Smile dynamics: A comparative study of Fijians and NZ Europeans.

BACKGROUND: The Fijian 'Bula Smile' is often described as the world's friendliest; however, its description remains anecdotal. OBJECTIVE: This study aimed to describe and compare the dynamics of Fijians' smiles with those of New Zealand Europeans. METHODS: An observational study was conducted on two ethnic groups, Fijians (FJ; N = 23) and New Zealand Europeans (NZ; N = 23), age- and gender-matched. All participants were asked to watch amusing videos, and their reactions were video recorded. The videos were analysed by software to assess the frequency, duration, intensity and genuineness of smiling episodes. Based on the Facial Action Coding System, Action Unit 6 (AU6-cheek raiser), Action Unit 12 (AU12-lip corner puller) and Action Unit 25 (AU25-lips apart) were assessed. Data were analysed by generalised linear models after adjusting for personality traits. RESULTS: Fijians smiled longer than New Zealand Europeans (+19.9%; p = .027). Mean intensity of AU6 (+1.0; 95%CIs = 0.6-1.5; p < .001), AU12 (+0.5; 95%CIs = 0.1-0.9; p = .008) and AU25 (+22.3%; 95%CIs = 7.3%-37.3%; p = .005) were significantly higher in FJ group than the NZ group. CONCLUSION: Smiling features of Fijians and New Zealanders showed objective differences, the most distinctive being a higher activation of the Duchenne's marker (AU6) in the Fijian group, which is regarded as a sign of smile genuineness.

Where is an emotion? Using an emotional spatial cueing task to test for emotional localization following targeted visceroception.

The relationship between emotion and attention is vital for adaptation. Trained attention to bodily sensations can heighten emotional awareness, including during "visceroception" (sensing the viscera, principally the heart, lungs and gut), which has been linked to emotion intensity and regulation. However, it is not always clear when bodily attention is adaptive, and useful to maintain, or maladaptive and best inhibited. The current study, part of a wider exploratory project, investigates "localized emotion" in this context. Localized emotion is a novel construct, articulated within the project, and suggested to be manifested within a visceroceptive system: targeted visceroception could result in disinhibited attention to localized emotion. In particular, whilst evidence points to the importance of the gastrointestinal tract for emotion (e.g., gut biome, enteric nervous system), gut sensations are often barely detectable, consistent with an inhibition process. An emotional spatial cueing task was used to test for localized effects within several groups: one trained for 8 weeks to focus on their lower abdomen (gastroception), with another focused on their chest cavity (cardioception), plus a control group. The spatial cueing task involved rapid responding to the detection of bodily feelings following the presentation of an emotional picture. Participants then indicated on a body map where they had detected the feeling, followed by corresponding valence and arousal levels (i.e., core affect) on a self-assessment manikin. Data were analyzed using generalized estimating equations. There was some support for localization in the gastroception group relative to the chest-focused group and controls. Gastroception-related findings included: greater improvement in interoception (interoceptive sensibility), slowed reaction times, a cluster of lower abdominal detections on a body map, changes in core affect, and indications of improved emotion regulation. Attending to the gut may play a key role in improving one's ability to access emotional feeling, with associated implications for emotion regulation.

Generalized morality culturally evolves as an adaptive heuristic in large social networks.

Why do people assume that a generous person should also be honest? Why do we even use words like "moral" and "immoral"? We explore these questions with a new model of how people perceive moral character. We propose that people vary in the extent to which they perceive moral character as "localized" (varying along many contextually embedded dimensions) versus "generalized" (varying along a single dimension from morally bad to morally good). This variation might be partly the product of cultural evolutionary adaptations to different kinds of social networks. As networks grow larger, perceptions of generalized morality are increasingly valuable for predicting cooperation during partner selection, especially in novel contexts. Our studies show that social network size correlates with perceptions of generalized morality in United States and international samples (Study 1) and that East African hunter-gatherers with greater exposure outside their local region perceive morality as more generalized compared to those who have remained in their local region (Study 2). We support the adaptive value of generalized morality in large and unfamiliar social networks with an agent-based model (Study 3), and in experiments where we manipulate partner unfamiliarity (Study 4). Our final study shows that perceptions of morality have become more generalized over the last 200 years of English-language history, which suggests that it may be coevolving with rising social complexity and anonymity in the English-speaking world (Study 5). We discuss the implications of this theory for the cultural evolution of political systems, religion, and taxonomical theories of morality. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

The Role of Implicit and Explicit Beliefs in Grave-Good Practices: Evidence for Intuitive Afterlife Reasoning.

The practice of burying objects with the dead is often claimed as some of the earliest evidence for religion, on the assumption that such "grave goods" were intended for the decedents' use in the afterlife. However, this assumption is largely speculative, as the underlying motivations for grave-good practices across time and place remain little understood. In the present work, we asked if explicit and implicit religious beliefs (particularly those concerning the continuity of personal consciousness after death) motivate contemporary grave-good practices. Across three studies, and comparing participants from the United States and NZ, we measured grave-good deposition at actual or hypothetical funerals, finding that jewelry, photographs, and other items with sentimental, emotional, and relationship value were common. In addition, intuitive afterlife reasoning (as measured by people's attributions of mental states to the dead) motivated grave-good decision-making for about half (Study 2) or more (Study 3) people, including afterlife nonbelievers ("extinctivists"), while those who held explicit (i.e., stated) afterlife beliefs were more likely to participate in the practice. The decision to leave grave goods was also associated with magical contagion beliefs and a need for personal comfort, while other motivations, such as social signaling, were less common. Our results suggest that "afterlife use" is a common motivation for grave-good practices, and that humans possess evolutionarily early intuitions about postdeath consciousness.

Malocclusion severity and smile features: Is there an association?

INTRODUCTION: This observational study investigated the relationship between malocclusion and smiling. METHODS: Adolescents and young adults (n = 72; aged 16-25 years) were identified according to their Dental Aesthetic Index (DAI) and allocated to 3 groups: (1) malocclusion group (n = 24; DAI ≥31), (2) retention group (n = 24; pretreatment DAI ≥31) with a prior malocclusion that had been corrected by orthodontic treatment, (3) control group with no-to-minor malocclusion (n = 24; DAI ≤25). Participants were requested to watch an amusing video. Based on the Facial Action Coding System, automated pattern recognition was used to detect smile episodes and assess their frequency, duration, genuineness, intensity, and extent of tooth show. Demographics, Big Five personality dimensions, and self-perceived smile esthetics-related quality of life were collected from all participants via questionnaires. Data were analyzed by mixed-model analysis and adjusted for possible confounders. RESULTS: Patients from the malocclusion and retention groups smiled significantly less than participants from the control group, with the duration of smiles and smiling time being around half those of control subjects. Smile genuineness, smile intensity, and teeth shown did not differ across groups. Personality traits did not differ significantly among the 3 groups, whereas the malocclusion group scored around 30% less for dental self-confidence than the other 2 groups. CONCLUSIONS: Patients with severe malocclusion tend to smile less, but the features of their smiles are similar to those without malocclusion. A lower propensity to smile in patients with a corrected malocclusion may persist after orthodontic treatment.

Examining a domain-specific link between perceived control and conspiracy beliefs: a brief report in the context of COVID-19.

Although anecdotal evidence suggests that control-threatening situations are associated with an increase in conspiracy beliefs, existing research does not support this "compensatory control" hypothesis. In the current study, we test a more refined hypothesis: that the link between control threat and conspiracy beliefs is domain specific, such that perceived control in a particular domain should lead to conspiracy beliefs pertaining to that domain only. Moreover, given that conspiracy beliefs are stigmatized (i.e., not socially acceptable), we propose that they should be endorsed only when other compensatory systems are frustrated. We test these ideas in the context of the COVID-19 pandemic. Participants from North Macedonia and New Zealand, who differed in perceived government effectiveness, filled in a questionnaire measuring domain-specific and domain-general perceived control, as well as domain-specific and domain-general conspiracy beliefs. As expected, domain specificity of the control threat predicted domain-specific conspiracy beliefs in the Macedonian group only. The results have implication for compensatory control theory, suggesting that the compensatory process may not always be as fluid as believed. Supplementary Information: The online version contains supplementary material available at 10.1007/s12144-021-01977-0.

On the relationship between valence and arousal in samples across the globe.

Affect is involved in many psychological phenomena, but a descriptive structure, long sought, has been elusive. Valence and arousal are fundamental, and a key question-the focus of the present study-is the relationship between them. Valence is sometimes thought to be independent of arousal, but, in some studies (representing too few societies in the world) arousal was found to vary with valence. One common finding is that arousal is lowest at neutral valence and increases with both positive and negative valence: a symmetric V-shaped relationship. In the study reported here of self-reported affect during a remembered moment (N = 8,590), we tested the valence-arousal relationship in 33 societies with 25 different languages. The two most common hypotheses in the literature-independence and a symmetric V-shaped relationship-were not supported. With data of all samples pooled, arousal increased with positive but not negative valence. Valence accounted for between 5% (Finland) and 43% (China Beijing) of the variance in arousal. Although there is evidence for a structural relationship between the two, there is also a large amount of variability in this relation. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Automated detection of smiles as discrete episodes.

BACKGROUND: Patients seeking restorative and orthodontic treatment expect an improvement in their smiles and oral health-related quality of life. Nonetheless, the qualitative and quantitative characteristics of dynamic smiles are yet to be understood. OBJECTIVE: To develop, validate, and introduce open-access software for automated analysis of smiles in terms of their frequency, genuineness, duration, and intensity. MATERIALS AND METHODS: A software script was developed using the Facial Action Coding System (FACS) and artificial intelligence to assess activations of (1) cheek raiser, a marker of smile genuineness; (2) lip corner puller, a marker of smile intensity; and (3) perioral lip muscles, a marker of lips apart. Thirty study participants were asked to view a series of amusing videos. A full-face video was recorded using a webcam. The onset and cessation of smile episodes were identified by two examiners trained with FACS coding. A Receiver Operating Characteristic (ROC) curve was then used to assess detection accuracy and optimise thresholding. The videos of participants were then analysed off-line to automatedly assess the features of smiles. RESULTS: The area under the ROC curve for smile detection was 0.94, with a sensitivity of 82.9% and a specificity of 89.7%. The software correctly identified 90.0% of smile episodes. While watching the amusing videos, study participants smiled 1.6 (±0.8) times per minute. CONCLUSIONS: Features of smiles such as frequency, duration, genuineness, and intensity can be automatedly assessed with an acceptable level of accuracy. The software can be used to investigate the impact of oral conditions and their rehabilitation on smiles.

Longitudinal analysis of sentiment and emotion in news media headlines using automated labelling with Transformer language models.

This work describes a chronological (2000-2019) analysis of sentiment and emotion in 23 million headlines from 47 news media outlets popular in the United States. We use Transformer language models fine-tuned for detection of sentiment (positive, negative) and Ekman's six basic emotions (anger, disgust, fear, joy, sadness, surprise) plus neutral to automatically label the headlines. Results show an increase of sentiment negativity in headlines across written news media since the year 2000. Headlines from right-leaning news media have been, on average, consistently more negative than headlines from left-leaning outlets over the entire studied time period. The chronological analysis of headlines emotionality shows a growing proportion of headlines denoting anger, fear, disgust and sadness and a decrease in the prevalence of emotionally neutral headlines across the studied outlets over the 2000-2019 interval. The prevalence of headlines denoting anger appears to be higher, on average, in right-leaning news outlets than in left-leaning news media.

Adapting a two-stage water load test to measure gastric sensitivity over time.

Van Dyck et al. [8] developed a two-stage protocol to estimate interoceptive (gastric) sensitivity independently of stomach volume. They provided no foreknowledge of the second stage (reaching stomach fullness), following the initial stage (drinking until satiated), therefore preventing longitudinal research. The current study provided foreknowledge. Despite this, within-subject variation over time was found, with increases for satiation (p < 0.050) and% satiation (p < 0.000), and decreases regarding fullness (p < 0.000). Some participants expressed trepidation at baseline, hence foreknowledge may have encouraged avoidance of premature fullness. Future longitudinal studies should consider using one baseline to acclimatise, followed by a true baseline.

A qualitative meta-synthesis of research into patients' past experiences and perceptions of orthodontic treatment outcomes.

BACKGROUND: There is a growing body of evidence emphasizing the importance of research into patient-centred experience in orthodontics. Benefits following orthodontic treatment are mainly related to improved aesthetics and psychosocial outcomes. However, treatment experience from the perspective of orthodontic patients is yet to be fully understood. OBJECTIVE: To understand the past experiences and current perceptions of treatment outcomes of orthodontic patients. STUDY DESIGN: A qualitative meta-ethnography. SELECTION CRITERIA: Qualitative studies and mixed-methods articles with a distinct qualitative component presenting patients' perception of outcomes and overall experiences after an active course of orthodontic treatment were included. SEARCH METHODS: Comprehensive electronic searches were conducted in MEDLINE, Scopus, Web of Science, PsycINFO, and EMBASE up to May 2021, supplemented by grey literature and manual searches. DATA COLLECTION AND ANALYSIS: Two independent reviewers were involved in study selection, data extraction, and quality appraisal. The Critical Appraisal Skills Programme tool for qualitative research was used to assess the quality of included studies. Analysis of data was conducted using meta-ethnographic methods. RESULTS: Out of 801 retrieved search hits, six studies fulfilled the inclusion criteria and were included in the synthesis. The analysis revealed three main themes and associated sub-themes: (1) Reflection on the past treatment experience, (2) Patient satisfaction with treatment outcomes, and (3) Learning to live with retainers. LIMITATIONS: Results express patients' opinions shortly after treatment, and the long-term impact of orthodontic treatment is yet to be understood. CONCLUSIONS: Orthodontic patients mainly viewed their experiences and treatment results positively. Desirable aesthetic outcomes, psychosocial outcomes, and satisfaction with smiles were often reported in the studies reviewed. However, some barriers to optimal experiences were noticed concerning orthodontic retention. REGISTRATION: PROSPERO (CRD42020180121).

Where is emotional feeling felt in the body? An integrative review.

Contemporary research on "embodied emotion" emphasizes the role of the body in emotional feeling. The evidence base on interoception, arguably the most prominent strand of embodied emotion research, places emphasis on the cardiac, respiratory and gastrointestinal systems. In turn, interoception has evidence-based links with improved emotion regulation. Despite the focus on separate bodily systems, it is unclear whether particular interoceptive locations play a greater role in emotional feeling and emotion regulation. Further, according to Gross' "process model", the sooner that regulation of an emotion occurs, the better; hence, it is additionally important to identify the first body areas to activate. These issues are investigated in a two-stage integrative review. The first stage was preliminary, giving an overview of the evidence base to highlight the distribution of measured body areas. This indicated that 86% of publications (n = 88) measured cardiac activity, 26% measured the respiratory system, and six percent the gastrointestinal system. Given the emphasis placed on all three systems in interoception theory and research on emotion, this suggests a dearth of comprehensive findings pertaining to feeling locations. The second stage investigated the core issues of where emotional feelings are felt in the body and time-related implications for regulation. This was based on ten texts, which together suggested that the head, throat and chest are the most consistently detected locations across and within numerous emotional contexts. Caution is required, however, since-among other reasons discussed-measurement was not time-restricted in these latter publications, and direct physiological measurement was found in only a minority of cases.

Public faith in science in the United States through the early months of the COVID-19 pandemic.

OBJECTIVES: Given the centrality of science over the course of the COVID-19 crisis, we evaluate changes in people's beliefs in the power of science in the United States over the first four months of the pandemic. STUDY DESIGN: Post-hoc analysis of cross-sectional survey data. METHODS: A convenience sample of 1327 participants was recruited through Amazon's Mechanical Turk service for three surveys carried out in 14-25 January, 27 March to 1 April, and 28-29 May of 2020. Respondents completed a ten-item instrument measuring different aspects of their perceptions of science including trust, interest, and faith (answer to the question: "How much do you agree with the following statement: Science can sort out any problem."). We conducted multivariate analysis of covariance (MANCOVA) with faith, interest, and trust as dependent variables, time as the independent variable, and political orientation and religiosity as between-subjects covariates. RESULTS: The data revealed that public levels of faith in science increased between January (M â€‹= â€‹3.2) and both March (M â€‹= â€‹3.42) and May (M â€‹= â€‹3.4). By contrast, we observed no changes in interest and trust in science over the same time period. CONCLUSIONS: We speculate that increases in faith in science during the first four months of the pandemic helped people cope with the uncertainty and existential anxiety resulting from this public health crisis.

Does Perceived Lack of Control Lead to Conspiracy Theory Beliefs? Findings from an online MTurk sample.

It is widely believed that conspiracy theory beliefs are the product of perceived lack of control. However, to date there is mixed evidence, at best, to support this claim. We consider the reasons why conspiracy theory beliefs do not appear to be based in any straightforward way on control beliefs, interrogating existing findings and presenting new data that call the relationship into question. Across six studies conducted online using MTurk samples, we observed no effect of control manipulations on conspiracy theory beliefs, while replicating previously reported correlational evidence of their association. The results suggest that conspiracy beliefs are not suitable for compensating for threats to control. We discuss possible reasons for the discrepancy between experimental and correlational effects and examine the limitations of the studies.

Where is an emotion? Using targeted visceroception as a method of improving emotion regulation in healthy participants to inform suicide prevention initiatives: a randomised controlled trial.

BACKGROUND: William James' 1884 paper "What is an emotion?" has generated much recent interest in affective science regarding somatic contributions to emotion. Studies of interoception ("sensing the physiological condition of the body") suggest that sensing specific parts of the body contributes to the production of emotion, namely when sensing the viscera (i.e. "visceroception" of the heart, gut or lungs). Improved visceroception has, for instance, been linked to increased emotional intensity, suggesting a role for interoception in emotion regulation that may pertain specifically to visceral bodily locations. Thus, in addition to asking James' question, "What is an emotion?", we ask, "Where is an emotion?". Further, there is an evidence base pointing to the connections between emotion regulation and suicide, and between interoception and suicide. This is a preliminary trial investigating whether targeted interoception/visceroception improves emotion regulation. Ultimately, the overall project aims to inform suicide prevention efforts. METHODS: The trial utilises a pre-test/post-test control group design, with two experimental groups undergoing visceroceptive interventions (focussing on areas pertaining to the gut or heart) and a control group. The interventions will run for 8 weeks. A spatial cueing task will measure reaction times to bodily changes relating to lower abdomen or chest focus. A stop/signal task will measure emotional inhibition, which is hypothesised to obscure awareness of active bodily locations. Visceroceptive ability will be tracked using a heartbeat estimation task, a water load test, and by self-report questionnaire. The sample will consist of healthcare professionals and healthcare students. Despite these being groups that represent a relatively high suicide risk among professional and student groups, all participants will be healthy, given the preliminary nature of this trial. DISCUSSION: To our knowledge, this will be the first project to address whether emotional feeling presents as a localised bodily phenomenon and whether trained awareness of emotional localisation can improve emotion regulation. It will also be the first to investigate relationships between interoception and emotional inhibition (i.e. whether a sustained interoceptive practice leads to the disinhibition of bodily emotional sensations, which can positively contribute to emotion regulation). These empirical findings on emotion regulation from a healthy sample will be used to inform a desk-based enquiry into the role of embodied emotion in suicide prevention, which may make a significant contribution to a growing evidence base on interoception and suicide. TRIAL REGISTRATION: ACTR N12619000324112 . Registered on 4 March 2019. Universal Trial Number (UTN): U1111-1221-0201.

Traumatic life experiences and religiosity in eight countries.

We present two datasets from a project about the relationship between traumatic life experiences and religiosity. These include data from 1,754 individuals in the United States (n = 322), Brazil (n = 205), China (n = 202), India (n = 205), Indonesia (n = 205), Russia (n = 205), Thailand (n = 205), and Turkey (n = 205). Surveys were consistent across samples: they include measures of traumatic life experiences, negative affective traits, existential security, life satisfaction, death anxiety, and various religious beliefs, attitudes, and behaviours. Psychometric evaluations of measures of supernatural belief and death anxiety were conducted.

Author Correction: Death anxiety, exposure to death, mortuary preferences, and religiosity in five countries.

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

"What Was His Name, Again?": A New Method for Reducing Memory-Based Errors in an Adult False-Belief Task.

Despite considerable interest in the development of Theory of Mind (ToM) during early childhood, until recently, there has been little consideration about whether and how ToM skills continue to change into adulthood. Furthermore, the false-belief task, which is believed to capture the underlying mechanisms of ToM, is rarely used in studies of ToM with adults; those tasks that do assess false-belief understanding may be confounded by incidental task demands, such as complex narratives and excessive memory requirements, making it difficult to isolate adults' true ToM skills, much less to compare them with the skills of children. Here, we adapted a task developed by Valle, Massaro, Castelli, and Marchetti (2015, https://doi.org/10.5964/ejop.v11i1.829) to assess false-belief understanding in adults. Participants were randomly assigned to one of three conditions. In the reading condition, participants read a story about the unexpected transfer of a ball between three brothers. In the video condition, participants watched a video version of the same story. Finally, in the training condition, participants were first trained on the names of the characters, before watching the video. Although condition did not affect participants' ability to correctly answer a standard false belief question ("Where does X think Y thinks the ball is?"), participants in the training condition used more mental state language to justify their responses ("Why does X think Y thinks the ball is here?"), and this improved performance was mediated by improved memory for the story details. We conclude that at least some "failures" of ToM use may be due to an inability to understand, recall, or communicate complex information in a ToM task, raising important questions about how best to measure ToM in adults (and children) in the future.

Older Adults' Emotion Recognition Ability Is Unaffected by Stereotype Threat.

Eliciting negative stereotypes about ageing commonly results in worse performance on many physical, memory, and cognitive tasks in adults aged over 65. The current studies explored the potential effect of this "stereotype threat" phenomenon on older adults' emotion recognition, a cognitive ability that has been demonstrated to decline with age. In Study 1, stereotypes about emotion recognition ability across the lifespan were established. In Study 2, these stereotypes were utilised in a stereotype threat manipulation that framed an emotion recognition task as assessing either cognitive ability (stereotypically believed to worsen with age), social ability (believed to be stable across lifespan), or general abilities (control). Participants then completed an emotion recognition task in which they labelled dynamic expressions of negative and positive emotions. Self-reported threat concerns were also measured. Framing an emotion recognition task as assessing cognitive ability significantly heightened older adults' (but not younger adults') reports of stereotype threat concerns. Despite this, older adults' emotion recognition performance was unaffected. Unlike other cognitive abilities, recognising facially expressed emotions may be unaffected by stereotype threat, possibly because emotion recognition is automatic, making it less susceptible to the cognitive load that stereotype threat produces.

Empathic Accuracy: Worse Recognition by Older Adults and Less Transparency in Older Adult Expressions Compared With Young Adults.

OBJECTIVES: We examined empathic accuracy, comparing young versus older perceivers, and young versus older emoters. Empathic accuracy is related to but distinct from emotion recognition because perceiver judgments of emotion are based, not on what an emoter looks to be feeling, but on what an emoter says s/he is actually feeling. METHOD: Young (≤30 years) and older (≥60 years) adults ("emoters") were unobtrusively videotaped while watching movie clips designed to elicit specific emotional states. The emoter videos were then presented to young and older "perceivers," who were instructed to infer what the emoters were feeling. RESULTS: As predicted, older perceivers' empathic accuracy was less accurate relative to young perceivers. In addition, the emotions of young emoters were considerably easier to read than those of older emoters. There was also some evidence of an own-age advantage in emotion recognition in that older adults had particular difficulty assessing emotion in young faces. DISCUSSION: These findings have important implications for real-world social adjustment, with older adults experiencing a combination of less emotional transparency and worse understanding of emotional experience.