Yawning has a well documented contagious effect: viewing or hearing a yawn—as well as talking or thinking about yawns—causes human subjects to yawn. While comparative ethological and neurological accounts suggest that yawning is a function of primitive biological structures in the brain stem, these analyses do not account for infectious yawning caused by representational and semantic states. Investigating the relationship between perceptual and cognitive avenues of yawn induction affords a unique opportunity to examine how higher level cognitive faculties interact with (...) involuntary or automated processing systems. In this paper, I examine three distinct attempts to reconcile the cognitive properties of contagious yawning with its physiological basis—one neurological, one philosophical, and one functional. None of these accounts are unproblematic, and the most plausible hypothesis for the evolution of contagious yawning does not satisfactorily explain the cognitive iterations of the phenomenon . I argue that the most likely explanation of the contagion links perceptual elements of witnessed yawns to conceptual representations. More centrally, this kind of integrated account has repercussions for general theories of human thought and rationality, and suggests that higher level representational states engage neurophysiological structures in determining human behavior. (shrink)

The laugh- and/or smile-evoking potency of laughter was evaluated by observing responses of 128 subjects in three undergraduate psychology classes to laugh stimuli produced by a “laugh box.” Subjects recorded whether they laughed and/or smiled during each of 10 trials, each of which consisted of an 18-sec sample of laughter, followed by 42 sec of silence. Most subjects laughed and smiled in response to the first presentation of laughter. However, the polarity of the response changed quickly. By the 10th trial, (...) few subjects laughed and/or smiled, and most found the stimulus “obnoxious.” Although other research has described canned-laughter effects, it did not consider the hypothesis confirmed here, that laughter itself evokes laughter, perhaps by activating a laughter-specific auditory-feature detector. This result is relevant to the neurological basis of social communication, human ethology, and theories of speech production and perception. (shrink)

In their “social contextual view” of emotional mimicry, authors Hess and Fischer (2022) put forward emotional mimicry as a social regulator, considering it a social act, bound to certain affiliative contexts or goals. In this commentary, we argue that the core function of mimicry is to ease predicting conspecifics’ behaviours and the environment, and that as a consequence, this often smoothens social interactions. Accordingly, we make three main points. First, we argue that there is no good reason to believe that (...) the mimicry of negative expressions is fundamentally different than the mimicry of positive or ambiguous or autonomic expressions. Second, we give examples of empirical evidence that mimicry is not always a social act. Third, we show that mimicry has primary benefits for the mimicker. As such, we will briefly summarise and elaborate on the relevant findings in these respects, and propose a comparative, multi-method and ecologically valid approach which can explain the multifaceted character of the phenomenon. (shrink)

Both individuals with diagnosed with Autism Spectrum Disorder and individuals high in psychopathic traits show reduced susceptibility to contagious yawning; that is, yawning after seeing or hearing another person yawn. Yet it is unclear whether the same underlying processes are responsible for the relationship between reduced contagion and these very different types of clinical traits. College Students watched videos of individuals yawning or scratching while their eye movements were tracked. They completed the Interpersonal Reactivity Index, the Autism-Spectrum Quotient, the Psychopathy (...) Personality Inventory-Revised, and the Adolescent and Adult Sensory Processing Disorder Checklist. Both psychopathic traits and autistic traits showed an inverse relationship to contagious yawning, consistent with previous research. However, the relationship between autistic traits and contagious yawning was moderated by eye gaze. Furthermore, participants high in autistic traits showed typical levels of contagious itching whereas adults high in psychopathic traits showed diminished itch contagion. Finally, only psychopathic traits were associated with lower overall levels of empathy. The findings imply that the underlying processes contributing to the disruptions in contagious yawning amongst individuals high in autistic vs. psychopathic traits are distinct. In contrast to adults high in psychopathic traits, diminished contagion may appear amongst people with high levels of autistic traits secondary to diminished attention to the faces of others, and in the absence of a background deficit in emotional empathy. (shrink)