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Pareidolia Test

YI Yuta Inagawa
HK Hidekazu Kanetaka
AT Akito Tsugawa
SS Shu Sakurai
SS Shuntaro Serisawa
SS Soichiro Shimizu
HS Hirofumi Sakurai
HH Haruo Hanyu
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The pareidolia test was used to determine the presence of hallucinations, a core clinical feature of DLB. The face version of the noise pareidolia test developed by Yokoi et al. (Tohoku University, Japan) was adopted (13). A total of 40 black and white images (16 × 16 cm2) with a spatial frequency of 1/f3 are used in this test, in 8 of which a face is included. All the patients were allowed to undergo training in this test prior to the recording of the results. They were instructed to state whether they observed a face or not on presentation of each image. When the participants observed a face, they were requested to point to it.

The pareidolic illusion rate is defined as the ratio of the total number of images (40) to the number of images that are mistakenly recognized as containing the image of a face (13).

Copyright and License information:  ©2020 Inagawa, Kanetaka, Tsugawa, Sakurai, Serisawa, Shimizu, Sakurai and Hanyu.
This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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