The phenomenology of pareidolia in healthy subjects and patients with left- or right-hemispheric stroke

Pareidolia are perceptions of recognizable images or meaningful patterns where none exist. In recent years, this phenomenon has been increasingly studied in healthy subjects and patients with neurological or psychiatric diseases. The current study examined pareidolia production in a group of 53 stro...

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Vydáno v:Heliyon Ročník 10; číslo 5; s. e27414
Hlavní autoři: Camenzind, M., Göbel, N., Eberhard-Moscicka, A.K., Knobel, S.E.J., Hegi, H., Single, M., Kaufmann, B.C., Schumacher, R., Nyffeler, T., Nef, T., Müri, R.M.
Médium: Journal Article
Jazyk:angličtina
Vydáno: England Elsevier Ltd 15.03.2024
Elsevier
Témata:
Hemispheric stroke
image analysis
Natural images
nervous system diseases
Pareidolia
patients
stroke
Visual illusions
Visual processing
Hemispheric stroke
Visual illusions
Visual processing
Pareidolia
Natural images
ISSN:2405-8440, 2405-8440
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Shrnutí:Pareidolia are perceptions of recognizable images or meaningful patterns where none exist. In recent years, this phenomenon has been increasingly studied in healthy subjects and patients with neurological or psychiatric diseases. The current study examined pareidolia production in a group of 53 stroke patients and 82 neurologically healthy controls who performed a natural images task. We found a significant reduction of absolute pareidolia production in left- and right-hemispheric stroke patients, with right-hemispheric patients producing overall fewest pareidolic output. Responses were categorized into 28 distinct categories, with ‘Animal’, ‘Human’, ‘Face’, and ‘Body parts' being the most common, accounting for 72% of all pareidolia. Regarding the percentages of the different categories of pareidolia, we found a significant reduction for the percentage of “Body parts” pareidolia in the left-hemispheric patient group as compared to the control group, while the percentage of this pareidolia type was not significantly reduced in right-hemispheric patients compared to healthy controls. These results support the hypothesis that pareidolia production may be influenced by local-global visual processing with the left hemisphere being involved in local and detailed analytical visual processing to a greater extent. As such, a lesion to the right hemisphere, that is believed to be critical for global visual processing, might explain the overall fewest pareidolic output produced by the right-hemispheric patients.
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these authors contributed equally to this work and share first authorship.
ISSN:2405-8440
2405-8440
DOI:10.1016/j.heliyon.2024.e27414