“I’d have to see some ID.” People who hear this sentence when it comes to alcohol purchase, only one conclusion remains: “I’m obviously very young.” Some understand it as a compliment, others are annoyed or make your own Occur out of the question. All perfectly understandable, but actually the question should take no one to personally, shows a study.

people to etching easily when it comes to the age of Tourism, is known for a long time. In a recent study in the journal “Royal Society Open Science,” in addition, were the participants in the study, an average of eight years. Such misperceptions could also have significance for police work, the researchers report, such as witness statements about the age of a fugitive offender.

Colin Clifford from the University of New South Wales in Sydney and colleagues wanted to find out why we are in the age estimate is often wrong. To do this, they presented a total of 81 test persons, especially young students, photos of people between the ages of seven and seventy years.

Nearly eleven years

The test persons pass got to see pictures of Australians in three versions: In the Original, pixelated one-third or half-pixelated. The pixels have been distributed across the image. The more pixels were present, the worse the Person was. So the researchers wanted to examine how the estimation accuracy changes at different uncertainty levels.

Each candidate should now rate 84 different photos on a age scale of 1 to 99. Whether their assessment was correct, participants were told during the photo run.

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The worst cuts, as expected, the subjects in the half-pixelated images. Nearly eleven years they were here, on average, in addition. In the case of the slightly less pixelated images, there were just under ten years, in the case of the Original eight.

Younger faces are older estimated

the clarity of The images, however, was not the only decisive factor. The researchers discovered two other significant factors of influence, the specific, the direction in which the candidate verse chätzten: the estimates depended on the accuracy of the age of the Person depicted. So the candidates are young people assessed tend to be old and old people tend to be young.

On the other, the order of the images played an important role. Volunteers have transferred the age of the Person on a photo, namely, the Person in the next image: Saw you first, a young face, they underestimated the age of the Person in the following photo. They saw an old face, overestimated the age of the following Person.

These differences might explain 95 percent of the misperceptions, the researchers write.

their investigation showed that the environment in which people age have to be estimated, have great influence on the accuracy. This is important to know – for dealing with each other in everyday life, but also for police investigations – and, of course, for the seller at the supermarket checkout.

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