Perceptual Bias Research Articles

I am, therefore I preserve: Exploring middle-class imagery, biased status perceptions, and pro-environmental behaviour

Extensive research on pro-environmental behaviour (PEB) reveals a significant knowledge gap in understanding the influence of social class, perceived status and the middling tendency on pro-environmental behaviour. Using the International Social Survey Programme Environment dataset, and conducting multilevel mixed-effects linear regressions, we find that the middling tendency and biased status perceptions significantly influences pro-environmental behaviour. Those who deflate their social position have higher pro-environmental behavior and this reinforces the idea that pro-environmental behaviour is driven by a post-materialist effect rather than a status enhancement effect. Moreover, the objective middle class is still a stronger contributor to higher PEB levels compared to subjective middle class. We also find the relation between class, status and PEB vary by country. These findings provide vital insights into the intricate and heterogenous dynamics between class, status and pro-environmental behaviour among different countries and shed light on class and status as driving forces behind pro-environmental behaviour.

Do professors favor liberal students? Examining political orientation appearance cues and professor bias

The perception of political bias in higher education persists even in the face of scarce evidence that liberal professors penalize conservative students or favor liberal ones. We investigated the degree to which college professors used student appearance to ascertain political orientation, and whether liberal-looking students were rated more favorably. Ninety-eight (98) professors rated a student on logic, likeability, and political leaning. The hypothetical student’s dress (bohemian vs. business casual) and hairstyle (brown hair vs. pink hair) were manipulated to cue political orientation. Results indicated that professors used student appearance to ascertain liberal political leaning but did not rate the students significantly different on logic and likeability. These results suggest that while professors use appearance cues, they do not favor students who appear liberal leaning or punish those who look less liberal.

Perception of pointing gestures in 3D space

AbstractPointing gestures are often used to refer to distant referents by indicating in which vertical and horizontal direction the referent is located relative to the pointer. In the present manuscript, we address whether and how both dimensions interact when people spatially interpret pointing gestures, or whether both dimensions are processed independently as reflected in many current models. We found that both dimensions interact on different levels. First, cross-dimensional effects were found on a between-gestures level. That is, the perception of the vertical position implied by a pointing gesture depended on horizontal arm and finger orientation. Conversely, the horizontal interpretation depended on vertical arm and finger orientation. Second, we found cross-dimensional interactions on the level of intra-individual biases. That is, participants’ horizontal perceptual biases in interpretations (e.g., perceiving a gesture as directed more rightward than others) were related to their vertical perceptual biases. Third, we found cross-dimensional interactions on the level of intra-individual variability. That is, the vertical and horizontal interpretations of the same pointing gestures were correlated within participants and gestures. Together, these findings indicate that human spatial pointing perception is based on configural processing of a gesture on different levels of information processing.

Facial attractiveness does not modify the perceived trustworthiness of ethnic minority men

Immigrants, and particularly immigrant men, are often stereotyped as untrustworthy in European societies. However, little research has examined how stereotypes of characteristics other than ethnicity might impact natives’ perceptions of the trustworthiness of immigrants. Here, I test whether facial attractiveness, a trait associated with a variety of positive stereotypes, might modify ethnic biases in trustworthiness perceptions. I vary facial attractiveness and ethnicity using photo and name stimuli presented in a hypothetical “lost wallet” vignette, in which respondents assess the likelihood of the pictured man returning their lost wallet. Results from an German online panel survey indicate that while attractiveness has a modest positive effect on perceived trustworthiness, the value of attractiveness does not differ between ethnic majority German men and men with a Turkish migration background. Rather, the largest differences in the perceived trustworthiness of Turkish-origin men are found between respondents with inclusionary and exclusionary immigration attitudes, with inclusionary respondents reporting that Turkish-origin vignette persons are more trustworthy than ethnic majority German vignette persons. These results suggest that physical attractiveness does not act as a substantial moderator of ethnic biases in trustworthiness perceptions, but that immigration attitudes are highly relevant.

The Explanation That Hits Home: The Characteristics of Verbal Explanations That Affect Human Perception in Subjective Decision-Making

Human-AI collaborative decision-making can achieve better outcomes than either party individually. The success of this collaboration can depend on whether the human decision-maker perceives the AI contribution as beneficial to the decision-making process. Beneficial AI explanations are often described as relevant, convincing, and trustworthy. Yet, we know little about the characteristics of explanations that result in these perceptions. Focusing on collaborative subjective decision-making, using the context of subtle sexism, where explanations can surface new interpretations, we conducted a user study (N=20) to explore the structural and content characteristics that affect perceptions of human and AI-generated verbal (text and audio) explanations. We find four groups of characteristics ( Tone, Grammatical Elements, Argumentative Sophistication and Relation to User ), and that the effect of these characteristics on the perception of explanations for subtle sexism depends on the perceived author. Thus, we also identify which explanation characteristics participants use to identify the author of an explanation. Demonstrating the relationship between these characteristics and explanation perceptions, we present a categorized set of characteristics that system builders can leverage to produce the appropriate perception of an explanation for various sensitive contexts. We also highlight human perception biases and associated issues resulting from these perceptions.

Gender Bias in Residents’ Perceptions and Support of Rally Event Tourism: The Sierra Morena Rally of Córdoba, Spain

Motorsports have become a tourism resource for certain territories. Knowledge about the perception of impact and the support residents provide for their celebration contributes to ensuring their long-term success. The academic literature has so far focused on large-scale events, leaving a gap in knowledge regarding small-scale events. This study addresses the case of the Sierra Morena Rally in Córdoba, Spain. It is based on the principles of Social Exchange Theory (SET) and Social Representation Theory (SRT) to explore a gender bias in the perception of impact and support for the event. Using a sample of 753 residents, an Exploratory Factor Analysis is conducted, and Mann–Whitney U and Hedges’ G statistics are applied. The results confirm the existence of a gender bias in perception, which is discussed in the context of previous case studies.

Australian psychologists' attitudes towards psychedelic-assisted therapy and training following a world-first drug down-scheduling.

This study explores the attitudes of psychologists towards psychedelics and psychedelic-assisted therapy (PAT) following the world-first regulatory changes in 2023 in Australia which permitted psilocybin and 3,4-methylenedioxy-methamphetamine (MDMA) to be used in clinical services. A purposive sample of 20 Australian psychologists was recruited using snowball sampling. Semi-structured interviews were conducted which explored participants' attitudes, knowledge and concerns about PAT. Data were coded and analysed to identify and develop theme categories. Most psychologists exhibited positive attitudes towards psychedelics and their therapeutic potential, viewing them as promising for addressing chronic mental health conditions like depression. However, there was a notable concern regarding the limited evidence on efficacy and potential adverse experiences, as well as the complexity of the individualised treatment protocol. Despite enthusiasm, many psychologists had limited detailed knowledge about the interventions themselves. The need for comprehensive education and training programs, including exposure to psychedelic experiences and credible higher education institutions, was emphasised to ensure competence in administering PAT. Psychologists displayed notably positive attitudes towards PAT, likely reflecting both shifting perceptions of psychedelics and self-selection bias within the sample. Despite this optimism, concerns were raised about psychiatric risks and the necessity for comprehensive and reputable training and supervision. The cohort showed openness to both novel treatments and innovative training methods, underscoring the importance of enhancing educational frameworks to ensure effective implementation of PAT.

Assessing systematic biases in farmers’ local weather change perceptions

Scientific data concerning climate change are critical for designing mitigation and adaptation strategies. Equally important is how stakeholders perceive climate change because perceptions influence decision-making. In this paper, we employ spatially-delineated primary surveys to evaluate weather perception biases among corn and soybean farmers located on western frontier of the U.S. Corn Belt where substantial loss of grassland has been documented. We characterize farmers’ perception biases by measuring the gap between survey-based perception reports for three distinct weather indicators (i.e., temperature, precipitation and drought) and corresponding meteorological evidence. About 70% farmers in our sample misperceive past weather changes. Three-fourths of these misperceiving farmers over-estimate local temperatures and drought frequency and 40% of them under-estimate precipitation trends relative to past records. We further find evidence that farmers’ weather change perceptions are systematically biased in a manner that would justify past land use decisions. Particularly, higher cropping incidence on previously protected grasslands effected more farmers to under-perceive drier conditions and over-perceive wetter conditions. Our investigation of perception biases across distinct weather indicators with a reference to past economic decisions enriches the understanding of climate change perceptions and related policies.

A single-session feedback training modifies interpretation bias in individuals with high social anxiety: A randomized controlled trial.

The ability to interpret facial expressions accurately is important to adaptive social functioning. Social anxiety disorder is associated with a biased interpretation of facial emotions. This study aimed to demonstrate the effects of feedback training on modifying interpretation bias in individuals with high social anxiety. A total of 451 university students were screened, and 69 participants with high social anxiety were randomly assigned to either a training (n = 37) or a control (n = 32) group. Participants completed pre-questionnaires on social anxiety and depression symptoms, then performed a single session of experiment, followed by post-questionnaires on social anxiety symptoms. In the experiment, participants viewed an ambiguous facial expression and rated the intensity on a continuous scale. The training group received feedback that presented their ratings alongside the actual intensity, allowing them to accurately assess their emotional perception bias through trial-by-trial feedback. The control group received no feedback. The training group showed a significant reduction in interpretation bias for happy and angry faces after the experiment, while the control group did not. However, although the training group's social anxiety symptoms decreased post-experiment, the difference was not statistically significant compared to the control group. These findings provide preliminary evidence that the feedback training targeting dimensional ratings of emotions may be a promising option for correcting interpretation bias in individuals with high social anxiety. Future research could implement multiple sessions of training to potentially reduce both interpretation bias and social anxiety symptoms and verify the long-term effects.

The lasting effect of the Romantic view of nature: How it influences perceptions of risk and the support of symbolic actions against climate change.

Culture can have a major impact on how we perceive different hazards. In the Romantic period, nature was described and portrayed as mysterious and benevolent. A deep connection to nature was perceived as important. We proposed that this romantic view would be positively related to people's risk perceptions of man-made hazards and, more specifically, to concerns about climate change. Further, we hypothesized that the Romantic perception of nature leads to a biased perception of natural hazards and that the moral component of action is of particular importance above and beyond the mere efficacy of the action. We conducted an online survey in Germany (N=531), a country where Romanticism had a very widespread influence. The study shows that individuals with a Romantic view of nature perceived greater risks associated with climate change than those without such a view. In addition, those with a Romantic view of nature were more likely to support measures to reduce the risks of climate change, even when it is said that such measures are not effective. Finally, the study found a significantly higher positive correlation between Romantic views of nature and risk perceptions of man-made versus natural hazards. The results suggest that ideas developed during the Romantic era continue to influence hazard perception in Germany.

Impact of family members’ perception bias on service strategies of elder care institutions

Family members play an important role in the decision-making process of the elderly in accepting elder care services, which inevitably influences the operational strategy of elder care institutions (ECIs). Previous literature has focused on the disagreements between the elderly and their family members, but a research gap remains in examining the effects of family members’ perception bias on ECIs’ decisions to outsource service and on the elder care service market in general. Our study bridges this gap by employing a game-theoretic model that incorporates monopoly and duopoly markets to explore these effects. Our findings indicate that family members’ perception bias for ECIs’ services negatively impacts ECIs’ prices, demand, and profit. Moreover, we find that in the monopoly market, an ECI should adopt the outsourcing strategy to reduce losses if family members’ perception bias is higher. In the duopoly market, when family members’ perception bias is higher, if one ECI adopts the outsourcing strategy, then the other ECI should opt for the self-providing strategy, and vice versa. Furthermore, we observe that a higher perception bias decreases family surplus and social welfare in the monopoly market. However, it may sometimes benefit family surplus and social welfare in the duopoly market. Our results offer insightful takeaways for ECIs’ operational strategies and policymakers’ welfare policies in the elder care service market.

Estimation bias and serial dependence in speed perception

Studies have found that feature estimates are systematically compressed towards the distribution center, showing a central tendency. Additionally, the estimate of current features is affected by the previously seen feature, showing serial dependence or adaptation effect. However, these all remain unclear in the speed estimation. To address this question, we asked participants to estimate the speed of moving Gabor patches. In Experiment 1, speeds were selected from three uniform distributions with different lower and upper boundaries (i.e., slow, moderate, and fast ranges). In Experiment 2, speeds were arranged in an increasing, uniform, or decreasing distribution. The boundaries of three distributions were the same. The results found that speed estimates were systematically compressed towards the center of the uniform distribution center, showing a central tendency, and its size increased with the range boundaries. However, in the decreasing and increasing distributions, aside from central tendency, the speed estimates were also showed a bias away from the heavy tail of the distributions. Moreover, there was an attractive serial dependence that was not affected by the speed range. In summary, the current study, along with previous studies that reveal a slow-speed bias, comprehensively reveals various estimation biases in speed perception.

Enhanced salience of edge frequencies in auditory pattern recognition.

Within musical scenes or textures, sounds from certain instruments capture attention more prominently than others, hinting at biases in the perception of multisource mixtures. Besides musical factors, these effects might be related to frequency biases in auditory perception. Using an auditory pattern-recognition task, we studied the existence of such frequency biases. Mixtures of pure tone melodies were presented in six frequency bands. Listeners were instructed to assess whether the target melody was part of the mixture or not, with the target melody presented either before or after the mixture. In Experiment 1, the mixture always contained melodies in five out of the six bands. In Experiment 2, the mixture contained three bands that stemmed from the lower or the higher part of the range. As expected, Experiments 1 and 2 both highlighted strong effects of presentation order, with higher accuracies for the target presented before the mixture. Notably, Experiment 1 showed that edge frequencies yielded superior accuracies compared with center frequencies. Experiment 2 corroborated this finding by yielding enhanced accuracies for edge frequencies irrespective of the absolute frequency region. Our results highlight the salience of sound elements located at spectral edges within complex musical scenes. Overall, this implies that neither the high voice superiority effect nor the insensitivity to bass instruments observed by previous research can be explained by absolute frequency biases in auditory perception.

Top-down racial biases in size perception: A registered replication and extension of

Biases in the perception and judgment of members of race-based and ethnicity-based minority groups are prevalent, often resulting in detrimental outcomes for these individuals. One such bias is a threat-related stereotype, associating specific race and ethnicity-based social groups with aggressiveness, violence, and criminality. In the US context, Black men are often victims of such bias. Recent evidence suggests that threat-related stereotypes are also linked to biased perceptions, such that perceivers overestimate the body size of Black relative to White men, even in the absence of perceptual differences between them. That is, mere top-down social category information was sufficient to induce perceptual biases in size perception related to threat (Wilson et al., 2017, Study 7). Considering the novelty of this finding and its theoretical importance, we suggested a registered replication of this finding to assess its robustness across laboratories, participants, and social groups. We conducted a direct replication (Study 1, N = 280) of the effect reported by Wilson and colleagues, followed by a conceptual replication (Study 2, N = 280) that tested the generalization of the original findings to another population (Israeli residents) and a different target social group (Muslim Israelis) frequently stereotyped as threatening in this population. Participants did not overestimate the body size of Black or Muslim Israeli targets, pointing to a failed replication of the original effect. These findings suggest that the effects of purely top-down social category information on threat-related perception and judgment are less robust than previously assumed.

Partisan Impacts and Determinants for Internationalization of Ethiopian Pharmaceutical Products

<i>Background</i>: The pharmaceutical and related commodities manufacturing industry in Ethiopia is long-lived because the country is well-endowed with basic raw materials and local ownership and to some extent with machinery and technological know-how. The pharmaceutical industry, both globally and in Africa, encounters challenges in internationalizing products. In Ethiopia, challenges like regulatory complexities and limited government support hinder international market access for pharmaceutical products. This aim is to explore the barriers and understand why Ethiopian pharmaceuticals struggle to enter global markets. <i>Method</i>: The study adopted a mixed research approach, integrating qualitative and quantitative methods. It focuses on 15 pharmaceutical industries in Ethiopia, particularly those in Addis Ababa and the Oromia Special Zone, using probability and none probability sampling technique. The total study participants involved in the quantitative and qualitative studies were 373 and 15, respectively. Data collection comprises questionnaires, key informant interviews, and observation checklists, supplemented by secondary data from official and theoretical sources. Ethical considerations underscore obtaining verbal consent and ensuring confidentiality. Analysis entails descriptive statistics and qualitative synthesis, with numerical analysis conducted using STATA 14.1 software. <i>Results</i>: Out of the expected 384 study participants, 373 (97.13%) participated in our study, while the entire group of participants proposed in the qualitative study (15) also participated in this study. Key findings include resource constraints, regulatory issues, and biased perceptions against local products, hindering their global recognition. While strong political commitment and effective policy enforcement at the top government level are crucial, inadequate collaboration across government tiers undermines these efforts. Despite existing policies, inadequate implementation and procedural guidance diminish industry interest. There's uncertainty about government support for local pharmaceutical production, with persistent challenges like resource shortages and policy inconsistencies impeding progress. Perceptions vary on the effectiveness of policies promoting local production, and concerns about taxation issues impact the industry. Nevertheless, most respondents’ express confidence in the quality of domestically produced pharmaceuticals. <i>Conclusion</i>: Despite crucial government commitment, weak collaboration across levels impedes progress. Respondents note deficient policy implementation and doubt government support. Persistent issues like resource shortages persist, along with taxation concerns, despite locally produced products being perceived as equal in quality. To advance, better policy implementation, regulatory harmony, financial support, infrastructure enhancement, increased awareness, and improved collaboration are essential.

Ensemble percepts of colored targets among distractors are influenced by hue similarity, not categorical identity.

Color can be used to group similar elements, and ensemble percepts of color can be formed for such groups. In real-life settings, however, elements of similar color are often spatially interspersed among other elements and seen against a background. Forming an ensemble percept of these elements would require the segmentation of the correct color signals for integration. Can the human visual system do this? We examined whether observers can extract the ensemble mean hue from a target hue distribution among distractors and whether a color category boundary between target and distractor hues facilitates ensemble hue formation. Observers were able to selectively judge the target ensemble mean hue, but the presence of distractor hues added noise to the ensemble estimates and caused perceptual biases. The more similar the distractor hues were to the target hues, the noisier the estimates became, possibly reflecting incomplete or inaccurate segmentation of the two hue ensembles. Asymmetries between nominally equidistant distractors and substantial individual variability, however, point to additional factors beyond simple mixing of target and distractor distributions. Finally, we found no evidence for categorical facilitation in selective ensemble hue formation.

Perceptions of Anti-Black Bias in the Criminal Justice System Contribute to Pro-Black (Versus White) Bias in Criminal Justice Research

Black Americans experience more frequent guilty verdicts and harsher sentences in the criminal justice system. However, recent laboratory work often finds either trivial differences or a pro-Black bias where people provide more lenient verdicts for Black versus White defendants. Across five studies, we find a consistent pro-Black bias even after reducing social desirability concerns. Instead, the pro-Black bias results from a negative relationship between perceived anti-Black criminal justice bias and the Black suspect’s verdict. The current work shows the pro-Black bias as a consequence of the newly salient perception of racial bias in the criminal justice system. Consequently, as people’s perceptions of racial disparities in the criminal justice system increase, this in-lab effect may manifest in real-world criminal justice outcomes.

Happy couples “see” helpful partners: Relationship quality predicts biased perceptions of partner instrumentality to one's goals

AbstractPerceiving a romantic partner as instrumental to one's goals predicts myriad desirable relationship outcomes. However, little is known about the origins of perceived partner instrumentality (PPI)—particularly about factors that may bias PPI. In two studies, we provide evidence supporting the hypothesis that relationship quality predicts biased PPI. In a dyadic correlational study (Study 1) and an imagined scenario study in which we experimentally manipulated partner instrumentality levels (Study 2), participants reporting higher relationship quality perceived their partners as more instrumental to their goals—even when controlling for depressive symptoms, and when controlling for partner‐reported (Study 1) or enacted partner (Study 2) instrumentality. Additionally, in Study 1 (but not Study 2), relationship quality attenuated a negative association between depressive symptoms and PPI. Study 2 also revealed that perceiving a partner as more instrumental predicted greater intentions to provide instrumental support to that partner in the future. These findings fill important gaps in the instrumentality and relationships literature, identifying antecedents of PPI and offering insights into how PPI may predict relationship functioning.

The blind HR: Why do people leave managers not companies? A case of inconsistency in performance appraisal and performance outcome

Learning outcomes The learning outcomes are as follows: to benchmark and compare the theoretical models of the performance management and appraisal processes. (Questions 1 and 2) Remembering-in Bloom’s Taxonomy; to understand the importance of practicing fair performance appraisal process. (Question 4) Understanding-in Bloom’s Taxonomy; to analyze the implementation and effectiveness of 180-degree performance appraisal method and rating system prevalent in the IT Sector. (Question 1) Applying and Analyzing-in Bloom’s Taxonomy; to assess the impact of perceptual biases on human behavior and performance (Questions 2 and 3) Evaluating-in Bloom’s Taxonomy. Case overview/synopsis The case study entitled “Is HR Blind? Why do People Leave Managers Not Companies? A Case of Unfair Performance Appraisal and Biases” is a classic example of a flawed and biased performance appraisal process and perceptual biasness, which resulted in the loss of a valuable and talented resource in a leading Indian IT MNC. The present case had been based upon the real-life experience of an employee (i.e. Rahul Verma), who worked with the company from year 2010 to 2021. It was among the top ten IT MNCs employing about 0.1 million people. The objective of the case was to highlight real time issues existing with HR practices, mainly in IT sector organizations. For example, in the present case, do the HR seek proper justification from the manager before taking a harsh decision like forcibly asking an employee to sign a termination contract without looking at the contributions of his qualitative performance or even performance rating (refer to the transcript) for that matter? Was the job of the HR to only ensure how to fit in employees in the faulty bell curve system? Whether the performance appraisal system being followed at the company is adequately capable of identifying and recognizing the talent. Do the different functions really work cohesively and organically toward achieving the intended goals and objectives of the organization? Was this a failure of the manager in recognizing talent or something went wrong at the employee’s part? Was this a failure of the entire HR system or performance management process at the organization that was unable to filter out the capable and skilled resources out of the crowd? Was this a problem of organizational culture that put on stake its most critical resource – the human capital – by allowing the appraisers to evaluate them just because of the hierarchical structure, and not because they are not being competent enough to perform this most critical job objectively? Who ensures the appraiser is free from any kind of prejudice or bias and is capable of fairly assessing the talent resource? So, the present case was a deliberate attempt to throw out these burning questions to the practitioners and students to ponder upon. Does HR really follow the blind process merely acting on the feedback received from the different units of the organization? With the help of strong theoretical foundation and practical applications, the following objectives and questions have been framed to deliberate and propose the workable solutions for the benefits of the relevant stakeholders. Complexity academic level HR practitioners, HR managers, supervisors, senior management and HR students, IT heads, project managers. Supplementary material Teaching notes are available for educators only. Subject code CSS 6: Human Resource Management.

How Bar Chart Display Features can Skew Perception

This study empirically examines three display design features that can hinder or promote viewers’ perceptual bias of bar charts. Bar charts are commonly used in various landscapes, including business contexts, yet, research on their impact on bias is limited. In an experiment, 266 undergraduates viewed vertical bar charts with two styles of scaling (fine vs coarse), two formats of bar ordering (in a certain order vs in random order) and two patterns of bar width (same vs different). A 7-item quiz measured the level of perceptual bias. Results showed that the main effects of all three display features. The results revealed that the interaction of bar ordering formats and (1) the scaling styles and (2) the bar thickness patterns on viewers’ perceptual bias were significant. The other effects were not. In addition to extending the theoretical insight into visual deception in the contexts of bar charts, the findings provide practical guidelines for visual makers on bar chart designs that could lead to readers’ perceptual bias, and for visual viewers on how to properly decode the meaning embedded in bar charts.