Page 203 - Emotions through the eyes of our closest living relatives- Exploring attentional and behavioral mechanisms

Appendix B
Supplementary Materials for Chapter 4
Appendix to stimuli
Table S1. Definitions of emotion categories of bonobo and human stimuli.
Appendices
Picture category
Distress
Sex
Playing Grooming Yawning
Neutral
bonobo
Aggressive displays, such as long and short charges, mutual and direct displays; submissive behaviours such as grin faces, fleeing, and crouching
Mating, genito-genital rubbing, masturbation, prominent full swelling, penile erection
Together or alone, with a relaxed open mouth, without an object
Two or more individuals grooming with close physical contact
Wide open mouth with or without canine visibility
Walking, lying down, or sitting
human
Fearful displays (wide-open eyes, raised eye brows, open mouth) which may include crying and embracing
Man and woman in underwear romantically embracing and/or kissing, no genitals or penetration visible
See bonobo
Two or more individuals in close physical contact, hugging, smiling, or brushing hair
Wide open mouth with or without teeth visible
Walking, lying down, sitting, running, cycling
Table S2. Overview of number of individuals, adults, juveniles, males and females per picture category for bonobo stimuli
Picture category
Distress Sex Play Groom Yawn Neutral
No. of No. of adults No. of juveniles No. of females* No. of males* individuals / infants
M SD M SD M SD M SD M SD
1.22 0.44 1.80 1.23 1.88 0.99 2.50 0.85 1.00 0.00 1.75 1.21
0.67 0.71 1.50 0.97 0.63 0.74 2.10 0.74 0.91 0.30 1.23 0.81
0.56 0.53 0.30 0.67 1.25 0.71 0.40 0.52 0.09 0.30 0.52 0.90
0.78 0.44 1.20 1.03 1.00 0.93 1.80 0.79 0.18 0.40 0.98 0.84
0.44 0.53 0.60 0.52 0.88 0.83 0.70 0.95 0.82 0.40 0.77 0.86
* Since stimuli were collected from the internet, it was not always possible to deduct whether an individual was male or female (e.g., when only part of the body was visible).
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