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  1. Article ; Online: The Relative Importance of Target and Judge Characteristics in Shaping the Moral Circle.

    Jaeger, Bastian / Wilks, Matti

    Cognitive science

    2023  Volume 47, Issue 10, Page(s) e13362

    Abstract: People's treatment of others (humans, nonhuman animals, or other entities) often depends on whether they think the entity is worthy of moral concern. Recent work has begun to investigate which entities are included in a person's moral circle, examining ... ...

    Abstract People's treatment of others (humans, nonhuman animals, or other entities) often depends on whether they think the entity is worthy of moral concern. Recent work has begun to investigate which entities are included in a person's moral circle, examining how certain target characteristics (e.g., species category, perceived intelligence) and judge characteristics (e.g., empathy, political orientation) shape moral inclusion. However, the relative importance of target and judge characteristics in predicting moral inclusion remains unclear. When predicting whether a person will deem an entity worthy of moral consideration, how important is it to know who is making the judgment (i.e., characteristics of the judge), who is being judged (i.e., characteristics of the target), and potential interactions between the two factors? Here, we address this foundational question by conducting a variance component analysis of the moral circle. In two studies with participants from the Netherlands, the United States, the United Kingdom, and Australia (N = 836), we test how much variance in judgments of moral concern is explained by between-target differences, between-judge differences, and by the interaction between the two factors. We consistently find that all three components explain substantial amounts of variance in judgments of moral concern. Our findings provide two important insights. First, an increased focus on interactions between target and judge characteristics is needed, as these interactions explain as much variance as target and judge characteristics separately. Second, any theoretical account that aims to provide an accurate description of moral inclusion needs to consider target characteristics, judge characteristics, and their interaction.
    MeSH term(s) Humans ; Morals ; Judgment ; Analysis of Variance ; Australia ; Intelligence
    Language English
    Publishing date 2023-10-06
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2002940-8
    ISSN 1551-6709 ; 0364-0213
    ISSN (online) 1551-6709
    ISSN 0364-0213
    DOI 10.1111/cogs.13362
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The costs of lying: Consequences of telling lies on liar's self-esteem and affect.

    Preuter, Sanne / Jaeger, Bastian / Stel, Mariëlle

    The British journal of social psychology

    2023  Volume 63, Issue 2, Page(s) 894–908

    Abstract: Deceiving others is generally viewed as immoral. However, most people lie on a daily basis. This article examines the psychological consequences for the liars themselves, as they are participating in what is generally perceived as immoral behaviour. More ...

    Abstract Deceiving others is generally viewed as immoral. However, most people lie on a daily basis. This article examines the psychological consequences for the liars themselves, as they are participating in what is generally perceived as immoral behaviour. More specifically, this article focuses on the effects of lying on the liar's self-esteem and affect. We tested if lying, in comparison to telling the truth, lowers people's self-esteem and increases negative experienced affect. In total, three cross sectional and one longitudinal studies were conducted (N = 783). Results showed that lying decreased people's self-esteem and increased negative affect, regardless of the type of lie (self-centred vs. other-oriented). Furthermore, lying on a given day decreased people's self-esteem compared to their self-esteem on the previous day and to their average level of self-esteem across 5 days.
    MeSH term(s) Humans ; Deception ; Cross-Sectional Studies ; Self Concept
    Language English
    Publishing date 2023-12-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 625325-8
    ISSN 2044-8309 ; 0144-6665
    ISSN (online) 2044-8309
    ISSN 0144-6665
    DOI 10.1111/bjso.12711
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Psychological barriers to effective altruism: An evolutionary perspective.

    Jaeger, Bastian / van Vugt, Mark

    Current opinion in psychology

    2021  Volume 44, Page(s) 130–134

    Abstract: People usually engage in (or at least profess to engage in) altruistic acts to benefit others. Yet, they routinely fail to maximize how much good is achieved with their donated money and time. An accumulating body of research has uncovered various ... ...

    Abstract People usually engage in (or at least profess to engage in) altruistic acts to benefit others. Yet, they routinely fail to maximize how much good is achieved with their donated money and time. An accumulating body of research has uncovered various psychological factors that can explain why people's altruism tends to be ineffective. These prior studies have mostly focused on proximate explanations (e.g. emotions, preferences, lay beliefs). Here, we adopt an evolutionary perspective and highlight how three fundamental motives - parochialism, status, and conformity - can explain many seemingly disparate failures to do good effectively. Our approach outlines ultimate explanations for ineffective altruism, and we illustrate how fundamental motives can be leveraged to promote more effective giving.
    MeSH term(s) Altruism ; Biological Evolution ; Emotions ; Humans ; Motivation ; Social Behavior
    Language English
    Publishing date 2021-09-17
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 2831565-0
    ISSN 2352-2518 ; 2352-250X ; 2352-250X
    ISSN (online) 2352-2518 ; 2352-250X
    ISSN 2352-250X
    DOI 10.1016/j.copsyc.2021.09.008
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Perceptions of Farm Animal Sentience and Suffering: Evidence from the BRIC Countries and the United States.

    Mata, Fernando / Jaeger, Bastian / Domingues, Ivo

    Animals : an open access journal from MDPI

    2022  Volume 12, Issue 23

    Abstract: In this study, we examined how beliefs about farm animal sentience and their suffering vary across culture and demographic characteristics. A total of N = 5027) questionnaires were administered in Brazil, Russia, India, China, and the USA. Brazilians ... ...

    Abstract In this study, we examined how beliefs about farm animal sentience and their suffering vary across culture and demographic characteristics. A total of N = 5027) questionnaires were administered in Brazil, Russia, India, China, and the USA. Brazilians showed higher and Chinese lower levels of perceived animal sentience. In Russia and India, the perception of suffering and sentience increases with age, with similar levels to those observed in the USA. In all the countries, more people agreed than disagreed that animals are sentient. Men in India show higher levels of agreement with the relation between eating meat and animal suffering, followed by women in Brazil and China. Lower levels of agreement are observed in Americans and Chinese. Women show higher levels of compassion than men. In Russia, there is a slightly higher level of agreement between men and in the USA younger men agree more. Young American men show higher levels of agreement, while in India and China age has the opposite effect. For fair trading competition, it is important to standardize procedures and respect the demand for both animal protein and its ethical production. Overall, our results showed that perceptions of farm animal sentience and suffering vary substantially across countries and demographic groups. These differences could have important consequences for the perceived ethicality of meat production and consumption, and for global trade in animal products.
    Language English
    Publishing date 2022-12-04
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2606558-7
    ISSN 2076-2615
    ISSN 2076-2615
    DOI 10.3390/ani12233416
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Do Experimental Manipulations of Pathogen Avoidance Motivations Influence Conformity?

    van Leeuwen, Florian / Jaeger, Bastian / Sleegers, Willem W A / Petersen, Michael Bang

    Personality & social psychology bulletin

    2023  , Page(s) 1461672231160655

    Abstract: By conforming to ingroup norms, individuals coordinate with other group members, preserve cohesion, and avoid costs of exclusion. Previous experiments have shown that increased concerns about infectious disease increase conformity. However, coordination ... ...

    Abstract By conforming to ingroup norms, individuals coordinate with other group members, preserve cohesion, and avoid costs of exclusion. Previous experiments have shown that increased concerns about infectious disease increase conformity. However, coordination with other group members has multiple benefits, most of which exist independent of pathogenic infection. Hence, a strong causal effect of pathogen avoidance motivations on conformity seems unlikely. Results from five experiments (
    Language English
    Publishing date 2023-03-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2047603-6
    ISSN 1552-7433 ; 0146-1672
    ISSN (online) 1552-7433
    ISSN 0146-1672
    DOI 10.1177/01461672231160655
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: No credible evidence for links between 2D:4D and COVID-19 outcomes: A probabilistic perspective on digit ratio, ACE variants, and national case fatalities.

    Jones, Alex L / Jaeger, Bastian / Schild, Christoph

    Early human development

    2020  Volume 152, Page(s) 105272

    Abstract: Research into COVID-19 susceptibility and outcomes are critical, but claims must be carefully evaluated to inform policy decisions. In a recent series of articles, Manning and Fink [1-3] use national-level data to describe associations between case- ... ...

    Abstract Research into COVID-19 susceptibility and outcomes are critical, but claims must be carefully evaluated to inform policy decisions. In a recent series of articles, Manning and Fink [1-3] use national-level data to describe associations between case-fatality ratios and male and female finger ratios (2D:4D), a suggested measure of prenatal androgen exposure, as well as angiotensin-converting enzyme (ACE) allele and genotype frequencies. The authors suggest that 2D:4D is linked with ACE variant prevalence, and that higher male 2D:4D is associated with higher case fatality ratios, and point to 2D:4D as a useful prognostic measure for COVID-19 susceptibility. A critical review and robust Bayesian analysis of the hypothesis is described here, finding no conclusive evidence of COVID-19 mortality and 2D:4D, nor associations between 2D:4D and ACE1 allele or ACE2 genotype frequency. This absence of evidence is present for data taken from the second wave of COVID-19 in October 2020. Problematic theoretical grounding, individual-level conclusions drawn from national-level data, and issues with statistical inference in the original articles are discussed. Taken together, the current data offer no clear utility of 2D:4D in determining COVID-19 outcomes.
    MeSH term(s) Alleles ; Anthropometry ; COVID-19/genetics ; COVID-19/mortality ; Female ; Fingers ; Gene Frequency ; Genotype ; Humans ; Male ; Peptidyl-Dipeptidase A/genetics ; Prognosis
    Chemical Substances ACE protein, human (EC 3.4.15.1) ; Peptidyl-Dipeptidase A (EC 3.4.15.1)
    Language English
    Publishing date 2020-11-17
    Publishing country Ireland
    Document type Journal Article
    ZDB-ID 752532-1
    ISSN 1872-6232 ; 0378-3782
    ISSN (online) 1872-6232
    ISSN 0378-3782
    DOI 10.1016/j.earlhumdev.2020.105272
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: (Mis-)understanding COVID-19 and digit ratio: Methodological and statistical issues in Manning and Fink (2020).

    Jones, Alex L / Satchell, Liam P / Jaeger, Bastian / Schild, Christoph

    Early human development

    2020  Volume 148, Page(s) 105095

    MeSH term(s) Betacoronavirus ; COVID-19 ; Coronavirus Infections ; Female ; Humans ; Male ; Pandemics ; Pneumonia, Viral ; SARS-CoV-2 ; Sex Characteristics
    Keywords covid19
    Language English
    Publishing date 2020-05-29
    Publishing country Ireland
    Document type Letter ; Comment
    ZDB-ID 752532-1
    ISSN 1872-6232 ; 0378-3782
    ISSN (online) 1872-6232
    ISSN 0378-3782
    DOI 10.1016/j.earlhumdev.2020.105095
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: No credible evidence for 2D:4D and COVID-19 outcomes: A probabilistic perspective on digit ratio, ACE variants, and national case fatalities

    Jones, Alex L. / Jaeger, Bastian Schild Christoph

    Early Human Development

    Abstract: Research into COVID-19 susceptibility and outcomes are critical, but claims must be carefully evaluated to inform policy decisions In a recent series of articles, Manning and Fink [1–3] use national-level data to describe associations between case- ... ...

    Abstract Research into COVID-19 susceptibility and outcomes are critical, but claims must be carefully evaluated to inform policy decisions In a recent series of articles, Manning and Fink [1–3] use national-level data to describe associations between case-fatality ratios and male and female finger ratios (2D:4D), a suggested measure of prenatal androgen exposure, as well as angiotensin-converting enzyme (ACE) allele and genotype frequencies The authors suggest that 2D:4D is linked with ACE variant prevalence, and that higher male 2D:4D is associated with higher case fatality ratios, and point to 2D:4D as a useful prognostic measure for COVID-19 susceptibility A critical review and robust Bayesian analysis of the hypothesis is described here, finding no conclusive evidence of COVID-19 mortality and 2D:4D, nor associations between 2D:4D and ACE1 allele or ACE2 genotype frequency This absence of evidence is present for data taken from the second wave of COVID-19 in October 2020 Problematic theoretical grounding, individual-level conclusions drawn from national-level data, and issues with statistical inference in the original articles are discussed Taken together, the current data offer no clear utility of 2D:4D in determining COVID-19 outcomes
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #927210
    Database COVID19

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  9. Article ; Online: No credible evidence for 2D:4D and COVID-19 outcomes

    Jones, Alex L. / Jaeger, Bastian / Schild, Christoph

    Early Human Development

    A probabilistic perspective on digit ratio, ACE variants, and national case fatalities

    2020  , Page(s) 105272

    Keywords Obstetrics and Gynaecology ; Pediatrics, Perinatology, and Child Health ; covid19
    Language English
    Publisher Elsevier BV
    Publishing country us
    Document type Article ; Online
    ZDB-ID 752532-1
    ISSN 1872-6232 ; 0378-3782
    ISSN (online) 1872-6232
    ISSN 0378-3782
    DOI 10.1016/j.earlhumdev.2020.105272
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Can people detect the trustworthiness of strangers based on their facial appearance?

    Jaeger, Bastian / Oud, Bastiaan / Williams, Tony / Krumhuber, Eva G. / Fehr, Ernst / Engelmann, Jan B.

    2022  

    Abstract: Although cooperation can lead to mutually beneficial outcomes, cooperative actions only pay off for the individual if others can be trusted to cooperate as well. Identifying trustworthy interaction partners is therefore a central challenge in human ... ...

    Abstract Although cooperation can lead to mutually beneficial outcomes, cooperative actions only pay off for the individual if others can be trusted to cooperate as well. Identifying trustworthy interaction partners is therefore a central challenge in human social life. How do people navigate this challenge? Prior work suggests that people rely on facial appearance to judge the trustworthiness of strangers. However, the question of whether these judgments are actually accurate remains debated. The present research examines accuracy in trustworthiness detection from faces and three moderators proposed by previous research. We investigate whether people show above-chance accuracy (a) when they make trust decisions and when they provide explicit trustworthiness ratings, (b) when judging male and female counterparts, and (c) when rating cropped images (with non-facial features removed) and uncropped images. Two studies showed that incentivized trust decisions (Study 1, n = 131 university students) and incentivized trustworthiness predictions (Study 2, n = 266 university students) were unrelated to the actual trustworthiness of counterparts. Accuracy was not moderated by stimulus type (cropped vs. uncropped faces) or counterparts' gender. Overall, these findings suggest that people are unable to detect the trustworthiness of strangers based on their facial appearance, when this is the only information available to them.
    Keywords ddc:330
    Subject code 150
    Language English
    Publisher Amsterdam: Elsevier BV
    Publishing country de
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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