Vol. 28 Issue 12, p1066-1077. 12p. |
| Subjects: | Eye diseases, Brain damage, Anosognosia, Visual fields, Brain abnormalities |
| Abstract: | Anosognosia for visual deficits – cases where significant visual deficits go unnoticed – challenges the view that our own conscious experiences are what we know best. Anosognosia for visual deficits is surprisingly prevalent. For some visual deficits, such as loss of vision in half the visual field (hemianopia), anosognosia is very common. Understanding how anosognosia occurs for visual deficits is a key challenge in metacognition research. There are currently multiple disparate explanations. We propose a framework that builds on previous work and explains how those disparate explanations of anosognosia for visual deficits can fit together. The central idea of our framework is that, for visual metacognition, no news is good news. Anosognosia for visual deficits occurs when the metacognitive system does not take into account error signals, either because they fail to propagate or because of a metacognitive deficit. Anosognosia for visual deficits – cases where significant visual deficits go unnoticed – challenges the view that our own conscious experiences are what we know best. We review these widespread and striking failures of awareness. Anosognosia can occur with total blindness, visual abnormalities induced by brain lesions, and eye diseases. We show that anosognosia for visual deficits is surprisingly widespread. Building on previous accounts, we introduce a framework showing how apparently disparate forms of anosognosia fit together. The central idea is that, to notice a deficit, individuals need to form expectations about normal vision, compare expectations and visual input, and judge any mismatch at the metacognitive level. A failure in any of these three steps may lead to unawareness of visual deficits. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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