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Gewählte Publikation:

Publikationstyp: Nichtpublizierter (nicht zitierfähiger) Beitrag für wissenschaftliche Veranstaltung (A3)
Vortragstyp: Poster

Jahr: 2013

AutorInnen: Park, SY; Ludwig, L; Zsófia, V

Titel: Dog-human similarities and differences in face-processing: Eye movements during free viewing of faces (in progress).

Quelle: 3rd ToK Conference of Compcog ; JUL 3-5, 2013; Vienna, AUSTRIA. 2013.

Autor/innen der Vetmeduni Vienna:

Huber Ludwig
Park Soon Young
Viranyi Zsofia

Beteiligte Vetmed-Organisationseinheiten
Messerli Forschungsinstitut, Abteilung für Vergleichende Kognitionsforschung

The goal of the study is to identify similarities and differences between the eye movement patterns of humans and dogs during con-, allo- and hetero-specific face processing. In social interactions the face is not only important to reflect the information about our identity, gender, age as well as emotional and attentive status, but also to gather this information of others. In humans, processing such information on faces seems effortless and almost immediate. The results of many face perception experiments revealed that this fast face processing might be possible through a holistic processing strategy which heavily uses configuration information of relevant features rather than the information based on all individual features on a face. When the configuration of faces is disrupted, for example by inverting them, subjects had delays and difficulties in recognizing the same faces and individual features. But where do people precisely look to gain such a holistic, overall impression of faces that makes fast and, at the same time, reliable decisions about facial information? Video-based eye tracking studies with relatively long-viewing time (5-10s) have shown that in face recognition tasks the subjects focus mostly on the eye region. Yet other studies that investigated fast face processing (<1s) revealed that the first two saccades suffice for face recognition, and the actual saccade locations are almost in the middle of the nose instead of the eye region. In this way our visual system can probably optimally oversee all facial features instantaneously, and can, thus, rely on holistic processing. Both, similar configuration-dependent differences in task performance and similar patterns of eye movements were observed in non-human primates, reflecting the usage of a holistic face processing strategy also in these species. One single study tested the usage of the strategy in dogs and did so indirectly, by comparing the amount of time viewing upright and inverted faces using the preferential-looking paradigm. No face-specific inversion effect was recorded, pointing to the direction that dogs might not use a holistic strategy for face processing. Total viewing time, however, may be a too rough measurement. As it has been shown in human studies, initial saccades may reveal contradictory findings. Therefore, in our study with highspatial and -temporal resolution eye tracking we investigated the saccade locations during early stage face processing of humans and dogs while watching faces of conspecifics and different species as well as control images. Twenty pairs of dogs and their owners were tested at the Clever Dog Lab in Vienna. In the two experiments of humans and dogs, the same stimuli and experimental procedures were used, except for the training of dogs to cope with the calibration procedure and to familiarize with the eye-tracking system. Our study used the EyeLink 1000 system. The poster reports our experiences with this first attempt of eye tracking in dogs with such high resolution as well as the differences and similarities we found between the eye movement patterns of dogs and humans during face processing.

Face processing, Eye tracking, Dog, Human

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