Social perception of robots is shaped by beliefs about their minds.

Roboticists often imbue robots with human-like physical features to increase the likelihood that they are afforded benefits known to be associated with anthropomorphism. Similarly, deepfakes often employ computer-generated human faces to attempt to create convincing simulacra of actual humans. In the present work, we investigate whether perceivers' higher-order beliefs about faces (i.e., whether they represent actual people or android robots) modulate the extent to which perceivers deploy face-typical processing for social stimuli. Past work has shown that perceivers' recognition performance is more impacted by the inversion of faces than objects, thus highlighting that faces are processed holistically (i.e., as Gestalt), whereas objects engage feature-based processing. Here, we use an inversion task to examine whether face-typical processing is attenuated when actual human faces are labeled as non-human (i.e., android robot). This allows us to employ a task shown to be differentially sensitive to social (i.e., faces) and non-social (i.e., objects) stimuli while also randomly assigning face stimuli to seem real or fake. The results show smaller inversion effects when face stimuli were believed to represent android robots compared to when they were believed to represent humans. This suggests that robots strongly resembling humans may still fail to be perceived as "social" due pre-existing beliefs about their mechanistic nature. Theoretical and practical implications of this research are discussed.

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.

Comparing data quality from an online and in-person lab sample on dynamic theory of mind tasks.

Nearly half the published research in psychology is conducted with online samples, but the preponderance of these studies rely primarily on self-report measures. The current study validated data quality from an online sample on a novel, dynamic task by comparing performance between an in-lab and online sample on two dynamic measures of theory of mind-the ability to infer others' mental states. Theory of mind is a cognitively complex construct that has been widely studied across multiple domains of psychology. One task was based on the show The Office®, and has been previously validated by the authors with in-lab samples. The second was a novel task based on the show Nathan for You®, which was selected to account for familiarity effects associated with The Office. Both tasks measured various dimensions of theory of mind (inferring beliefs, understanding motivations, detecting deception, identifying faux pas, and understanding emotions). The in-person lab samples (N = 144 and 177, respectively) completed the tasks between-subject, whereas the online sample (N = 347 from Prolific Academic) completed them within-subject, with order counterbalanced. The online sample's performance across both tasks was reliable (Cronbach's α = .66). For The Office, the in-person sample outperformed the online sample on some types of theory of mind, but this was driven by their greater familiarity with the show. Indeed, for the relatively unfamiliar show Nathan for You, performance did not differ between the two samples. Together, these results suggest that crowdsourcing platforms elicit reliable performance on novel, dynamic, complex tasks.

Denver pain authenticity stimulus set (D-PASS).

We introduce the Denver Pain Authenticity Stimulus Set (D-PASS), a free resource containing 315 videos of 105 unique individuals expressing authentic and posed pain. All expressers were recorded displaying one authentic (105; pain was elicited via a pressure algometer) and two posed (210) expressions of pain (one posed expression recorded before [posed-unrehearsed] and one recorded after [posed-rehearsed] the authentic pain expression). In addition to authentic and posed pain videos, the database includes an accompanying codebook including metrics assessed at the expresser and video levels (e.g., Facial Action Coding System metrics for each video controlling for neutral images of the expresser), expressers' pain threshold and pain tolerance values, averaged pain detection performance by naïve perceivers who viewed the videos (e.g., accuracy, response bias), neutral images of each expresser, and face characteristic rating data for neutral images of each expresser (e.g., attractiveness, trustworthiness). The stimuli and accompanying codebook can be accessed for academic research purposes from https://digitalcommons.du.edu/lsdl_dpass/1/ . The relatively large number of stimuli allow for consideration of expresser-level variability in analyses and enable more advanced statistical approaches (e.g., signal detection analyses). Furthermore, the large number of Black (n = 41) and White (n = 56) expressers permits investigations into the role of race in pain expression, perception, and authenticity detection. Finally, the accompanying codebook may provide pilot data for novel investigations in the intergroup or pain sciences.

Race-based biases in psychological distress and treatment judgments.

Racism creates and sustains mental health disparities between Black and White Americans and the COVID-19 pandemic and ongoing harassment directed at Black Americans has exacerbated these inequities. Yet, as the mental health needs of Black Americans rise, there is reason to believe the public paradoxically believes that psychopathology hurts Black individuals less than White individuals and these biased distress judgments affect beliefs about treatment needs. Four studies (two pre-registered) with participants from the American public and the field of mental health support this hypothesis. When presented with identical mental illnesses (e.g., depression, anxiety, schizophrenia), both laypeople and clinicians believed that psychopathology would be less distressing to Black relative to White individuals. These distress biases mediate downstream treatment judgments. Across numerous contexts, racially-biased judgments of psychological distress may negatively affect mental healthcare and social support for Black Americans.

A Race-Based Size Bias for Black Adolescent Boys: Size, Innocence, and Threat.

We adopted an intersectional stereotyping lens to investigate whether race-based size bias-the tendency to judge Black men as larger than White men-extends to adolescents. Participants judged Black boys as taller than White boys, despite no real size differences (Studies 1A and 1B), and even when boys were matched in age (Study 1B). The size bias persisted when participants viewed computer-generated faces that varied only in apparent race (Study 2A) and extended to perceptions of physical strength, with Black boys judged as stronger than White boys (Study 2B). The size bias was associated with threat-related perceptions, including beliefs that Black boys were less innocent than White boys (Study 3). Finally, the size bias was moderated by a valid threat signal (i.e., anger expressions, Studies 4A and 4B). Thus, adult-like threat stereotypes are perpetrated upon Black boys, leading them to be erroneously perceived as more physically formidable than White boys.

Waist-to-Hip Ratio Predicts Sexual Perception and Responses to Sexual Assault Disclosures.

The current work investigates the effects of target of perception's waist-to-hip ratio (WHR) on perceivers' judgments of sexual unrestrictedness and sexual victimization prototypicality. Studies 1a and 1b found that women with lower WHRs were perceived as relatively more sexually unrestricted. Studies 2a and 2b found that women with lower WHRs were perceived as relatively more prototypic of sexual victimization. Study 3 built on these findings to consider implications for responses to sexual assault disclosures. Perceivers disbelieved and minimized a disclosure of assault relatively more when made by a woman with a higher WHR. In sum, this body of work implicates WHR as a body cue that can inform consequential sexual perception. Thereby, this work identifies factors that could influence judgments of credibility of sexual violence reports, which may have implications for hesitancy to report sexual violence.

In the Face of Opportunities: Facial Structures of Scientists Shape Expectations of STEM Environments.

Impressions of role leaders provide information about anticipated opportunities in a role, and these perceptions can influence attitudes about science, technology, engineering, and mathematics (STEM) pathways. Specifically, the facial structures of role leaders influenced perceived affordances of working with that person, such as the availability of communal and agentic opportunities (e.g., mentorship; achievement). STEM faculty with trustworthy (relative to dominant) faces were seen as valuing communal goals (Studies 1-3), and in turn, perceived as affording both communal and agentic opportunities in their research groups (Studies 2-3b). These heightened goal opportunities aligned with perceptions that trustworthy-faced advisors would enact more group-supportive behaviors (Study 2). Consequently, students anticipated fairer treatment and reported greater interest in labs directed by trustworthy- than dominant-faced leaders (Studies 3a-4a), even when images were accompanied by explicit information about leaders' collaborative behavior (Study 4b). The faces of leaders can thus function as the "face" of that role and the surrounding culture.

Perceiving People With Physical Disabilities as Overcoming Adversity Warps Mind Perception.

Across six studies, we tested how people with physical disabilities were ascribed mental faculties. People with physical disabilities were seen as more capable of mental agency (e.g., thinking), but not more capable of experience (e.g., pain), compared to nondisabled people (Study 1). People with physical disabilities were also seen as more capable of supernatural mental agency (e.g., seeing the future, reading minds; Study 2). Believing that people with physical disabilities were more mentally agentic than nondisabled people was unrelated to Beliefs in a Just World (Study 3) but was related to beliefs about hardship (Study 4). Narratives of overcoming adversity, common in portrayals of the disabled community, increased the perceived mental sophistication of people with physical disabilities (Study 5). Finally, hardship narratives also affected helping behavior toward people with physical disabilities (Study 6). Thus, hardship stories surrounding individuals with disabilities may contribute to beliefs that they have particularly sophisticated minds.

Determining Whether Older Adults Use Similar Strategies to Young Adults in Theory of Mind Tasks.

OBJECTIVES: Theory of mind-the ability to infer others' mental states-declines over the life span, potentially due to cognitive decline. However, it is unclear whether deficits emerge because older adults use the same strategies as young adults, albeit less effectively, or use different or no strategies. The current study compared the similarity of older adults' theory of mind errors to young adults' and a random model. METHODS: One hundred twenty older adults (MAge = 74.68 years; 64 female) and 111 young adults (MAge = 19.1; 61 female) completed a novel theory of mind task (clips from an episode of the sitcom The Office®), and a standard measure of cognitive function (Logical Memory II). Monte Carlo resampling estimated the likelihood that older adults' error patterns were more similar to young adults' or a random distribution. RESULTS: Age deficits emerged on the theory of mind task. Poorer performance was associated with less similarity to young adults' response patterns. Overall, older adults' response patterns were ~2.7 million times more likely to match young adults' than a random model. Critically, one fourth of older adults' errors were more similar to the random distribution. Poorer memory ability contributed to this relationship. DISCUSSION: Age deficits in theory of mind performance may be driven by a subset of older adults and be related to disparities in strategy use. A certain amount of cognitive ability may be necessary for older adults to engage similar strategies to young adults' during theory of mind.

Having the right face for the job: The effect of facial width-to-height ratio on job selection preferences.

Prior research has found that various job candidate characteristics can influence hiring decisions. The current work used experimental methods to test how a novel, appearance-based cue known as a facial width-to-height ratio (fWHR) can bias hiring preferences. A first study provides evidence for our initial hypothesis: people believed high fWHR candidates would be a better fit for blue-collar jobs compared with low fWHR candidates, who were in turn favoured for white-collar jobs. A second study replicates this initial finding and extends it by demonstrating that the effect of fWHR-derived trait inferences of strength and intelligence on hireability predictably varies by job type. Finally, in a third study, we find that this bias reverses when traditional stereotypes of blue-collar and white-collar jobs requiring physicality and intellect are subverted, finding that perceptions of the fit between face type and presumed job requirements matter most for hiring preferences. Together, these findings demonstrate how a seemingly subtle appearance-based cue can have robust implications for hiring.

Social Cognitive Abilities Predict Unique Aspects of Older Adults' Personal Social Networks.

OBJECTIVES: The current study explores whether personal social network characteristics are associated with older adults' memory and/or social cognitive function (e.g., ability to infer other's mental states-theory of mind). METHOD: 120 older adults completed a social network interview, a memory measure, and 2 core measures of social cognitive functions: emotion recognition and theory of mind. RESULTS: Variation in memory and social cognitive abilities predicted distinct aspects of older adults' social networks. Having better memory predicted having larger, less-dense social networks, but better theory of mind was associated with having at least one acquaintance in the network, and having more heterogeneous social relationships within the network. DISCUSSION: Together our findings suggest that disparate social cognitive abilities may serve unique functions, facilitating maintenance of beneficial social connections.

Motives matter: White instructors' external race-based motives undermine trust and belonging for Black college students.

OBJECTIVE: Trust is fundamental to successful educational relationships. Yet, numerous barriers inhibit the development of trust between students of color (SOC) and White instructors. The current research examined a metacognitive obstacle to the development of cross-race classroom trust: Primarily External Race Motives (PERM). PERM was defined as the experience that instructors were more concerned with avoiding the appearance of prejudice than having self-directed egalitarian motives. METHOD: Using within-subjects vignettes (n = 313; 74.8% female), between-subjects cross-sectional designs (n = 386; 70.5% female), and longitudinal methods (n = 135; 45.2% female), the current work tested the primary hypothesis that PERM would undermine instructor trust and classroom belonging. Hypotheses were tested with Black adults (Study 1) and college students (Studies 2 and 3). RESULTS AND CONCLUSIONS: Whether with hypothetical, past, or present White educators, feeling that instructors have primarily external race-based motives undermined instructor trust and classroom belonging. In all studies, the relationship between PERM and classroom belonging was mediated by instructor (mis)trust. The results provide evidence that motives viewed to be primarily external undermine instructional relationships for SOC. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

People attribute humanness to men and women differently based on their facial appearance.

Recognizing others' humanity is fundamental to how people think about and treat each other. People often ascribe greater humanness to groups that they socially value, but do they also systematically ascribe social value to different individuals? Here, we tested whether people (de)humanize individuals based on social traits inferred from their facial appearance, focusing on attractiveness and intelligence. Across five studies, less attractive and less intelligent-looking individuals seemed less human, but this varied by target gender: Attractiveness better predicted humanness attributions to women whereas perceived intelligence better predicted humanness attributions to men (Study 1). This difference seems to stem from gender stereotypes (preregistered Studies 2 and 3) and even extends to attributions of children's humanness (preregistered Study 4). Moreover, this gender difference leads to biases in moral treatment that confer more value to the lives of attractive women and intelligent-looking men (preregistered Study 5). These data help to explain how interpersonal judgments of individuals interact with intergroup biases to promote gender-based discrimination, providing greater nuance to the mechanisms and outcomes of dehumanization. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Decoding complex emotions and humanization show related face processing effects.

Inferring others' complex emotions is central to ascribing humanness to others. However, little past research has investigated the perceptual processes linking the inference of complex emotions to judging others' humanness. To this end, we disrupted the low-level perceptual processes typically employed in face processing via face inversion. Of interest was whether the inversion-driven deficits in complex emotion judgments and in humanness judgments were related. In three experiments, we find that disrupting efficient face processing via face inversion undermined the accurate decoding of complex emotions from the eyes (Experiments 1a, 1b, and 2) and triggered more dehumanized evaluations of target eye regions (Experiments 1a and 1b) and faces (Experiment 2). Critically, these inversion effects on emotion decoding and dehumanization were positively correlated. People who demonstrated stronger inversion effects on the accuracy of decoding complex emotions also demonstrated stronger inversion effects on dehumanizing evaluations. Taken together, these findings provide novel evidence that sensitivity to complex emotions and (de)humanization are related through a shared perceptual basis in efficient face processing. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Bodies and Minds: Heavier Weight Targets Are De-Mentalized as Lacking in Mental Agency.

Five experiments investigate the hypothesis that heavier weight individuals are denied mental agency (i.e., higher order cognitive and intentional capacities), but not experience (e.g., emotional and sensory capacities), relative to average weight individuals. Across studies, we find that as targets increase in weight, they are denied mental agency; however, target weight has no reliable influence on ascriptions of experience (Studies 1a-2b). Furthermore, the de-mentalization of heavier weight targets was associated with both disgust and beliefs about targets' physical agency (Study 3). Finally, de-mentalization affected role assignments. Heavier weight targets were rated as helpful for roles requiring experiential but not mentally agentic faculties (Study 4). Heavier weight targets were also less likely than chance to be categorized into a career when it was described as requiring mental agency (versus experience; Study 5). These findings suggest novel insights into past work on weight stigma, wherein discrimination often occurs in domains requiring mental agency.

Robots engage face-processing less strongly than humans.

Robot faces often differ from human faces in terms of their facial features (e.g., lack of eyebrows) and spatial relationships between these features (e.g., disproportionately large eyes), which can influence the degree to which social brain [i.e., Fusiform Face Area (FFA), Superior Temporal Sulcus (STS); Haxby et al., 2000] areas process them as social individuals that can be discriminated from other agents in terms of their perceptual features and person attributes. Of interest in this work is whether robot stimuli are processed in a less social manner than human stimuli. If true, this could undermine human-robot interactions (HRIs) because human partners could potentially fail to perceive robots as individual agents with unique features and capabilities-a phenomenon known as outgroup homogeneity-potentially leading to miscalibration of trust and errors in allocation of task responsibilities. In this experiment, we use the face inversion paradigm (as a proxy for neural activation in social brain areas) to examine whether face processing differs between human and robot face stimuli: if robot faces are perceived as less face-like than human-faces, the difference in recognition performance for faces presented upright compared to upside down (i.e., inversion effect) should be less pronounced for robot faces than human faces. The results demonstrate a reduced face inversion effect with robot vs. human faces, supporting the hypothesis that robot faces are processed in a less face-like manner. This suggests that roboticists should attend carefully to the design of robot faces and evaluate them based on their ability to engage face-typical processes. Specific design recommendations on how to accomplish this goal are provided in the discussion.

Impact of perceived interpersonal similarity on attention to the eyes of same-race and other-race faces.

One reason for the persistence of racial discrimination may be anticipated dissimilarity with racial outgroup members that prevent meaningful interactions. In the present research, we investigated whether perceived similarity would impact the processing of same-race and other-race faces. Specifically, in two experiments, we varied the extent to which White participants were ostensibly similar to targets via bogus feedback on a personality test. With an eye tracker, we measured the effect of this manipulation on attention to the eyes, a critical region for person perception and face memory. In Experiment 1, we monitored the impact of perceived interpersonal similarity on White participants' attention to the eyes of same-race White targets. In Experiment 2, we replicated this procedure, but White participants were presented with either same-race White targets or other-race Black targets in a between-subjects design. The pattern of results in both experiments indicated a positive linear effect of similarity-greater perceived similarity between participants and targets predicted more attention to the eyes of White and Black faces. The implications of these findings related to top-down effects of perceived similarity for our understanding of basic processes in face perception, as well as intergroup relations, are discussed.

Spatial frequency and valence interact in complex emotion perception.

Research on spatial frequency contributions to facial emotion identification has largely focused on basic emotions. The present experiment characterised spatial frequency contributions to decoding complex emotions, which can be less visible and intense than basic emotions. We investigated the effects of spatial frequency, expression valence and perceptually available features (full face or eyes only) on decoding accuracy. We observed main effects of all factors, with better performance for high (relative to low) spatial frequency, for positive (relative to negative) emotions and for full face (relative to eyes only) conditions. We also observed an interaction of all factors. The high spatial frequency advantage in decoding accuracy was eliminated only for full faces expressing more positive complex emotions. These findings suggest advantages from high spatial frequency content in accurately decoding complex emotions may attenuate when positive complex emotions are decoded from the spatial frequency content of a broader constellation of features.

Dehumanizing Prisoners: Remaining Sentence Duration Predicts the Ascription of Mind to Prisoners.

We tested the novel hypothesis that the dehumanization of prisoners varies as a function of how soon they will be released from prison. Seven studies indicate that people ascribe soon-to-be-released prisoners greater mental sophistication than those with more time to serve, all other things being equal. Studies 3 to 6 indicate that these effects are mediated by perceptions that imprisonment has served the functions of rehabilitation, retribution, and future deterrence. Finally, Study 7 demonstrates that beliefs about rehabilitation and deterrence may be the most important in accounting for these effects. These findings indicate that the amount of time left on a prison sentence influences mind ascription to the incarcerated, an effect that has implications for our understanding of prisoner dehumanization.