Perceptual constancy of pareidolias across paper and digital testing formats in neurodegenerative diseases.

This article discusses a study on the use of a digital format for testing pareidolias, which are visual perceptual deficits where ambiguous shapes take on meaningful appearances. The study compared the results of paper-based and digital testing approaches on healthy controls and patients diagnosed with Alzheimer's disease, Dementia with Lewy body disease, and Parkinson's disease. The findings suggest that the illusionary phenomenon of pareidolia is consistent across both paper and digital modalities of testing, and that perceptual constancy is maintained across patient groups. The study also found that pareidolic misperceptions can be stabilized on a digital format, demonstrating a practical way of testing pareidolias on smartphones without compromising the functionality of the test. [Extracted from the article]