r*****a
发帖数: 27155 | 1 Main focus on spontaneous behavior of dogs
Typically animals' ability to discriminate different individuals has been
studied by training the animals to discriminate photographs of familiar and
strange individuals. The researchers, led by Professor Outi Vainio at the
University of Helsinki, tested dogs' spontaneous behavior towards images --
if the dogs are not trained to recognize faces are they able to see faces in
the images and do they naturally look at familiar and strange faces
differently?
"Dogs were trained to lie still during the image presentation and to perform
the task independently. Dogs seemed to experience the task rewarding,
because they were very eager to participate" says professor Vainio. Dogs'
eye movements were measured while they watched facial images of familiar
humans and dogs (e.g. dog's owner and another dog from the same family)
being displayed on the computer screen. As a comparison, the dogs were shown
facial images from dogs and humans that the dogs had never met.
Dogs preferred faces of familiar conspecifics
The results indicate that dogs were able to perceive faces in the images.
Dogs looked at images of dogs longer than images of humans, regardless of
the familiarity of the faces presented in the images. This corresponds to a
previous study by Professor Vainio's research group, where it was found that
dogs prefer viewing conspecific faces over human faces.
Dogs fixed their gaze more often on familiar faces and eyes rather than
strange ones, i.e. dogs scanned familiar faces more thoroughly.
In addition, part of the images was presented in inverted forms i.e. upside-
down. The inverted faces were presented because their physical properties
correspond to normal upright facial images e.g. same colors, contrasts,
shapes. It's known that the human brain process upside-down images in a
different way than normal facial images. Thus far, it had not been studied
how dogs gaze at inverted or familiar faces. Dogs viewed upright faces as
long as inverted faces, but they gazed more at the eye area of upright faces
, just like humans.
This study shows that the gazing behavior of dogs is not only following the
physical properties of images, but also the information presented in the
image and its semantic meaning. Dogs are able to see faces in the images and
they differentiate familiar and strange faces from each other. These
results indicate that dogs might have facial recognition skills, similar to
humans.
zz from sciencedaily | x********u
发帖数: 15396 | 2 interesting
wonder if dogs can tell twins apart just by photos. lol | r*****a
发帖数: 27155 | 3 哈哈，这个想法有意思
【在 x********u 的大作中提到】
: interesting
: wonder if dogs can tell twins apart just by photos. lol
| d******t
发帖数: 280 | 4 是真的，我家Harley就认得出我的照片。我有张大头照像通缉令一样贴在我家冰箱上，
harley经常探头去看，看看照片看看我。。很搞笑。。
and
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in
【在 r*****a 的大作中提到】
: Main focus on spontaneous behavior of dogs
: Typically animals' ability to discriminate different individuals has been
: studied by training the animals to discriminate photographs of familiar and
: strange individuals. The researchers, led by Professor Outi Vainio at the
: University of Helsinki, tested dogs' spontaneous behavior towards images --
: if the dogs are not trained to recognize faces are they able to see faces in
: the images and do they naturally look at familiar and strange faces
: differently?
: "Dogs were trained to lie still during the image presentation and to perform
: the task independently. Dogs seemed to experience the task rewarding,
| Y****a
发帖数: 17170 | 5
and
-
in
perform
Jacob经常对着镜子中的我发呆。呵呵
【在 r*****a 的大作中提到】
: Main focus on spontaneous behavior of dogs
: Typically animals' ability to discriminate different individuals has been
: studied by training the animals to discriminate photographs of familiar and
: strange individuals. The researchers, led by Professor Outi Vainio at the
: University of Helsinki, tested dogs' spontaneous behavior towards images --
: if the dogs are not trained to recognize faces are they able to see faces in
: the images and do they naturally look at familiar and strange faces
: differently?
: "Dogs were trained to lie still during the image presentation and to perform
: the task independently. Dogs seemed to experience the task rewarding,
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