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You are here: Home / Forensic Sciences / Photo selection study reveals we don’t look like we think we look

Photo selection study reveals we don’t look like we think we look

30 July 2015 da admin Leave a Comment

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This is one of the findings of a study by Dr David White and colleagues from the UNSW Australia published in the British Journal of Psychology. The study was supported by an Australian Research Council grants and funding from the Australian Passport Office.

Dr White said: “In face-to-face encounters with unfamiliar people, it is often necessary to verify that we are who we claim to be. For example, we are asked to prove our identity when processing financial transactions and crossing borders. In these and many other commonplace situations, photo-ID is the most common method for identity verification. However, despite the clear importance of this visual task previous research has shown that we are quite poor when matching photos of unfamiliar faces.”

In the study an initial group of over 130 undergraduate students downloaded 10 suitable photos of themselves from Facebook and ranked them in order of the best to worst likeness. These participants took part in a minute long web cam video of their face and two still photos were also taken (one smiling, one neutral).

Sixteen participants who did not know the students watched the webcam videos and afterwards ranked the Facebook photos in order of resemblance to the person they had seen in the video. A further 73 participants were then recruited to complete an online face matching test.

Results of the study show that the unfamiliar participants chose a different set of ‘good likeness’ images compared to those that people had selected of themselves. Surprisingly, the images selected by strangers also led to better performance on the online face matching test. The size of the advantage in other-selection over self-selection was quite large – self-selected images were matched seven per cent less accurately compared to other-selected images.

Dr White said: “It seems counter-intuitive that strangers who saw the photo of someone’s face for less than a minute were more reliable at judging likeness. However, although we live with our own face day-to-day, it appears that knowledge of one’s own appearance comes at a cost. Existing memory representations interfere with our ability to choose images that are good representations or faithfully depict our current appearance.

“Interestingly we also noted there were better results when people were smiling in the photos. It is interesting that current passport guidelines prohibit smiling in photographs because this ‘distorts the normal facial features’. Given that faces are generally pictured smiling, and these images are rated as being more like familiar faces, it may be beneficial to permit expression in passport photographs.”

Story Source: British Psychological Society (BPS)

Source: Science Daily

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Filed Under: Forensic Sciences, Psychology

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