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Front Psychol. 2017 Jan 23;8:06. doi: 10.3389/fpsyg.2017.00006. eCollection 2017.

Cultural and Species Differences in Gazing Patterns for Marked and Decorated Objects: A Comparative Eye-Tracking Study.

Author information

1
Department of Education and Psychology, Freie Universität Berlin Berlin, Germany.
2
Experimental Psychology Unit, Helmut Schmidt University - University of the Federal Armed Forces Hamburg Hamburg, Germany.
3
Department of Education and Psychology, Freie Universität BerlinBerlin, Germany; Graduate School "Languages of Emotion", Freie Universität BerlinBerlin, Germany.

Abstract

Objects from the Middle Paleolithic period colored with ochre and marked with incisions represent the beginning of non-utilitarian object manipulation in different species of the Homo genus. To investigate the visual effects caused by these markings, we compared humans who have different cultural backgrounds (Namibian hunter-gatherers and German city dwellers) to one species of non-human great apes (orangutans) with respect to their perceptions of markings on objects. We used eye-tracking to analyze their fixation patterns and the durations of their fixations on marked and unmarked stones and sticks. In an additional test, humans evaluated the objects regarding their aesthetic preferences. Our hypotheses were that colorful markings help an individual to structure the surrounding world by making certain features of the environment salient, and that aesthetic appreciation should be associated with this structuring. Our results showed that humans fixated on the marked objects longer and used them in the structural processing of the objects and their background, but did not consistently report finding them more beautiful. Orangutans, in contrast, did not distinguish between object and background in their visual processing and did not clearly fixate longer on the markings. Our results suggest that marking behavior is characteristic for humans and evolved as an attention-directing rather than aesthetic benefit.

KEYWORDS:

external symbolic storage; eye-tracking; object manipulation; ochre; orangutans

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