The impact of emotional videos and emotional static faces on postural control through a personality trait approach
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RESEARCH ARTICLE
The impact of emotional videos and emotional static faces on postural control through a personality trait approach Angélique Lebert1 · Laurence Chaby2,3 · Chloé Garnot1 · Dorine Vergilino‑Perez1 Received: 24 June 2020 / Accepted: 1 October 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract During social interactions, perception of emotions affects motor behaviour by triggering responses like freezing or approach and avoidance reactions. It is however difficult to get a clear picture of the relationship between emotion and posture as previous studies showed inconsistent results, due to methodological differences on stimuli and/or the postural measures used. In this study, we thoroughly investigate how the perception of emotions affects postural control and action tendencies, by contrasting two types of stimuli (emotional static faces or emotional videos) expressing different types of basic emotions (happy, fear, angry, sad, disgust and neutral). We also take into account some other contributing factors relying on stable individual traits (e.g., extraversion, neuroticism, conscientiousness, empathy, etc) and emotional state (e.g., anxiety). Our results show that dynamic stimuli have a greater impact than static stimuli on postural control. Moreover, a crucial aspect of our work lay in the modulation of the relationship between emotions and posture, by stable individual traits. Keywords Posture · Postural control · Emotion · Personality traits · Approach avoidance
Introduction Emotions are inherently multi-componential and involve a set of cognitive, subjective, physiological and motor changes that depend on the value assigned to the contextual stimulus (‘good for me versus bad for me’) (Mauss et al. 2005). Thus, according to Ochsner and Gross (2014) emotion may be understood as a Perception-Valuation-Action sequence, in which the perceptual stage takes stimuli as inputs. Then, the valuation stage estimates the value of the stimuli according to the individual’s current goals, context, experience or personality. Finally, the action stage comprises motor responses such as peripheral responses, facial expressions or postural adjustments. In this study, we focus on the impact of emotions on motor behaviour by looking at two different Communicated by Francesco Lacquaniti. * Angélique Lebert [email protected] 1
Université de Paris, VAC, 92100 Boulogne‑Billancourt, France
2
Sorbonne Université, Institut des systèmes intelligents et de robotique (ISIR), Paris, France
3
Université de Paris, 92100 Boulogne‑Billancourt, France
aspects of postural adjustments: postural stability and action tendencies. Action tendencies are defined as the ways the body prepares itself to act through approach or avoidance behaviour (Lang et al. 1997; Frijda 2009). In this context, passive viewing task with postural recording is considered as an adequate method to examine the impact of emotion on postural control (Lelard et al. 2019). As action tendencies are most often u
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