Facial Trustworthiness Research Articles

Racial biases, facial trustworthiness, and resting heart rate variability: unravelling complexities in pain recognition.

The study explores whether racial identity and appearance-based trustworthiness judgments can affect recognition of pain in medical students differing in levels of resting heart rate variability (HRV), a measure of parasympathetic control of the heart. After undergoing HRV assessment, 68 medical students (37 females) participated in a dynamic pain recognition task, viewing video clips of White and Black faces,which differed in perceived trustworthiness based on facial appearance, transitioning from neutral to intense pain expressions. Response time, pain intensity attribution and treatment recommendations were analyzed. Pain was recognized slower and estimated as less intense in Black compared to White faces, leading to a lower likelihood of recommending therapy. Pain recognition was faster for untrustworthy-looking White faces compared to trustworthy ones, while perceived trustworthiness had a minimal impact on the speed of pain recognition in Black faces. However, untrustworthy-looking faces were estimated to express more pain, particularly for Black faces. Notably,thesebiases were more pronounced in individuals with low, rather than high, resting HRV. Considering that therapeutic decisions mirrored pain intensity attribution, it would be important to increase awareness of these biases during medical training in order to promote equity in future pain assessment and treatment.

Negative aftereffects of face trait impressions are modulated by emotional expressions

ABSTRACT Facial trustworthiness impressions critically shape our everyday social interactions. While previous research has predominantly considered trustworthiness impressions to be stable over time, preliminary evidence has shown that they are affected by visual adaptation, such that long exposure to (un)trustworthy-looking faces biases the perception of following faces in the opposite trustworthiness direction. Here, by employing a visual adaptation task across two experiments, we sought further evidence that trustworthiness impressions are shaped by the temporal context. In Experiment 1, we investigated whether visual adaptation affect trustworthiness judgements and found evidence of robust negative face aftereffect. In Experiment 2, we focused our investigation on whether emotional expressions, key cues involved in trait impressions, influence trustworthiness and dominance impressions. We found that adaptation to anti-expressions, which were expected to bias subsequent neutral faces to resemble the original expression (happiness, anger, and fear), significantly modulated subsequent evaluations of trustworthiness and dominance. This result confirms the critical role of emotion perception in trait evaluations. Importantly, using anti-expressions minimised semantic adaptation, thus highlighting the perceptual nature of this aftereffect. Taken together, our findings confirm that temporal context shapes trustworthiness impressions, by showing that visual adaptation affects trust judgements, and that past emotional expressions influence following impressions of trustworthiness and dominance.

Impression management in the boardroom: How CEO facial trustworthiness influences turnover risk

This paper examines the effect of perceived trustworthiness on the turnover of Chief Executive Officers (CEOs) and its moderating role in the relationship between firm performance and CEO turnover. We employ a unique dataset comprising headshots of male CEOs in US-listed firms from 2010 to 2019 and a machine learning-based facial landmark detector to construct a composite facial trustworthiness index. Our results show that CEOs exhibiting high facial trustworthiness experience a lower turnover risk. We also find that facial trustworthiness strongly influences the link between firm performance and CEO turnover. Well-performing executives have a lower risk of being dismissed from their positions, and the dismissal risk is even lower among CEOs perceived as having a high facial trustworthiness. Conversely, underperforming CEOs are more likely to be dismissed, and the dismissal probability is greater among CEOs who have been perceived as being highly trustworthy. Our findings are consistent with the predictions of the expectancy violation theory, which posits that trustworthy-looking executives are more likely to be punished if they do not live up to the expectations held by the board of directors.

Learned trustworthiness and face trustworthiness do not have the same influence on implicit responses to faces measured via fast periodic visual stimulation (FPVS)

Learned trustworthiness and face trustworthiness do not have the same influence on implicit responses to faces measured via fast periodic visual stimulation (FPVS)

Capital Market Consequences of Information about Individual Auditors

Synopsis The research problem This study examines the capital market consequences of the voluntary disclosure of individual auditor information. Specifically, we examined whether and how the disclosure of auditor qualification certificates is associated with information asymmetry and investors’ responses to earnings. Motivation Regulators have recently started to focus on disclosing auditor information beyond their names such as in China, where it is increasingly important in practice. Although prior studies have demonstrated benefits associated with the mandatory disclosure of partners’ names, there is relatively little evidence of the usefulness of additional information about individual auditors that could be provided voluntarily. This study sheds light on the economic consequences of disclosing detailed information about individual auditors and extends the voluntary disclosure literature. The test hypotheses We tested the following hypotheses in this study: (a) voluntary disclosure of auditor qualification certificates is associated with lower information asymmetry and (b) voluntary disclosure of auditor qualification certificates is not associated with investors’ reactions to corporate earnings announcements. Target population Stakeholders of listed companies and audit firms, including company managers, investors, and accounting regulators. Adopted methodology Ordinary least squares regressions, archival data, interviews, and machine learning methods to obtain initial data. Analyses We first crawled the annual audit reports of listed companies in China and used machine learning methods to capture voluntary disclosure of auditor qualification certificates. In a sample of more than 14,000 Chinese company-years from 2012 to 2018, we identified 10.5% of the observations voluntarily disclosing auditor qualification certificates. We used the bid-ask spread as the proxy of information asymmetry, and the earnings response coefficient refers to the coefficient on unexpected earnings to the cumulative abnormal returns. Findings We found that the voluntary disclosure of auditor qualification certificates is associated with lower information asymmetry and stronger market reaction to earnings announcements. The main results hold through various robustness tests. Cross-sectional analyses show that this association is less pronounced when a company employs a larger audit firm or has higher analyst coverage. Further, the specific information conveyed by the auditor qualification certificate, such as the auditor’s facial trustworthiness, helps explain the economic consequences associated with voluntary auditor qualification certificate disclosure. Moreover, an initial disclosure of auditor qualification certificates is associated with greater effects.

Do executive facial trustworthiness have impact on IPO underpricing in the Indonesia stock exchange?

PurposeThis study aims to investigate the impact of facial-based perceived trustworthiness on stock valuation, particularly, in the initial public offering (IPO). IPO settings provide the opportunity to investigate whether information asymmetry resulting from company newness in the market would influence the incorporation of soft information in the form of executive facial trustworthiness in stock valuation.Design/methodology/approachWe use a recent machine learning algorithm to detect facial landmarks and then calculate a composite facial trustworthiness measure using several facial features that have previously been observed in neuroscience and psychological studies to be the most determining factor of perceived trustworthiness. We then regress the facial trustworthiness of IPO firm executives to IPO underpricing.FindingsUtilizing machine learning algorithms, we find that the facial trustworthiness of the company executive negatively impacts the extent of IPO underpricing. This result implies that investors incorporate the facial trustworthiness of company executives into stock valuation. The IPO underpricing also shows that the cost of equity is higher when perceived trustworthiness is low. With regard to the higher information asymmetry in IPO transactions, such a negative impact implies the role of facial trustworthiness in alleviating information asymmetry.Originality/valueThis study provides evidence of the impact of top management personal characteristics on firms’ financial transactions in the Indonesian context. From the perspective of investors and other fund providers, this study shows evidence that heuristics still play an important role in financial decision-making. This is also an indication of investor reliance on soft information. Our research method also provides a new opportunity for the use of machine-learning algorithms in processing non-conventional types of data in finance research, which is still relatively rare in emerging markets like Indonesia. To the best of our knowledge, our study is the first to use personalized measures of trust generated through machine-learning algorithms in IPO settings in Indonesia.

Not to follow because of distrust: perceived trust modulates the gaze cueing effect.

In social life, people spontaneously form stable trustworthiness impressions from faces. However, the precise role of extracting trustworthiness information remains unclear. This study aims to elucidate whether discerning facial trustworthiness influences social interactions. Specifically, it explores the gaze cueing effect (GCE), wherein individuals exhibit quicker responses to targets appearing in the direction of gaze compared to other locations. Given conflicting perspectives in existing literature regarding the potential modulation of trustworthiness on the GCE, two plausible hypotheses are proposed to explain divergent result patterns. The reflexive hypothesis posits that the GCE operates automatically. In contrast, the flexible hypothesis underscores the potential modulatory role of trustworthiness in the GCE. To provide a comprehensive understanding of whether trustworthiness modulates the GCE, we employed face stimuli incorporating trustworthiness information within Posner' s cue-target task. The findings of Experiment 1 revealed that the perception of trustworthiness indeed influenced the GCE. Specifically, when facial stimuli were perceived as trustworthy, they elicited a more pronounced GCE compared to untrustworthy stimuli. This modulation effect was replicated using a different stimulus set in Experiment 2. In Experiment 3, we employed the same stimuli as in Experiment 2, setting the trustworthiness information to baseline as a control experiment. The results demonstrated that the trustworthiness modulation effect disappeared, indicating its specificity to the trustworthiness attribute of the stimuli rather than other characteristics. Collectively, these findings lend support to the flexible hypothesis, highlighting that the extraction of trustworthiness information plays a pivotal role in modulating the GCE, consequently influencing social interactions.

Influence of protective clothing and masks on facial trustworthiness in an investment game: insights from a Chinese population study

Facial features are important sources of information about perceived trustworthiness. Masks and protective clothing diminish the visibility of facial cues by either partially concealing the mouth and nose or covering the entire face. During the pandemic, the use of personal protective equipment affected and redefined who trusts whom in society. This study used the classical investment game of interpersonal trust with Chinese participants to explore the impact of occlusion on interpersonal trust. Faces with moderate initial trustworthiness were occluded by a mask or protective clothing in Experiment 1 and were digitally occluded by a square in Experiment 2, and faces with three levels of initial trustworthiness were occluded by a mask in Experiment 3. Results showed that both undergraduates (Experiment 1a) and non-student adults (Experiment 1b) perceived the faces with protective clothing as more trustworthy than faces wearing standard masks and faces not wearing masks. Faces with the top halves showing were perceived as trustworthy as full faces, while faces with the bottom halves showing were perceived as less trustworthy. The effect of masks is weak and complex. Masks reduced participants’ trust in faces with high initial trustworthiness, had no effect on faces with low and moderate initial trustworthiness, and only slightly increased the trust of undergraduates in faces with moderate initial trustworthiness. Our findings indicate that the lack of information caused by occlusion and the social significance associated with occlusion collectively affect people’s trust behavior in Chinese society. We believe the findings of this study will be useful in elucidating the effects of personal protective equipment usage on perceptions of trustworthiness.

Do Executive Facial Trustworthiness Have Impact on IPO Underpricing?

Do Executive Facial Trustworthiness Have Impact on IPO Underpricing?

Learned trustworthiness does not have the same influence on implicit responses measured via fast periodic visual stimulation as face trustworthiness.

Past research has demonstrated that it is possible to detect implicit responses to face trustworthiness using fast periodic visual stimulation (FPVS). Because people readily retrieve affective associations with faces, the current study investigated whether learned trustworthiness would yield similar responses to face trustworthiness as measured via FPVS. After learning to associate faces with untrustworthy or trustworthy behaviors, participants completed three separate tasks while electroencephalography (EEG) was recorded. In each of these tasks, participants viewed oddball sequences of faces where a single base face was presented repeatedly at a rate of 6 Hz and oddball faces with different identities were presented every fifth face (6 Hz/5 = 1.2 Hz). Providing evidence of learning, the oddball response at 1.2 Hz and its harmonics was stronger for the learned faces compared to novel faces over bilateral occipitotemporal cortex and beyond. In addition, reproducing previous findings with face trustworthiness, we observed a stronger response at 1.2 Hz and its harmonics for sequences with less trustworthy-looking versus trustworthy-looking oddball faces over bilateral occipitotemporal cortex and other sites. However, contrary to our predictions, we did not observe a significant influence of learned trustworthiness on the oddball response. These data indicate that impressions based on learning are treated differently than impressions based on appearance, and they raise questions about the types of design and stimuli that yield responses that are measurable via FPVS.

Atypical neural encoding of faces in individuals with autism spectrum disorder.

Individuals with autism spectrum disorder (ASD) experience pervasive difficulties in processing social information from faces. However, the behavioral and neural mechanisms underlying social trait judgments of faces in ASD remain largely unclear. Here, we comprehensively addressed this question by employing functional neuroimaging and parametrically generated faces that vary in facial trustworthiness and dominance. Behaviorally, participants with ASD exhibited reduced specificity but increased inter-rater variability in social trait judgments. Neurally, participants with ASD showed hypo-activation across broad face-processing areas. Multivariate analysis based on trial-by-trial face responses could discriminate participant groups in the majority of the face-processing areas. Encoding social traits in ASD engaged vastly different face-processing areas compared to controls, and encoding different social traits engaged different brain areas. Interestingly, the idiosyncratic brain areas encoding social traits in ASD were still flexible and context-dependent, similar to neurotypicals. Additionally, participants with ASD also showed an altered encoding of facial saliency features in the eyes and mouth. Together, our results provide a comprehensive understanding of the neural mechanisms underlying social trait judgments in ASD.

Impact of Duchenne and non-Duchenne smiles on perceived trustworthiness of Black and White faces: A Black perspective.

In five experiments, we investigated how Black participants perceive Duchenne and non-Duchenne smiles on Black and White targets. Results consistently demonstrated that when assessing happiness, faces with Duchenne compared to non-Duchenne smiles were rated as happier on both Black and White targets. However, when assessing a more socially evaluative dimension, trustworthiness, perceptions of Black and White targets diverged. Whereas White targets with Duchenne compared to non-Duchenne smiles were rated as more trustworthy, ratings of Black targets with Duchenne and non-Duchenne smiles did not differ, with both appraised as highly trustworthy. Although the degree to which Black participants identified with their race did not moderate these effects, the perceived genuineness of targets did mediate the relationship. One reason why Duchenne compared to non-Duchenne smiles on White but not Black targets were perceived as more trustworthy is because Duchenne compared to non-Duchenne smiles on White but not Black targets were perceived as more genuine. A final study extended these findings by exploring the impact of target race and smile type on partner choice. In accordance with the results related to trustworthiness ratings, Black participants selected White partners with Duchenne compared to non-Duchenne smiles more often but did not differentiate in their choice of Black partners with Duchenne versus non-Duchenne smiles. These findings underscore the importance of investigating not only diverse targets but also diverse perceivers. Our results suggest that Black perceivers use facial cues differently when rating the trustworthiness of Black and White targets and that these perceptions have important downstream consequences. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Business culture impairs facial trustworthiness judgments.

Previous research has found that business culture has a detrimental impact on interpersonal trust. To understand whether this impact extends to rapid, automatic, bottom-up judgments of facial trustworthiness, we conducted 4 experiments involving 244 participants from economic and non-economic backgrounds. We presented participants with both trustworthy and untrustworthy faces and asked them to make judgments on trustworthiness. The results show that individuals who are engaged in studying economics, work in an economics-related occupation, or are exposed to an imagined business culture evaluate trustworthy faces to be less trustworthy. The findings shed light on why and how business culture affects the formation of interpersonal trust.

Revisiting the effect of trustworthy face and attractive appearance on trust and trustworthiness behavior

ABSTRACT In a trust game experiment with Chinese participants, we investigate the effects of trustworthy faces and attractive appearances on trust and trustworthiness behaviour. The participants played the role of trustor and made decisions on how much money to transfer to their paired trustees while looking at the trustees’ photos presented on a large screen. After that, the trustees decided how much money to return to their paired trustors. Results indicate that trust decisions are influenced by both a trustworthy face and an attractive appearance. In addition, a gender effect on trust decisions was found. Men are more trusting than women are, regardless of whether their counterparts are male or female. However, females are less likely to trust their male counterparts than female counterparts. Finally, it is observed that the trustees with a more attractive appearance are more likely to betray the trust they have, while this is not the case for those with more trustworthy faces.

Masks wearing off: Changing effects of face masks on trustworthiness over time.

During the global COVID-19 pandemic, the wearing of face masks became a common practice, raising questions about how masks affect perceptions of and behaviour towards others. Numerous studies have explored the impact of face masks on perceptions of trustworthiness, but results have been mixed and it remains unclear whether masks influence perceptions via their social meaning or their effects on facial appearance. In this study, Australian participants (N = 363) rated a series of faces which were either masked, unmasked, or occluded by a non-mask object (computer) in terms of perceived trustworthiness in 2020, 2022, or 2023. The apparent trustworthiness of unmasked faces remained stable across years, but masked faces were rated significantly more trustworthy in 2020 compared to 2022 and 2023. Furthermore, ratings of masked faces, but not unmasked faces, were correlated with participants' attitudes towards wearing masks. Faces occluded by a non-mask object were perceived to be less trustworthy than masked faces. Together, results strongly suggest the increase in perceived trustworthiness of masked faces reported in numerous studies conducted during COVID-19 were driven by positive social meanings around mask wearing rather than by their effect on facial appearance.

Effects of chronic intranasal oxytocin on visual attention to faces vs. natural scenes in older adults

Aging is associated with changes in face processing, including desensitization to face cues like gaze direction and an attentional preference to faces with positive over negative emotional valence. A parallel line of research has shown that acute administration of oxytocin (OT) increases visual attention to social stimuli such as human faces. The current study examined effects of chronic OT administration among older adults on fixation duration to faces that varied in emotional expression, gaze direction, age, and sex. One hundred and twelve generally healthy older adults (aged 55–95 years) underwent a randomized, placebo-controlled, double-blind, between-subject clinical trial in which they self-administered either OT or placebo (P) intranasally twice a day for 4 weeks. The behavioral task involved rating the trustworthiness of faces (i.e., social stimuli) and natural scenes (i.e., non-social control stimuli) during eye tracking and was conducted before and after the intervention. Fixation duration to both the faces and the natural scenes declined from pre- to post-intervention, however this decline was less pronounced among older adults in the OT compared to the P group for faces but not scenes. Further, face cues (emotional expression, gaze direction, age, sex) did not moderate the treatment effect. This study provides first evidence that chronic intranasal OT maintains salience of social cues over time in older adults, perhaps buffering effects of habituation. These findings enhance understanding of OT effects on social cognition among older adults, and would benefit from follow up with a young adult comparison group to directly speak to specificity of observed effects to older adults and reflection of the aging process.

Racial Prejudice Affects Representations of Facial Trustworthiness

What makes faces seem trustworthy? We investigated how racial prejudice predicts the extent to which perceivers employ racially prototypical cues to infer trustworthiness from faces. We constructed participant-level computational models of trustworthiness and White-to-Black prototypicality from U.S. college students’ judgments of White (Study 1, N = 206) and Black–White morphed (Study 3, N = 386) synthetic faces. Although the average relationships between models differed across stimuli, both studies revealed that as participants’ anti-Black prejudice increased and/or intergroup contact decreased, so too did participants’ tendency to conflate White prototypical features with trustworthiness and Black prototypical features with untrustworthiness. Study 2 (N = 324) and Study 4 (N = 397) corroborated that untrustworthy faces constructed from participants with pro-White preferences appeared more Black prototypical to naive U.S. adults, relative to untrustworthy faces modeled from other participants. This work highlights the important role of racial biases in shaping impressions of facial trustworthiness.

Cross-Cultural Differences in Perception of Facial Trustworthiness Based on Geometric Morphometric Morphs

We report on an experimental study that explores cross-cultural differences in perception of trustworthiness based on facial traits. In the first part of the experiment, individual male and female neutral photographs of Buryats (Mongolian people of Eastern Siberia) were rated on trustworthiness by men and women from the same population. The trustworthy-looking facial traits were investigated by means of geometric morphometrics, and analysis of the facial action units using artificial neural network (FaceReader). Significant associations between facial traits and perceived trustworthiness were revealed only for male photographs rated by men. Facial shape pattern along trustworthy–untrustworthy vector corresponded to the facial femininity-masculinity vector for Buryats, as well as to the positive-negative vector of the emotional connotation of the neutral facial shape. “Untrustworthy” facial shape was characterized by relatively narrower lower jaw, lower set eyebrows, as well as a lower position of the “Brow Lowerer” facial action unit—a frown. In the second part of the experiment, two geometric morphometric morphs, representing “trustworthy” and “untrustworthy” Buryat male facial shapes, were judged on trustworthiness by male representatives of Buryat, Tuvan (Mongolian people of Southern Siberia), Russian, Indian, and East African (Tanzanians) cultures. The results revealed that in all studied samples the “trustworthy” male portrait was rated significantly higher on trustworthiness than “untrustworthy” one. However, perceived trustworthiness, and agreement of portrait judgments with those of Buryats significantly declined with geographic and genetic distance between populations.

When being unattractive is an advantage: effects of face perception on intuitive culpability judgments

This experiment explored the influence of facial attractiveness and trustworthiness on guilty judgments. We recruited 128 participants, randomly assigned to high and low time pressure conditions to act as judges in a simulated blind-date swindle case. Participants judged nine male faces from the Chicago Face Database with three attractiveness levels (unattractive, neutral and attractive), featuring a 2 × 3 mixed factorial design, with consistent standardized average levels of face trustworthiness. We also assessed participants’ self-reported processing styles (rational vs. experiential) using the Rational Experiential Inventory. Notably, participants predominantly judged unattractive faces as innocent, indicating an ugly leniency effect. Our results suggest the primacy of perceived face trustworthiness over attractiveness in guilt judgments for cases where the accused’s physical appearance might facilitate the crime’s success. This highlights the importance of examining the contribution of perceived trustworthiness to guilt judgment biases, and adds to growing evidence exploring extrajudicial factors in criminal verdicts.

Age-group differences in trust-related decision-making and learning

Facial impressions contribute to evaluations of trustworthiness. Older adults are especially vulnerable to trust violations, incurring risks for deception and exploitation. Using the newly developed social Iowa Gambling Task (S-IGT), we examined age-group differences in the impact of facial trustworthiness on decision-making and learning. In the congruent condition (CS-IGT), advantageous decks were paired with trustworthy faces and disadvantageous decks with untrustworthy faces. In the incongruent condition (IS-IGT), this pairing was reversed. Younger (n = 143) and older (n = 129) participants completed either the standard Iowa Gambling Task (IGT), CS-IGT, or IS-IGT. Both age groups preferred trustworthy faces in their initial choices. Older adults performed worse than younger adults across all tasks over time. Further, compared to younger adults, older adults performed worse on the IS-IGT, suggesting that incongruent facial cues interfered with older adults’ performance, which aligns with reduced sensitivity to negative social reputations in aging. Multilevel modeling also indicated that age-group differences were most pronounced across all tasks in the last 40 trials. Together these findings suggest that differences between younger and older adults in experience-dependent decision-making are magnified in social contexts that involve a “wolf in sheep’s clothing,” which may reflect age-related difficulties in integrating incongruent information.