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Chinese researchers describe impaired self-face recognition in those with major depressive disorder
Date:7/16/2014

type of special social stimulus. Self-face processing plays a vitally important role in the study of complex conceptions of self.

Some researchers have proposed that self-face recognition might help in the understanding of processing self-related information relative to other types of cognitive processing. The ability to identify one's own face is generally defined as self-face recognition (SFR), which is considered to be an indicator of self-awareness. The present study is the first to use this paradigm to explore self-face recognition abilities in depressed patients.

A total of 18 depressed patients and 20 healthy subjects participated in this experiment. We used a digital camera to take pictures of all participants under controlled conditions. All pictures were frontal views of participant faces and were processed using Adobe Photoshop CS software. Morphed faces were generated using photo-morphing software. We mixed the features of any two of the three types of faces (self-face, famous face and stranger face) along 5% intervals. In addition, images from each task condition were randomly combined into four "mosaic" images (scrambled faces) for use as control images in one task (as shown in the Fig. 1). Finally, the test sequence of the three specified tasks was random and participants were instructed to make a two-alternative forced-choice to identify the identity of morphed faces.

The percentage of morphing at the switching point was defined as a threshold in the task based on the judgment of morphing faces in different tasks for participants. It can be used to measure the recognition ability for one face relative to the other. Face identification accuracy across groups was analyzed using repeated-measure ANOVA. There was a significant main effect of the group (P = 0.01). The main effect of the task was not significant (P = 0.683) and a non-significant interaction effect between the group and types of bias (P = 0.282) was also found.
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Contact: Jia Hongxiao
jhxlj@ccmu.edu.cn
Science China Press
Source:Eurekalert  

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Chinese researchers describe impaired self-face recognition in those with major depressive disorder
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