Page 68 - Emotions through the eyes of our closest living relatives- Exploring attentional and behavioral mechanisms
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Chapter 3
Figure 1. Examples per stimulus category depicting bonobos or humans.
* Note: aggression was only used in adults, and replaced by bullying in the child version of the task. Sex was removed from the child version.
In the current study, we investigated how humans perceive scenes which are relevant for bonobos and thus kept these scene categories consistent with our previous work. To examine the differences in attentional bias when expressions are produced by bonobos and humans, we created a human dataset equivalent to the bonobo one (Van Berlo et al., 2020a) (Figure 1). The stimulus set included people yawning or self-scratching, two highly contagious behaviors (Campbell & de Waal, 2011; Palagi et al., 2014; Swithenbank et al., 2016). Play scenes showed adults and/or children immersed in playful interactions. For the category grooming we used images of humans embracing each other or combing or braiding each other’s hair. The category sex showed a man and a woman in an intense, erotic embrace (without depicting their genitalia). The neutral category showed people walking or sitting. The distress
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