Keep in touch: The effects of imagined touch support on stress and exploration

Tactile emoticons: Conveying social emotions and intentions with manual and robotic tactile feedback during social media communications

Touch offers important non-verbal possibilities for socioaffective communication. Yet most digital communications lack capabilities regarding exchanging affective tactile messages (tactile emoticons). Additionally, previous studies on tactile emoticons have not capitalised on knowledge about the affective effects of certain mechanoreceptors in the human skin, e.g., the C-Tactile (CT) system. Here, we examined whether gentle manual stroking delivered in velocities known to optimally activate the CT system (defined as 'tactile emoticons'), during lab-simulated social media communications could convey increased feelings of social support and other prosocial intentions compared to (1) either stroking touch at CT sub-optimal velocities, or (2) standard visual emoticons. Participants (N = 36) felt more social intent with CT-optimal compared to sub-optimal velocities, or visual emoticons. In a second, preregistered study (N = 52), we investigated whether combining visual emoticons with tactile emoticons, this time delivered at CT-optimal velocities by a soft robotic device, could enhance the perception of prosocial intentions and affect participants' physiological measures (e.g., skin conductance rate) in comparison to visual emoticons alone. Visuotactile emoticons conveyed more social intent overall and in anxious participants affected physiological measures more than visual emoticons. The results suggest that emotional social media communications can be meaningfully enhanced by tactile emoticons.

It's (a) Shame: Why Poverty Leads to Support for Authoritarianism

The literature has widely discussed and supported the relationship between poverty and support for authoritarian leaders and regimes. However, there are different claims about the mediating mechanism and a lack of empirical tests. We hypothesize that the effect of poverty on support for authoritarianism is mediated by shame: People living in poverty frequently experience social exclusion and devaluation, which is reflected in feelings of shame. Such shame, in turn, is likely to increase support for authoritarianism, mainly due to the promise of social re-inclusion. We support our hypothesis in two controlled experiments and a large-scale field study while empirically ruling out the two main alternative explanations offered in the literature: stress and anxiety. Finally, we discuss how the present findings can support policymakers in efficiently addressing the negative political consequences of poverty.

A narrative review of research linking non-sexual social touch to sleep quality

This narrative review describes the current state of the literature that has examined associations between non-sexual social touch (i.e., affectionate touch, touch therapies, touch with animals and inanimate objects that mimic social touch) and sleep quality. It also highlights areas for future research to clarify the links and to identify underlying mechanisms. Most existing studies have focussed on and shown positive effects of touch therapies (e.g., massage, therapeutic touch) on sleep quality in clinical populations. Although there are fewer studies examining how other forms of social touch are linked with sleep quality, the existing research provides preliminary evidence supporting affectionate touch (e.g., hugging, skin-to-skin contact) and tactile contact with animals (e.g., dogs) and objects that mimic social touch (e.g., robots, weighted blankets) as predictors of better sleep quality, while touch deprivation and touch aversion are associated with worse sleep quality. Informed by the existing literature, we additionally reviewed potential relational-cognitive (e.g., felt-security) and neurobiological (e.g., oxytocin) mechanisms likely to underlie associations between social touch and sleep quality. Overall, current research supports associations between non-sexual social touch and sleep quality. However, future research is needed to establish these links for specific forms of social touch (and in various populations), to test explanatory mechanisms, and to identify boundary conditions. Understanding associations between non-sexual social touch and sleep quality can inform the development of touch-based interventions to improve sleep quality and health.

Breaking the Link Between Negative Emotion and Unhealthy Eating: the Role of Emotion Regulation

Stressful experiences frequently lead to increased consumption of unhealthy foods, high in sugar and fat yet low in nutrients. Can emotion regulation help break this link? In a laboratory experiment (N = 200), participants were encouraged to ruminate on a current, distressing personal problem, followed by instruction to use a specific emotion regulation strategy for managing feelings around that problem (challenge appraisal, relaxation/distraction, imagined social support, no-instruction control). Participants then spent 15 min on an anagram task in which 80% of items were unsolvable-a frustrating situation offering a second, implicit opportunity to use the regulation strategy. During the anagram task they had free access to a snack basket containing various options. Analyses revealed significant differences among regulation conditions in consumption of candy versus healthy snack options; challenge appraisal led to the healthiest snack choices, imagined social support to the least healthy snack choices.

Supplementary Information

The online version contains supplementary material available at 10.1007/s42761-023-00190-5.

Actual Cleaning and Simulated Cleaning Attenuate Psychological and Physiological Effects of Stressful Events

The human mind harbors various mechanisms for coping with stress, but what role does physical behavior play? Inspired by ethological observations of autogrooming activity across species, we offer a general hypothesis: cleaning attenuates effects of stressful events. Preregistered behavioral and psychophysiological experiments ( N = 3,066 in United Kingdom, United States, and Canada) found that (a) concrete visual simulation of cleaning behavior alleviated residual anxiety from a stress-inducing physical scene, an effect distinct from touch, and (b) actual cleaning behavior enhanced adaptive cardiovascular reactivity to a highly stressful context of social performance/evaluation, which provides the first physiological evidence for the attenuation of stress-related effects by cleaning. Overall, actual cleaning and simulated cleaning attenuate effects of physical or psychological stressors, even when they have nothing to do with contamination or disease and would not be resolved by cleaning. Daily cleaning behavior may facilitate coping with stressors like physical risks and psychological threats to the self.

Spousal emotional support and relationship quality buffers pupillary response to horror movies

Being satisfied in marriage provides protective stress buffering benefits to various health complications but the causal mechanisms and speed at which this is accomplished is less well understood. Much of the research on health and marriage has conceptualized marital quality in a unidimensional way, with high levels of either positivity or negativity. This conceptualization may not fully capture the nuanced benefits of marital relationships. Pupillometry is an innovative method which captures the effects of marital stress buffering on the body’s autonomic nervous system in real time; pupil dilation occurs within 200ms to stress exposure. Additionally, this method records hundreds of readings per second, providing precision and sensitivity. This preregistered experiment aimed to conceptually replicate previous pupillometry stress buffering results and extend the previous findings by including a generalizable, real-life stressor—viewing a horror movie—and multidimensional relationship quality effects. Eighty-three couples (166 participants) were quasi-grouped, based on a self-reported multidimensional relationship quality scale, to either supportive or ambivalent marital relationship conditions. They were then randomly assigned to either a spousal support (i.e., handholding) or non-support (spousal absence) condition and watched clips from both horror and nature movies while pupil dilation was measured. Tonic pupillary response results revealed that the horror video clips elicited a stress response and there were significant differences between the support and non-support conditions, as well as marital relationship quality conditions. These results frame the precision, speed, and sensitivity of pupillometry as a potentially fruitful method to investigate the causal mechanisms linking stress buffering and supportive marital relationships.

Randomized controlled evaluation of the psychophysiological effects of social support stress management in healthy women

Considering the high and increasing prevalence of stress, approaches to mitigate stress-related biological processes become a matter of public health. Since supportive social interactions contribute substantially to mental and physical health, we set out to develop a social support stress management intervention and examined its effects on psychophysiological stress responses as well as self-reported stress in healthy women. In a parallel-group randomized controlled trial, registered in the DSRK (DRKS00017427), 53 healthy women were randomly assigned to a social support stress management or a waitlist control condition. All participants underwent a standardized psychosocial stress test where physiological and emotional stress responses were assessed by repeated measurements of cortisol, heart rate, heart rate variability and state anxiety. Also, all participants completed self-report questionnaires of perceived stress and social support at pre-intervention, post-intervention and follow-up four weeks later. Participants in the social support stress management showed a significantly attenuated integrated state anxiety response in comparison to those in the control condition, but conditions did not differ in any of the assessed physiological stress responses. The intervention significantly reduced perceived stress in comparison to the control condition, but perceived stress levels returned to baseline at follow-up. Our results indicated that the intervention had no effect on physiological responses to acute psychosocial stress, even though anxiety responses to stress were attenuated. However, the social support stress management intervention had a significant, albeit transient impact on perceived stress.

Interpersonal Neural Synchronization during Interpersonal Touch Underlies Affiliative Pair Bonding between Romantic Couples

Interpersonal touch plays a key role in creating and maintaining affiliative pair bonds in romantic love. However, the neurocognitive mechanism of interpersonal touch in affiliative pair bonding remains unclear. Here, we hypothesized that interpersonal neural synchronization (INS) during interpersonal touch underlies affiliative pair bonding between romantic couples. To test this hypothesis, INS between heterosexual romantic couples and between opposite-sex friends was measured using functional near-infrared spectroscopy-based hyperscanning, while the pairs of participants touched or vocally communicated with each other. The results showed significantly greater INS between the mentalizing and sensorimotor neural systems of two members of a pair during interpersonal touch than during vocal communication between romantic couples but not between friends. Moreover, touch-induced INS was significantly correlated with the self-reported strength of romantic love. Finally, the results also showed that men's empathy positively modulated the association between touch-induced INS increase and the strength of romantic love. These findings support the idea that INS during interpersonal touch underlies affiliative pair bonding between romantic couples and suggest that empathy plays a modulatory role in the neurocognitive mechanism of interpersonal touch in affiliative pair bonding.

Theoretical Boundary Conditions of Partner Buffering in Romantic Relationships

Attachment insecurity is consequential for both personal and relationship wellbeing. Some research has documented that partner buffering can downregulate insecure individuals' immediate feelings of distress, allowing them to feel more secure at least temporarily. The benefits of partner buffering, however, may be limited by several contextual factors. In this article, we identify boundary conditions that may curb or amplify the benefits of partner buffering for both targets (those who receive buffering) and agents (those who enact buffering). We suggest that motivation, ability, and timing may all affect partner buffering outcomes for targets and agents. If partner buffering is delivered in an adaptive way that does not reinforce the target's insecure tendencies, it may help insecure targets learn that they can trust and depend on their partners (agents), which may facilitate greater security in targets. We recommend that future research consider these contextual factors and examine partner buffering as an inherently dyadic relationship process capable of enhancing attachment security.

Effects of Robot’s Awareness and its Subtle Reactions Toward People’s Perceived Feelings in Touch Interaction

This study addresses the effects of a robot’s awareness and its subtle reactions toward the perceived feelings of people who touch a robot. When another unexpectedly touches us, we subtly and involuntarily react. Because such reactions are involuntary, it is impossible to eliminate them for humans. However, intentionally using them for robots might positively affect their perceived feelings, in particular, when a robot has a human-like appearance that evokes human-like reactions. We investigate the relationship between subtle reactions and the awareness of the existence of a human, i.e., whether a robot’s awareness and its subtle reactions influence people’s impressions of the robot when they touch it. Our experimental results with 20 participants and an android with a female-like appearance showed significant effects between awareness and subtle reactions. When the robot did not show awareness, its subtle reaction increased the perceived human-likeness. Moreover, when the robot did not show subtle reactions, showing awareness beforehand increased the perceived human-likeness.

Gaze-Height and Speech-Timing Effects on Feeling Robot-Initiated Touches

This paper reports the effects of communication cues on robot-initiated touch interactions at close distance by focusing on two factors: gaze-height for making eye contact and speech timing before and after touches. Although both factors are essential to achieve acceptable touches in human-human touch interaction, their effectiveness remains unknown in human-robot touch interaction contexts. To investigate the effects of these factors, we conducted an experiment whose results showed that being touched with before-touch timing is preferred to being touched with after-touch timing, although gaze-height did not significantly improve the feelings of robot-initiated touch.

Survey of Social Touch Interaction Between Humans and Robots

In human-human interaction, social touch provides several merits, from both physical and mental perspectives. The physical existence of robots helps them reproduce human-like social touch, during their interaction with people. Such social touch shows positive effects, similar to those observed in human-human interaction. Therefore, social touch is a growing research topic in the field of human-robot interaction. This survey provides an overview of the work conducted so far on this topic.

Effects of Non-verbal Priming on Attachment-Style Activation

Using an affective priming procedure, two experiments examined the effects of non-verbal cues on activating attachment styles. In Study 1, the secure attachment group, which was primed non-verbally, showed higher levels of self-esteem, interpersonal competence, and positive affect than the insecure attachment group, which was also primed non-verbally. In contrast, no significant difference was found between the two attachment groups that were primed verbally. In Study 2, using a different priming method and adding a neutral group, similar interactions between priming modality (non-verbal or verbal cues) and attachment styles were found: the differences in self-esteem, interpersonal competence, and positive affect between the secure attachment group, neutral group, and insecure attachment group were greater when primed non-verbally than when primed verbally. Finally, the limitations of the research and recommendations for follow-up study are discussed.

Supportive hand-holding attenuates pupillary responses to stress in adult couples

BACKGROUND

Social relationships, particularly marriage, have been shown to ameliorate the potentially pathogenic impact of stressful events but prior research has been mostly aimed at downstream effects, with less research on real-time reactivity. Pupillometry is an innovative procedure that allows us to see the effects of acute stress in real time. The muscles that control pupil size are linked to the autonomic nervous system, so that when stressed, the pupils dilate; this occurs within 200ms. This quick response allows us to see the immediate effects of acute stress on the autonomic nervous system (ANS), and the real-time effects of social support in buffering stress.

PURPOSE

The purpose of this study is to examine the dampening effects of received social support on the ANS's pupillary response.

METHODS

Eighty individuals (40 couples) were randomly assigned to either a spousal support (i.e., spouse hand-holding) or non-support condition (i.e., alone) and administered a Stroop task while pupil dilation was measured.

RESULTS

The Stroop task elicited a stress reaction in terms of pupil dilation in response to the incongruent task trials. Participants in the support condition showed accelerated habituation to the stress task (p < .001), and less pupil reactivity (p < .001) providing evidence for buffering effects of social support via spousal presence and hand-holding.

CONCLUSIONS

These results reveal the speed at which stress-buffering occurs, suggesting that pupillometry could be a good method to address the immediate dampening effects of social support.

The impact of physical proximity and attachment working models on cardiovascular reactivity: Comparing mental activation and romantic partner presence

Close relationships, especially high-quality romantic relationships, are consistently associated with positive physical health outcomes. Attenuated cardiovascular reactivity is one physiological mechanism implicated in explaining these effects. Drawing on attachment and social baseline theories, this experimental study evaluated two potential affiliative cues as mechanisms through which romantic relationships may attenuate cardiovascular reactivity to a laboratory-based stressor. Prior to a cold pressor task, 102 participants were randomly assigned to either have their partner physically present, call upon a mental representation of their partner, or think about their day during the stressor. Consistent with our preregistered hypotheses, participants in both the partner present and mental activation conditions had significantly lower blood pressure (BP) reactivity during the cold pressor task compared to control participants for both systolic (d = -0.54) and diastolic BP (d = -0.53), but no significant differences emerged for heart rate or heart rate variability. Although participants in the partner present and mental activation conditions had similar BP reactivity to the cold pressor task, those in the partner present condition reported significantly less pain as a result of the task. The difference in BP reactivity by condition was moderated-BP reactivity was greater for people with lower self-reported relationship satisfaction. The results suggest that accessing the mental representation of a romantic partner and a partner's presence each buffer against exaggerated acute stress responses to a similar degree.

The importance of relational support for attachment and exploration needs

In this article, we discuss theory and research on social support and caregiving processes in adult close relationships. We first outline key theoretical principles of attachment theory and of a theoretical perspective on thriving through relationships that builds on attachment theory. We then review empirical research that has tested key theoretical postulates regarding the importance of relational support for both attachment and exploration needs. The empirical review is divided into two components that reflect the two major functions of support/caregiving in close relationships, and that reflect the two different life contexts in which relational support/care is crucial (support in adversity and support for exploration and pursuit of opportunities). We conclude by emphasizing important directions for future research.

Hand-in-Hand Combat: Affectionate Touch Promotes Relational Well-Being and Buffers Stress During Conflict

Relational conflict has a considerable impact on relational and personal well-being, but whether that impact is positive or negative depends on how the conflict is managed. Individuals struggle to have constructive conflicts that protect their relationships and avoid excess stress, which can lead to declines in relationship quality over time. The current set of experiments tested whether a brief touch intervention would promote relational well-being and prevent stress during couple conflict discussions. Results indicated that engaging in touch prior to and during conflict was effective to improve couple-members’ conflict behavior and to buffer stress in real (Experiment 1) and imagined (Experiments 2a and 2b) contexts. The results of these experiments suggest that touch may be a simple yet effective intervention for improving couple conflict discussions. In addition, we provide initial evidence that enhanced state security and cognitive interdependence serve as mechanisms underlying these effects.

Keeping in Touch with Context: Non-verbal Behavior as a Manifestation of Communality and Dominance

This research investigated the influence of observed touch on the perceptions of communality and dominance in dyadic interactions. We manipulated four key situational features of haptic behavior in two experiments: the initiation, reciprocity, the degree of formality of touch (Studies 1 and 2), and the context of the interaction (Study 2). The results showed that the default perception of touch, irrespective of whether it is initiated or reciprocated, is the communal intention of the toucher. Furthermore, the initiation of touch was seen as an act of dominance, particularly, when the contact between the actors was primed as being hierarchical. Reciprocation neutralized the perceived asymmetry in dominance, but such inferences seemed to hinge on the fit of the touch with the context: reciprocation of formal touch reduced the asymmetry in the hierarchical context, whereas reciprocation of informal touch reduced the asymmetry in the non-hierarchical context.