Alle Publikationen
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2017
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(2017): Social interaction contexts bias the perceived expressions of interactants. In: Emotion (Washington, D.C.) 17 (4), S. 567-571. DOI: 10.1037/emo0000257
DOI: http://www.ncbi.nlm.nih.gov/pubmed/28191995 Abstract: The present study sought to determine whether contextual information available when viewing social interactions from third-person perspectives may influence observers' perception of the interactants' facial emotion. Observers judged whether the expression of a target face was happy or fearful, in the presence of a happy, aggressive, or neutral interactant. In 2 experiments, the same target expressions were judged to be happier when presented in the context of a happy interactant than when interacting with a neutral or aggressive partner. We failed to show that the target expression was judged as more fearful when interacting with an aggressive partner. Importantly, observers' perception of the target expression was not modulated by the emotion of the context interactant when the interactants were presented back-to-back, suggesting that the bias depends on the presence of an intact interaction arrangement. These results provide valuable insight into how social contextual effects shape our perception of facial emotion. (PsycINFO Database Record zitiert von 2
2015
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(2015) : Multimodal affect recognition for naruralistic human-computer and human-robot interactions In: Calvo, Rafael A.; D’Mello, Sidney K.; Gratch, Jonathan; Kappas, Arvid (Hg.): The Oxford handbook of affective computing. Unter Mitarbeit von Rafael A. Calvo, Sidney K. D’Mello, Jonathan Gratch und Arvid Kappas: New York, NY: Oxford University Press (Oxford library of psychology), S. 246-257
Abstract: This chapter provides a synthesis of research on multimodal affect recognition and discusses methodological considerations and challenges arising from the design of a multimodal affect recognition system for naturalistic human-computer and human-robot interactions. Identified challenges include the collection and annotation of spontaneous affective expressions, the choice of appropriate methods for feature representation and selection in a multimodal context, and the need for context sensitivity and for classification schemes that take into account the dynamic nature of affect and the relationship between different modalities. Finally, two examples of multimodal affect recognition systems used in (soft) real-time naturalistic human-computer and human-robot interaction frameworks are presented. (PsycINFO Database Record (c) 2019 APA, all rights reserved)
2013
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(2013): Why are you looking like that? How the context influences evaluation and processing of human faces. In: Social cognitive and affective neuroscience 8 (4), S. 438-445. DOI: 10.1093/scan/nss013
DOI: http://www.ncbi.nlm.nih.gov/pubmed/22287265 Abstract: Perception and evaluation of facial expressions are known to be heavily modulated by emotional features of contextual information. Such contextual effects, however, might also be driven by non-emotional aspects of contextual information, an interaction of emotional and non-emotional factors, and by the observers' inherent traits. Therefore, we sought to assess whether contextual information about self-reference in addition to information about valence influences the evaluation and neural processing of neutral faces. Furthermore, we investigated whether social anxiety moderates these effects. In the present functional magnetic resonance imaging (fMRI) study, participants viewed neutral facial expressions preceded by a contextual sentence conveying either positive or negative evaluations about the participant or about somebody else. Contextual influences were reflected in rating and fMRI measures, with strong effects of self-reference on brain activity in the medial prefrontal cortex and right fusiform gyrus. Additionally, social anxiety strongly affected the response to faces conveying negative, self-related evaluations as revealed by the participants' rating patterns and brain activity in cortical midline structures and regions of interest in the left and right middle frontal gyrus. These results suggest that face perception and processing are highly individual processes influenced by emotional and non-emotional aspects of contextual information and further modulated by individual personality traits. zitiert von 56
Keywords: Affective Valence, Amygdala, Brain Mapping, Brain/physiology, Cerebral Blood Flow, Context, Emotions/physiology, Face Perception, Face/physiology, Facial Expression, FACIAL EXPRESSIONS, Female, Functional Magnetic Resonance Imaging, Fusiform Gyrus, Humans, Magnetic Resonance Imaging/methods, Male, Neuroanatomy, Neurowissenschaften, Pattern Recognition, Visual/physiology, Perception/physiology, Personality Traits, Photic Stimulation/methods, Self Reference, social anxiety -
(2013): Cross-cultural perspectives on emotion expressive humanoid robotic head: Recognition of facial expressions and symbols. In: Int J of Soc Robotics 5 (4), S. 515-527. DOI: 10.1007/s12369-013-0213-z
DOI: https://doi.org/10.1007/s12369-013-0213-z Abstract: Emotion display through facial expressions is an important channel of communication. However, between humans there are differences in the way a meaning to facial cues is assigned, depending on the background culture. This leads to a gap in recognition rates of expressions: this problem is present when displaying a robotic face too, as a robot’s facial expression recognition is often hampered by a cultural divide, and poor scores of recognition rate may lead to poor acceptance and interaction. It would be desirable if robots could switch their output facial configuration flexibly, adapting to different cultural backgrounds. To achieve this, we made a generation system that produces facial expressions and applied it to the 24 degrees of freedom head of the humanoid social robot KOBIAN-R, and thanks to the work of illustrators and cartoonists, the system can generate two versions of the same expression, in order to be easily recognisable by both Japanese and Western subjects. As a tool for making recognition easier, the display of Japanese comic symbols on the robotic face has also been introduced and evaluated. In this work, we conducted a cross-cultural study aimed at assessing this gap in recognition and finding solutions for it. The investigation was extended to Egyptian subjects too, as a sample of another different culture. Results confirmed the differences in recognition rates, the effectiveness of customising expressions, and the usefulness of symbols display, thereby suggesting that this approach might be valuable for robots that in the future will interact in a multicultural environment. (PsycINFO Database Record (c) 2016 APA, all rights reserved)
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