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. 2023 Mar 4;26(3):727–754. doi: 10.1007/s10071-023-01762-5

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© The Author(s) 2023

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Fig. 6 — Examples of stimuli used in experiments aimed at investigating dog perception of facial expressions, with emotion labels and AOIs selected by the respective authors. A—Areas of Interest—AOIs labelled as “eyes”, “midface”, “mouth”, and “whole face”, adapted from Somppi et al. (2016), B—AOIs labelled as “forehead”, “eyes”, “mouth”, and “face rest”, adapted from Barber et al. (2016)