Perceptions of Duchenne and non-Duchenne smiles: A meta-analysis

A meta-analysis was conducted to compare perceptions of Duchenne smiles, smiles that include activation of the cheek raiser muscle that creates crow's feet around the eyes, with perceptions of non-Duchenne smiles, smiles without cheek raiser activation. In addition to testing the overall effect, moderator analyses were conducted to test how methodological, stimulus-specific and perceiver-specific differences between studies predicted the overall effect size. The meta-analysis found that, overall, Duchenne smiles and people producing Duchenne smiles are rated more positively (i.e., authentic, genuine, real, attractive, trustworthy) than non-Duchenne smiles and people producing non-Duchenne smiles. The difference between Duchenne and non-Duchenne smiles was greater when the stimuli were videos rather than photographs, when smiles were elicited naturally rather than through posing paradigms and when Duchenne and non-Duchenne smiles were not matched for intensity of the lip corner puller in addition to other perceiver and methodological moderators.     

Witnessed inclusion improves identification of Duchenne and non-Duchenne smiles

Social exclusion threatens a person's need to belong and prompts them to behave in ways that often facilitate reaffiliation. For adults, direct exclusion increases attention to social information and facial cues, including an enhanced identification of Duchenne and non-Duchenne smiles. Furthermore, inclusion can buffer or mitigate the effects of exclusion. This study investigated children's (N = 44) and adults’ (N = 52) sensitivity to perceptual changes in smiles following witnessed inclusion and exclusion and inclusion's mitigating and buffering effects on perceptual abilities. Contrary to our predictions, participants in our study demonstrated improved accuracy after witnessing inclusion, rather than exclusion, and showed no buffering or mitigating effects of inclusion. This contradiction with previous findings points to a further need to explore the effects of witnessed versus direct inclusion and exclusion, especially if witnessed inclusion and exclusion have the ability to impact perception and shape our behavior.     

What's in a smile?

In positive social contexts, both adults and older infants show more Duchenne smiling (which involves high cheek raising) than non-Duchenne smiling (which does not). This study compared Duchenne and non-Duchenne smiles in early infancy for clues to their emotional significance. Infants (N = 13) from 1 to 6 months of age were videotaped weekly for 5 min in 208 face-to-face interactions with their mothers. Levels of Duchenne and non-Duchenne smiling were correlated within interactive sessions, and the 2 smiles had similar developmental trajectories. Duchenne smiles were typically preceded by non-Duchenne smiles. The results suggest these frequently contrasted types of smiles occur in similar situations and are often different temporal phases of a continuous emotional process. In contrast to adults, infant Duchenne smiles had longer durations than non-Duchenne smiles, suggesting infant smiling does not fit adult models of emotional functioning.     

Duchenne smile,emotional experience,and autonomic reactivity: a test of the facial feedback hypothesis

This study examined the modulatory function of Duchenne and non-Duchenne smiles on subjective and autonomic components of emotion. Participants were asked to hold a pencil in their mouth to either facilitate or inhibit smiles and were not instructed to contract specific muscles. Five conditions--namely lips pressing, low-level non-Duchenne smiling, high-level non-Duchenne smiling, Duchenne smiling, and control--were produced while participants watched videoclips that were evocative of positive or negative affect. Participants who displayed Duchenne smiles reported more positive experience when pleasant scenes and humorous cartoons were presented. Furthermore, they tended to exhibit different patterns of autonomic arousal when viewing positive scenes. These results support thefacial feedback hypothesis and suggest that facial feedback has more powerful effects when facial configurations represent valid analogs of basic emotional expressions.     

Smiling in the face of adversity: the interpersonal and intrapersonal functions of smiling

This study examined hypothesized interpersonal and intrapersonal functions of smiling in positive and negative affective contexts. Smiles were measured during a lab-based monologue task following either happy or sad emotion-evoking films. Psychological adjustment and social integration were measured longitudinally using data obtained in years prior to and after the experimental task. Duchenne (genuine) smiles predicted better long-term adjustment and this effect was mediated independently by both social integration and undoing of negative emotion during the monologue. These effects were observed only in the negative affective context. Non-Duchenne smiles were not related to psychological adjustment. Neither Duchenne nor non-Duchenne smiles during the monologue task were related to personality variables assessed in this study.     

Who likes whom? The interaction between perceiver personality and target look

We investigated determinants of liking at zero-acquaintance, focusing on individual differences in perceivers’ reactions to appearance cues. Perceivers (N = 385) viewed portrait photographs of Targets (N = 146). Perceiver’s Agreeableness and Extraversion were uniquely associated with liking targets. Targets who expressed positive emotions, looked relaxed, were physically attractive, and looked healthy and energetic, were the most liked. There were substantial individual differences in how Perceivers were influenced by appearance cues. For instance, Perceivers generally rated targets who displayed non-Duchenne (fake) smiles less favorably than targets who did not smile or targets who displayed Duchenne (authentic) smiles. However, non-Duchenne smiles elicited especially negative ratings from Perceivers high in Neuroticism or Conscientiousness, but not from Perceivers low in Agreeableness.     

Drawn towards what others seem to like: Implicit preference for objects and people looked at with a duchenne smile

People tend to like objects that are looked at by others, especially if the person looking at the object expresses a positive emotion. But not all positive emotions are equal. We investigated the effect of third party gazing while expressing subtle positive emotions on perceivers’ subsequent preferences and evaluations of objects and people. In two studies participants saw faces looking at target objects and people either with a Duchenne, a non-Duchenne smile, or a neural expression. Participants first indicated gaze direction and later reported intuitive target preference and evaluated the targets. Results show a preference for target stimuli that were smiled at with a Duchenne smile as opposed to when they were looked at with a non-Duchenne smile or a neutral expression. More explicit evaluations of the target stimuli were not affected by the type of facial expression.     

Children's and adolescents' perception of the authenticity of smiles

Recently, Thibault and colleagues described the Duchenne marker as a cultural dialect for the perception of smile authenticity. The current study had the goal to follow up on this finding and to investigate the cues that French Canadian children use to evaluate the authenticity of smiles from members of three ethnic groups. The authenticity of six smiles differing in intensity and presence of orbicularis oculi (Duchenne marker) was rated by 1206 children from 4 to 17 years of age. No differences were found as a function of encoder group. All children perceived medium Duchenne smiles as more authentic than equally intense medium non-Duchenne smiles. Furthermore, results suggest a decrease in the reliance on intensity across the age span. Younger children use the intensity marker along the whole continuum to infer authenticity. In contrast, older children (14- to 17-year-olds) rated all smiles that did not contain the Duchenne marker as roughly equally low in authenticity.     

Automaticity of the interpersonal attitude effect on facial mimicry: It takes effort to smile at neutral others but not those we like

People often mimic others more if the other is liked, a member of an ingroup, or in a cooperative relationship with the observer; we call this the interpersonal attitude effect. This study examines the degree to which this attitude effect on mimicry is an automatic or an effortful process. While under cognitive load or no load, participants observed positive, negative, and neutral others making emotional expressions. Electromyography measured corrugator supercilii (knits brow) and zygomaticus major (raises corners of mouth) activity. Under load, participants mimicked smiles of positive individuals but not neutral or negative individuals. During no-load trials, participants did not mimic negative individuals, but did mimic smiles of neutral and positive individuals. Participants enhanced their smiles in response to the smiles of liked others without effort, but smiling at neutral others’ smiles required greater cognitive resources.     

The preference to work for a man or a woman: A matter of sex and gender?

A survey of 455 individuals sampled from two populations that varied in age, educational level, and work experience posed a question asked in Gallup polls over six decades: “If you were taking a new job and had your choice of a boss, would you prefer to work for a man or a woman?” Respondents could state that they would prefer a male boss, prefer a female boss, or had no preference. As expected from theory and Gallup results, respondents who had a preference preferred to work for a man more than a woman, although a majority expressed “no preference.” When they expressed a preference, women preferred to work for a female boss over a male boss more than men did, whereas men preferred to work for a male boss over a female boss more than women did. Sex-typed (i.e., masculine or feminine) respondents in gender identity exhibited a greater preference to work for a boss of a particular sex over having no preference than non-sex-typed respondents. Further, feminine respondents preferred to work for a female boss over a male boss more than masculine respondents did, whereas masculine respondents preferred to work for a male boss over a female boss more than feminine respondents did. Overall, these results suggest that the preference to work for a man or a woman is a matter of both sex and gender. Implications for job applicants' vocational decisions and how female leaders fare in the workplace are discussed.     

Mere acceptance produces apparent attitude in the Implicit Association Test

Two experiments examined mere acceptance effects in the Implicit Association Test (IAT). They tested whether accepting a stimulus as conforming to a rule produces responding consistent with positive attitude in the IAT. In Experiment 1, accepted stimuli were more easily categorized with pleasant personality characteristics than rejected stimuli; they were preferred according to the logic of the IAT. Accepted word stimuli were also responded to faster overall, suggesting that it was easier to make the accept than the reject response. In Experiment 2, numerical stimuli that conformed to a rule showed the same IAT preference effect over non-confirming stimuli, even when the rule conforming stimuli were more difficult to categorize. Three sources of this apparent preference for rule-conforming stimuli are considered: (1) the semantic relatedness of the concepts “accept” and “pleasant” on the one hand, and “reject” and “unpleasant” on the other; (2) that rejected non-category members are more salient (‘pop-out’) and thus are more easily categorized with the more salient unpleasant personality characteristics; or (3) that accepting rule-conforming stimuli is experienced as a pleasant event. Regardless of the mechanism underlying the mere acceptance effect, the IAT can produce apparent preferences for stimuli towards which participants have no positive attitude.     

Dynamic valuation: Preference changes in the context of face-to-face negotiation

This experiment examines the dynamics of preference change in the context of face-to-face negotiation. Participants playing the role of “student” or “financial aid officer” exchanged proposals regarding the terms of a student loan. Consistent with dissonance theory, participants increased their liking for proposals they offered and/or ultimately accepted. The reactance theory prediction that participants would devalue proposals received from their opponents was confirmed for loan officers, but not for students. A pair of experimental manipulations involving the pre-rating of proposals and/or the opportunity for participants to engage in a brief discussion period prior to the initial exchange of offers mediated these effects, and influenced subsequent rates of agreement. Underlying attributional mechanisms and the implications of these findings for facilitating agreements are discussed.     

Hostility and facial expression in young men and women: is social regulation more important than negative affect?

Behavioral differences may clarify the link between hostility and health. This study examined facial expression. Seventy-two low- and high-hostile undergraduates underwent the Type A Structured Interview (SI) and a test of social anxiety. Facial behavior was measured with the Facial Action Coding System. Low-hostile participants displayed non-Duchenne smiles more frequently than high-hostile participants during the SI. There were no group differences in the expression of disgust. The results identify differences in the nonverbal behavior of hostile people. Restricted use of non-Duchenne smiles may reflect limited use of appeasement, contributing to uncomfortable interpersonal relations and limited social support. The findings are consistent with a behavioral ecology perspective and suggest that social regulation may be as important as negative affect in determining the consequences of hostility.     

“How many bad apples does it take to spoil the whole barrel?”: Social exclusion and toleration for bad apples

In social dilemmas, where personal welfare is in conflict with collective welfare, there are inherent incentives to act non-cooperatively. Moreover, there is evidence that the example of a few uncooperative group members (“bad apples”) is more influential than the example of comparable numbers of cooperative members (a bad apple effect). Two studies are reported that examine the functional relationship between the number of likely bad apples and individual cooperation, and whether and when the threat of social exclusion for uncooperative behavior may effectively counter the temptation to follow the example of such “bad apples”. It is shown that (a) the threat of exclusion is sufficient to counter the temptation to follow a few bad apples’ example, (b) such threats cannot, however, overcome the cooperation-degrading effects of large numbers (e.g., a majority) of bad apples, and (c) the effectiveness of such threats may be greater in relatively smaller groups.     

Trait reappraisal is associated with resilience to acute psychological stress

Life is full of stressful events. However, while some individuals are negatively affected by stress, others are more resilient to its effects. The factors that contribute to variability in stress resilience are not fully understood. Here, we tested the hypothesis that trait reappraisal would be associated with greater stress resilience to a first-time tandem skydive. Specifically, we expected measures of “anxiety” to be lower and measures of “euphoria” to be higher in high trait reappraising individuals. Our findings that trait reappraisal is negatively correlated with stress reactivity as measured by cortisol, heart rate, and self-report state anxiety, but positively correlated with self-report state euphoria suggest that individuals high in trait reappraisal are more stress resilient.     

Negational racial identity and presidential voting preferences

Previous research suggests that narrow identification with one’s own racial group impedes coalition building among minorities. Consistent with this research, the 2008 Democratic primary was marked by racial differences in voting preferences: Black voters overwhelmingly preferred Barack Obama, a Black candidate, and Latinos and Asians largely favored Hillary Clinton, a White candidate. We investigated one approach to overcoming this divide: highlighting one’s negational identity. In two experiments simulating primary polling procedures, Asians and Latinos randomly assigned to think of and categorize themselves in negational terms (i.e., being non-White) were more likely to vote for Obama than participants focused on their affirmational identity (i.e, being Asian or Latino), who showed the typical preference for Clinton. This shift in voting preference was partially mediated by warmer attitudes towards other minority groups. These results suggest that negational identity is a meaningful source of social identity and demonstrate that whether one thinks about “who one is” versus “who one is not” has far-reaching impact for real-world decisions.     

The paradox of moral focus

When we evaluate moral agents, we consider many factors, including whether the agent acted freely, or under duress or coercion. In turn, moral evaluations have been shown to influence our (non-moral) evaluations of these same factors. For example, when we judge an agent to have acted immorally, we are subsequently more likely to judge the agent to have acted freely, not under force. Here, we investigate the cognitive signatures of this effect in interpersonal situations, in which one agent (“forcer”) forces another agent (“forcee”) to act either immorally or morally. The structure of this relationship allowed us to ask questions about both the “forcer” and the “forcee.” Paradoxically, participants judged that the “forcer” forced the “forcee” to act immorally (i.e. X forced Y), but that the “forcee” was not forced to act immorally (i.e. Y was not forced by X). This pattern obtained only for human agents who acted intentionally. Directly changing participants’ focus from one agent to another (forcer versus forcee) also changed the target of moral evaluation and therefore force attributions. The full pattern of judgments may provide a window into motivated moral reasoning and focusing bias more generally; participants may have been motivated to attribute greater force to the immoral forcer and greater freedom to the immoral forcee.     

The object of my protection: Shielding fundamental motives from the implicit motivational influence of others

Goal shielding theory suggests that one's focal pursuits automatically inhibit the activation of interfering goals (Shah, Friedman, & Kruglanski, 2002); however, it is not entirely clear how individuals come to identify what constitutes “interfering”. Three studies examine how this identification process may be guided by fundamental social motives that individuals possess, particularly in social situations wherein goals are primed through mere exposure to others' goal-directed behavior (“goal contagion”, Aarts, Gollwitzer, & Hassin, 2004). Participants' fundamental motives for positive self-regard (Study 1), autonomy (Study 2), and distinctiveness (Study 3) were either manipulated or measured and participants read scenarios that manipulated the goal-directed behavior of a target other. Results indicated that participants inhibited the activation of goals being primed by others when the implicit influence interfered with their fundamental motives in some way. These findings suggest that fundamental motives can guide whether individuals will catch goals from others or shield themselves from such influences.     

The perceptual push: The interplay of implicit cues and explicit situational construals on behavioral intentions in the Prisoner’s Dilemma

Although it is clear that nonconscious primes can affect behavioral decisions, the extent to which the prime-to-behavior link is mediated by intervening interpretative processes is still unknown. The present research examined the mediational role of “situational construals” by assessing the effects of cooperative versus competitive primes on participants’ construals of, and responses to, the prisoner’s dilemma. As predicted, this priming manipulation influenced participants’ construals of the game (assessed by the participants’ ratings of the appropriateness of different “names for the game” and their estimates of how random others would play), and their own expressed willingness to cooperate versus defect. Most crucially, a mediational analysis and a manipulation of the order in which these dependent variables were measured established that the prime-to-behavior link can be strengthened by an intervening task calling for explicit construal of the situation. The interplay of situational construal and implicit primes in producing deliberative behavior is discussed.     

Responding to negativity: How a risky tactic can serve a vigilant strategy

Regulatory focus theory distinguishes between two motivational systems—a promotion system concerned with nurturance and advancement and a prevention system concerned with security and safety [Higgins, E. T. (1997). Beyond pleasure and pain. American Psychologist, 52, 1280-1300]. In signal detection terms, a preference for eager strategies within the promotion system has been equated with a “risky” bias, whereas a preference for vigilant strategies within the prevention system has been equated with a “conservative” bias. However, we propose that when prevention-focused individuals face negative input, they should be willing to incur false alarms to ensure that negative stimuli are correctly identified. Across six studies, we found for negative stimuli a reversal of the traditional finding that prevention participants show a conservative bias in information processing. In these studies, prevention participants consistently exhibited a risky bias when the input was negative. We suggest that this new tactic—a risky bias in response to negativity—best serves the prevention strategy of vigilance.