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Yawning: its cycle, its role
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Fetal yawning assessed by 3D and 4D sonography
Le bâillement foetal
Le bâillement, du réflexe à la pathologie
Le bâillement : de l'éthologie à la médecine clinique
Le bâillement : phylogenèse, éthologie, nosogénie
 Le bâillement : un comportement universel
La parakinésie brachiale oscitante
Yawning: its cycle, its role
Warum gähnen wir ?
 
Fetal yawning assessed by 3D and 4D sonography
Le bâillement foetal
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mise à jour du
30 avril 2016
Sci Rep.
2016 Apr 26
Social Presence Diminishes Contagious Yawning
in the Laboratory
Gallup A, Church AM, Miller H, Risko EF, Kingstone A.  
 
Psychology Department, State University of New York at Oneonta, New York, USA  

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All articles about contagious yawning
 
Abstract
Contagious yawning may be a useful measure of social psychological functioning, and thus it is important to evaluate the variables influencing its expression in laboratory settings. Previous research has documented that humans yawn less frequently in crowded environments and when under direct observation, but the impact of social presence on contagious yawning remains unknown. Here we present the first study to systematically alter the degree of social presence experienced by participants in the laboratory to determine its effect on contagious yawning frequency. Our results demonstrate that both implied and actual social presence significantly diminish yawn contagion in comparison to a control condition, indicating a key social component to contagious yawning. These findings provide a framework for pursuing additional research investigating the social factors influencing contagious yawning, while also offering applications for measuring this response in laboratory settings.
 
 
Contagious yawning may be a useful measure of social psychological functioning, and thus it is important to evaluate the variables in uencing its expression in laboratory settings. Previous research has documented that humans yawn less frequently in crowded environments and when under direct observation, but the impact of social presence on contagious yawning remains unknown. Here we present the rst study to systematically alter the degree of social presence experienced by participants in the laboratory to determine its e ect on contagious yawning frequency. Our results demonstrate that both implied and actual social presence signi cantly diminish yawn contagion in comparison to a control condition, indicating a key social component to contagious yawning. These ndings provide a framework for pursuing additional research investigating the social factors in uencing contagious yawning, while also o ering applications for measuring this response in laboratory settings.
 
Yawning is characterized by a powerful gaping of the jaw with inspiration, a brief period of peak muscle contraction, and a passive closure of the jaw with shorter expiration1. Although seemingly indistinguishable in the motor pattern, yawns are elicited in two distinct ways. Unlike spontaneous yawning, which is triggered physiologically perhaps due to modified arousal or state changes associated with brain temperature fluctuations2,3,4, contagious yawning is psychologically driven by sensing or thinking about the action. While spontaneous yawning appears to be widespread among vertebrates5, thus far only humans and a limited number of non-human species have been documented to yawn contagiously.
 
Interest in contagious yawning has grown substantially in recent years, following studies linking individual differences in this response to various measures of perspective taking and empathic processing14,15. The development of this empathic modeling hypothesis has led to research using contagious yawning as a potential dependent measure for assessing empathy in both typically developing and clinical populations. Most recently, it has been reported that individuals scoring higher on a psychopathic personality inventory showed reduced contagious yawning16. Initial reports on the absence of contagious yawning in children with autism spectrum disorder also supported this connection to empathy17,18,19, but subsequent research shows that this result may be a consequence of the reduced tendency for these individuals to attend to others' faces20,21. In addition, at least one study has failed to demonstrate a correlation between empathy and contagious yawning in healthy populations22. A positive connection between contagious yawning and social closeness/affiliation has been reported in a number of studies8,9,10,23,24,25,26,27,28, though it appears to be age-dependent (i.e., juveniles fail to show this effect)29,30 and at least three studies have failed to demonstrate this relationship in adult populations13,31,32. Consequently, the link between contagious yawning and empathy requires further investigation. Nonetheless, the use of contagious yawning could still prove useful for studying social psychological development if a clear social link was established.
 
Previous research has demonstrated that a variety of behavioral responses in both humans and non-human animals can be modulated as a function of social presence, a phenomenon sometimes known as the audience effect33,34,35. Furthermore, under brief periods of social crowding, human and non-human primates often limit forms of social interaction (i.e., the elevator effect)36. To date, the social variables influencing the expression of contagious yawning in humans are relatively unknown. Although previous research has reported that yawning frequency is less common among humans in naturally crowded environments5 and in participants being observed by a researcher in the laboratory37, the impact of social presence on contagious yawning has yet to be formally investigated. Here we present the first study to systematically alter the type of social presence experienced by participants in the laboratory to determine its effect on contagious yawning frequency.
 
One of the defining attributes of research on social presence effects is the wide array of stimuli, other than actual people, that have been demonstrated to induce it (e.g., images of eyes38,39; video cameras40,41; eye trackers42,43). This has led to a critical distinction between two broad types of social presence effects: implied social presence effects and actual social presence effects. In the current experiment we investigate the social component to contagious yawning by presenting stimuli that varied in their degree of social presence. In particular, we compared contagious yawning in an "alone" condition with that behavior in the presence of an image of eyes, a webcam without instructions that it was recording, a webcam with instructions that it was recording, and, finally, an actual person. Thus, the former two manipulations (i.e., eyes, webcam_+_no instructions) merely suggest that the participant is being watched, whereas in the latter two (i.e., webcam with instruction, real person) this notion is made more explicit. In addition, in the case of the latter two manipulations, where the notion that one is being watched is made explicit, we can contrast an implied presence (i.e., a recording webcam) directly with an actual social presence (i.e., a real person). How contagious yawning varies (if at all) across these different types of social presence will provide novel insight into the influence and sensitivity of contagious yawning to the presence of others.
 
Discussion
 
Overall these findings demonstrate that both implied and actual social presence diminishes contagious yawning in a laboratory setting, and in doing so thus suggest that the social environment plays a key role in the expression of this behavior. Although the specific mechanism(s) producing these effects were not under investigation, we believe there are two likely candidates. First, since yawning has been linked with enhanced cortical arousal2, the feeling of being watched could increase levels of arousal to a point that would counteract mechanisms normally triggering yawning. Second, the social stigma associated with displaying this behavior in the presence of others44 could lead to the active inhibition of yawn contagion. The increased urge to yawn without doing so in conditions with greater social presence supports the latter interpretation, but follow-up research could attempt to disentangle the physiological and psychological mechanisms contributing to this effect.
 
With respect to our comparisons between different types of social presence manipulations, the results clearly demonstrated the importance of making the putative "observation" explicit (i.e., there was little effect of eyes or an inactive webcam) and, interestingly, that once the observation is explicit that there was effectively no difference between an implied and actual social presence (i.e., an active webcam and an actual person), at least with respect to the suppression of contagious yawning. The latter effect conceptually replicates earlier research40 and extends it to a new domain. One potential explanation for this pattern of results is that the influence of a social presence is contingent on the conscious activation in working memory of the idea that one is being observed. With an explicit implied social presence (i.e., a recording webcam, CCTV) and an actual person present, this activation is direct whereas in the case of eyes and an inactive webcam this idea would require that the individual spontaneously make an inference to that effect.
 
The view that the influence of a social presence requires conscious activation of the idea that one is being observed draws some support from recent research investigating eye trackers as an implied social presence. Specifically, Nasiopoulus et al.42 demonstrated that eye tracker induced social presence effects43 disappeared if participants wore the eye tracker for a short time before the critical part of the experiment but that it reappeared if, right before that part of the experiment, participants were reminded about the eye tracker. One interpretation of this result is that participants in the former condition, over time, had "forgotten" that they were being observed (i.e., the idea was no longer active in working memory) and that in the latter condition the reminder reactivated this idea. Whether a similar pattern would be observed with an actual social presence remains an open question for future research.
 
In conclusion, this investigation provides a clear link between social presence and contagious yawning, and as such has direct applications for the design of future studies utilizing contagious yawning as a dependent variable45. In particular, since observation cues and recording devices inhibit contagious yawning, future research should control for these factors when seeking to maximize this response. Furthermore, the present study lays the groundwork for further investigations of the effect of social factors on contagious yawning in humans. The current findings support the validity of previous research that has suggested connections with contagious yawning and measures of social cognition, meaning that future studies could explore how individual differences in empathic processing and personality relate to this response. Considering humans display a familiarity bias for contagious yawning (i.e., people yawn more frequently following yawns of friends and family members in comparison to yawns of acquaintances and strangers)24, follow-up studies could also investigate whether the inhibitory social presence effects that we observed in the present study are modulated by the nature of interpersonal relationships.
 
 
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