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1.
Conserv Biol ; : e14243, 2024 Mar 03.
Artigo em Inglês | MEDLINE | ID: mdl-38433373

RESUMO

Wildlife conservation depends on supportive social as well as biophysical conditions. Social identities such as hunter and nonhunter are often associated with different attitudes toward wildlife. However, it is unknown whether dynamics within and among these identity groups explain how attitudes form and why they differ. To investigate how social identities help shape wildlife-related attitudes and the implications for wildlife policy and conservation, we built a structural equation model with survey data from Montana (USA) residents (n = 1758) that tested how social identities affect the relationship between experiences with grizzly bears (Ursus arctos horribilis) and attitudes toward the species. Model results (r2  = 0.51) demonstrated that the hunter identity magnified the negative effect of vicarious property damage on attitudes toward grizzly bears (ß = -0.381, 95% confidence interval [CI]: -0.584 to -0.178, p < 0.001), which in turn strongly influenced acceptance (ß = -0.571, 95% CI: -0.611 to -0.531, p < 0.001). Our findings suggested that hunters' attitudes toward grizzly bears likely become more negative primarily because of in-group social interactions about negative experiences, and similar group dynamics may lead nonhunters to disregard the negative experiences that out-group members have with grizzly bears. Given the profound influence of social identity on human cognitions and behaviors in myriad contexts, the patterns we observed are likely important in a variety of wildlife conservation situations. To foster positive conservation outcomes and minimize polarization, management strategies should account for these identity-driven perceptions while prioritizing conflict prevention and promoting positive wildlife narratives within and among identity groups. This study illustrates the utility of social identity theory for explaining and influencing human-wildlife interactions.


La influencia de la identidad social sobre la actitud hacia la fauna Resumen La conservación de la fauna depende de condiciones de apoyo tanto sociales como biofísicas. La identidad social, como ser cazador o no, con frecuencia está asociada a las diferentes actitudes hacia la fauna. Sin embargo, no sabemos si las dinámicas dentro y entre estos grupos de identidad explican cómo las actitudes se forman y porqué son diferentes. Construimos un modelo de ecuación estructural con información de encuestas realizadas a 1,758 residentes de Montana (Estados Unidos) para conocer cómo la identidad social ayuda a formar la actitud relacionada con la fauna y las implicaciones que tiene para la conservación y políticas de fauna. El modelo analizó cómo la identidad social afecta la relación entre las experiencias con osos pardos (Ursus arctos horribilis) y la actitud hacia la especie. Los resultados del modelo (r2 = 0.51) demostraron que la identidad de cazador aumentaba el efecto negativo del daño indirecto a la propiedad sobre la actitud hacia los osos (ß=-0.381, 95% CI -0.584 a -0.178, p<0.001), lo cual en cambio tenía una gran influencia sobre la aceptación (ß=-0.571, 95% CI -0.611 a -0.531, p<0.001). Nuestros descubrimientos sugieren que la actitud de los cazadores hacia los osos probablemente se vuelve más negativa principalmente debido a las interacciones sociales del endogrupo en torno a las experiencias negativas; las dinámicas similares pueden llevar a los no cazadores a menospreciar las experiencias negativas que los miembros del exogrupo han tenido con los osos. Dada la influencia profunda que tiene la identidad social sobre la cognición humana y el comportamiento en una miríada de contextos, los patrones que observamos probablemente sean importantes en una variedad de situaciones de conservación de fauna. Para promover los resultados positivos de conservación y minimizar la polarización, las estrategias de manejo deberían considerar estas percepciones influenciadas por la identidad mientras se prioriza la prevención de conflictos y se promueven narrativas positivas de fauna dentro y entre los grupos de identidad. Este estudio demuestra la utilidad que tiene la teoría de identidad social para explicar e influenciar las interacciones humano-fauna.

2.
J Exp Child Psychol ; 241: 105858, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38310663

RESUMO

Adults are more likely to cooperate with in-group members than with out-group members in the context of social dilemmas, situations in which self-interest is in conflict with collective interest. This bias has the potential to profoundly shape human cooperation, and therefore it is important to understand when it emerges in development. Here we asked whether 6- to 9-year-old children (N = 146) preferentially cooperate with in-group members in the context of a well-studied social dilemma, the iterated Prisoner's Dilemma Game. We assigned children to minimal groups and paired them with unfamiliar same-age and same-gender peers. Consistent with our predictions, children were more likely to cooperate with in-group members than with out-group members in this minimal group context. This finding adds to the current literature on group bias in children's prosocial behavior by showing that it affects decision making in a context that calls on strategic cooperation. In addition, our analyses revealed an effect of gender, with girls more likely to cooperate than boys regardless of the group membership of their partner. Exploring this gender effect further, we found an interaction between gender and age across condition, with older girls showing less sensitivity to the group membership of their partner than younger girls and with older boys showing more sensitivity to the group membership of the partner than younger boys. Our findings suggest that risky cooperation in the face of social dilemmas is shaped by group bias during childhood, highlighting the potentially deeply rooted ties between cooperation and parochialism in humans.


Assuntos
Comportamento Cooperativo , Dilema do Prisioneiro , Masculino , Adulto , Criança , Feminino , Humanos
3.
Cogn Emot ; : 1-11, 2024 Jul 07.
Artigo em Inglês | MEDLINE | ID: mdl-38973172

RESUMO

While previous research has found an in-group advantage (IGA) favouring native speakers in emotional prosody perception over non-native speakers, the effects of semantics on emotional prosody perception remain unclear. This study investigated the effects of semantics on emotional prosody perception in Chinese words and sentences for native and non-native Chinese speakers. The critical manipulation was the congruence of prosodic (positive, negative) and semantic (positive, negative, and neutral) valence. Participants listened to a series of audio clips and judged whether the emotional prosody was positive or negative for each utterance. The results revealed an IGA effect: native speakers perceived emotional prosody more accurately and quickly than non-native speakers in Chinese words and sentences. Furthermore, a semantic congruence effect was observed in Chinese words, where both native and non-native speakers recognised emotional prosody more accurately in the semantic-prosody congruent condition than in the incongruent condition. However, in Chinese sentences, this congruence effect was only present for non-native speakers. Additionally, the IGA effect and semantic congruence effect on emotional prosody perception were influenced by prosody valence. These findings illuminate the role of semantics in emotional prosody perception, highlighting perceptual differences between native and non-native Chinese speakers.

4.
Cogn Psychol ; 145: 101593, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-37672819

RESUMO

Charitable giving involves a complex economic and social decision because the giver expends resources for goods or services they will never receive. Although psychologists have identified numerous factors that influence charitable giving, there currently exists no unifying computational model of charitable choice. Here, we submit one such model, based within the strictures of Psychological Value Theory (PVT). In four experiments, we assess whether charitable giving is driven by the perceived Psychological Value of the recipient. Across all four experiments, we simultaneously predict response choice and response time with high accuracy. In a fifth experiment, we show that PVT predicts charitable giving more accurately than an account based on competence and warmth. PVT accurately predicts which charity a respondent will choose to donate to and separately, whether a respondent will choose to donate at all. PVT models the cognitive processes underlying charitable donations and it provides a computational framework for integrating known influences on charitable giving. For example, we show that in-group preference influences charitable giving by changing the Psychological Values of the options, rather than by bringing about a response bias toward the in-group.


Assuntos
Cognição , Teoria Psicológica , Humanos , Tempo de Reação
5.
Sensors (Basel) ; 23(8)2023 Apr 16.
Artigo em Inglês | MEDLINE | ID: mdl-37112371

RESUMO

Recent migration and globalization trends have led to the emergence of ethnically, religiously, and linguistically diverse countries. Understanding the unfolding of social dynamics in multicultural contexts becomes a matter of common interest to promote national harmony and social cohesion among groups. The current functional magnetic resonance imaging (fMRI) study aimed to (i) explore the neural signature of the in-group bias in the multicultural context; and (ii) assess the relationship between the brain activity and people's system-justifying ideologies. A sample of 43 (22 females) Chinese Singaporeans (M = 23.36; SD = 1.41) was recruited. All participants completed the Right Wing Authoritarianism Scale and Social Dominance Orientation Scale to assess their system-justifying ideologies. Subsequently, four types of visual stimuli were presented in an fMRI task: Chinese (in-group), Indian (typical out-group), Arabic (non-typical out-group), and Caucasian (non-typical out-group) faces. The right middle occipital gyrus and the right postcentral gyrus showed enhanced activity when participants were exposed to in-group (Chinese) rather than out-group (Arabic, Indian, and Caucasian) faces. Regions having a role in mentalization, empathetic resonance, and social cognition showed enhanced activity to Chinese (in-group) rather than Indian (typical out-group) faces. Similarly, regions typically involved in socioemotional and reward-related processing showed increased activation when participants were shown Chinese (in-group) rather than Arabic (non-typical out-group) faces. The neural activations in the right postcentral gyrus for in-group rather than out-group faces and in the right caudate in response to Chinese rather than Arabic faces were in a significant positive correlation with participants' Right Wing Authoritarianism scores (p < 0.05). Furthermore, the activity in the right middle occipital gyrus for Chinese rather than out-group faces was in a significant negative correlation with participants' Social Dominance Orientation scores (p < 0.05). Results are discussed by considering the typical role played by the activated brain regions in socioemotional processes as well as the role of familiarity to out-group faces.


Assuntos
Encéfalo , Reconhecimento Visual de Modelos , Feminino , Humanos , Reconhecimento Visual de Modelos/fisiologia , Encéfalo/diagnóstico por imagem , Imageamento por Ressonância Magnética , Mapeamento Encefálico , Reconhecimento Psicológico/fisiologia
6.
Cross Cult Res ; 57(2-3): 193-238, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38603334

RESUMO

The COVID-19 pandemic has affected 222 countries and territories around the globe. Notably, the speed of COVID-19 spread varies significantly across countries. This cross-cultural research proposes and empirically examines how national culture influences the speed of COVID-19 spread in three studies. Study 1 examines the effects of Hofstede's national cultural dimensions on the speed of COVID-19 spread in 60 countries. Drawing on the GLOBE study (House et al., 2004), Study 2 investigates how GLOBE cultural dimensions relate to the speed of the pandemic's spread in 55 countries. Study 3 examines the effect of cultural tightness in 31 countries. We find that five national cultural dimensions - power distance, uncertainty avoidance, humane orientation, in-group collectivism, and cultural tightness - are significantly related to the speed of COVID-19 spread in the initial stages, but not in the later stages, of the pandemic. Study 1 shows that the coronavirus spreads faster in countries with small power distance and strong uncertainty avoidance. Study 2 supports these findings and further reveals that countries with low humane orientation and high in-group collectivism report a faster spread of the disease. Lastly, Study 3 shows that COVID-19 spreads slower in countries with high cultural tightness.

7.
Curr Psychol ; : 1-11, 2023 Mar 09.
Artigo em Inglês | MEDLINE | ID: mdl-37359700

RESUMO

Trust Game and survey trust are the two most popular measurements in the field of trust research, but most studies conducted in developing countries have found low or even insignificant correlations between them, we therefore validated this phenomenon in the cultural context of the largest developing country, China. Within-country differences can be of the same magnitude as the between country differences, especially in a culturally diverse China. Thus, we focus on comparing the characteristics of trust in the South and North regions of China. Through zero-order correlation and hierarchical regression analysis, our findings are consistent with those of numerous developing countries: Trust Game is lowly correlated with in-group trust survey and not with out-group trust survey. On the other hand, we found that Chinese individuals exhibit a distinct pattern of in-group trust, and there is no fundamental difference in the characteristics of trust between the South and the North.

8.
Omega (Westport) ; 86(4): 1212-1234, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33818158

RESUMO

Considerable effort has gone into studying bereavement in children, adults and the elderly, but few studies have investigated the effects of bereavement or grief interventions in young adults. Even fewer studies have reported on the effect of interventions for young adults with grief complications. The present study seeks to help fill this gap by describing a Danish treatment program specially developed for young adults with complicated grief reactions. The dual process model of coping with bereavement, psychodynamic theory, and a narrative approach provide the foundation for the treatment. In addition, it utilizes an eclectic use of techniques and a group treatment modality that involves providing individual therapy within a group context. The core elements of the treatment are discussed and then exemplified in two case studies.


Assuntos
Luto , Psicoterapia de Grupo , Criança , Humanos , Adulto Jovem , Idoso , Pesar , Adaptação Psicológica , Inquéritos e Questionários
9.
Psychol Sci ; 33(5): 752-764, 2022 05.
Artigo em Inglês | MEDLINE | ID: mdl-35436148

RESUMO

Beginning in infancy, children expect individuals in a group to care for and be loyal to in-group members. One prominent cue that children use to infer that individuals belong to the same group is similarity. Does any salient similarity among individuals elicit an expectation of in-group preference, or does contextual information modulate these expectations? In Experiments 1 and 2, 12-month-old infants expected in-group preference between two individuals who wore the same novel outfit, but they dismissed this similarity if one of the outfits was used to fulfill an instrumental purpose. In Experiment 3, 26-month-old toddlers expected in-group preference between two individuals who uttered the same novel labels, but they dismissed this similarity if the labels were used to convey incidental as opposed to categorical information about the individuals. Together, the results of these experiments (N = 96) provide converging evidence that from early in life, children possess a context-sensitive mechanism for determining whether similarities mark groups.


Assuntos
Resolução de Problemas , Pré-Escolar , Humanos , Lactente
10.
J Interact Market ; 57(2): 198-211, 2022 May.
Artigo em Inglês | MEDLINE | ID: mdl-35656556

RESUMO

Buddies, serving as in-group influencers to aid demographically similar cobuddies, are extensively used in face-to-face support groups to enhance positive social influence. The authors examine the efficacy of buddies in online support groups and investigate underlying mediating processes using social network analysis. They observe what happens when members of support groups for quitting smoking, including members who are relatively active and less active in the group, after a few days are called on to be buddies and assigned to specific cobuddies. The findings indicate that, consistent with normative expectations for buddies, members form especially strong ties with their designated cobuddies. The more active buddies are in the group, the stronger the ties they form with their cobuddies and, in turn, their cobuddies form stronger ties with group members overall, which then relates to cobuddy goal attainment. The findings suggest that interactive marketers should consider using buddies in online support groups but observe activity levels before making buddy assignments, because positive outcomes are contingent on buddies being active in the group. Marketers should also ensure that online support group members post to everyone, not just their buddies, because ties formed among group members as a whole are crucial for goal attainment.

11.
Int J Psychol ; 57(4): 456-465, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-34008213

RESUMO

Although anti-immigrant attitudes continue to be expressed around the world, identifying these attitudes as prejudice, truth or free speech remains contested. This contestation occurs, in part, because of the absence of consensually agreed-upon understandings of what prejudice is. In this context, the current study sought to answer the question, "what do people understand to be prejudice?" Participants read an intergroup attitude expressed by a member of their own group (an "in-group" member) or another group (an "out-group" member). This was followed by an interpretation of the attitude as either "prejudiced" or "free speech." This interpretation was also made by in-group or an out-group member. Subsequent prejudice judgements were influenced only by the group membership of the person expressing the initial attitude: the in-group member's attitude was judged to be less prejudiced than the identical attitude expressed by an out-group member. Participants' judgements of free speech, however, were more complex: in-group attitudes were seen more as free speech than out-group attitudes, except when an in-group member interpreted those attitudes as prejudice. These data are consistent with the Social Identity Approach to intergroup relations, and have implications for the processes by which intergroup attitudes become legitimised as free speech instead of prejudice.


Assuntos
Emigrantes e Imigrantes , Identificação Social , Atitude , Humanos , Relações Interpessoais , Preconceito , Fala
12.
Curr Psychol ; : 1-13, 2022 Jul 29.
Artigo em Inglês | MEDLINE | ID: mdl-35967507

RESUMO

Psychological dependence is the most important factor leading to relapse, few studies have examined whether in-group stereotypes exist in drug abusers, while it's helpful for drug abusers in getting rid of psychological dependence. To investigate the presence of in-group stereotypes and the neural mechanisms in drug abusers, two experiments were designed in this study. Experiment 1 used a classification-verification paradigm and Experiment 2 used The Extrinsic Affect Simon Task (EAST), simultaneous collection of EEG data from China. 18 and 17 males were analyzed respectively in Experiment 1 and 2. The results in Experiment 1 showed that (1) there was no significant difference in reaction times or N400 amplitude between the condition "Drug abusers-Negative words" and the condition "Drug abusers-Positive words". In Experiment 2, we found that (2) participants in the condition "Drug abusers-Negative words" scored higher in accuracy rates than in the condition "Drug abusers-Positive words". (3) Participants in the condition "Drug abusers-Negative words" were shorter than "Drug abusers-Positive words" in reaction times (RTs). (4) Participants in the condition "Drug abusers-Negative words" were lower than "Drug abusers-Positive words" in the peak of N400. The conclusion is that there are significant negative implicit in-group stereotypes among Chinese male drug abusers. The experimental results and the uniqueness of Chinese male drug abusers in this study were discussed.

13.
Twin Res Hum Genet ; 24(5): 264-272, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34957941

RESUMO

Using data from the Midlife Development in the USA (MIDUS) sample (3070 men and 3182 women) and the Wisconsin Longitudinal Study (WLS; 2240 men and 2346 women), we aimed to investigate whether religious, ethnic and racial in-group preferences as well as religious homogamy are associated with reproductive outcome in terms of number of children. Using data from the MIDUS twin sample, we further estimated the inherited genetic component of in-group attitudes. Additionally, we analyzed the association of ∼50 polygenic scores (PGSs) recently published for the WLS study and in-group attitudes as an indicator of potential pleiotropic effects. We found in both samples that, with one exception, religious though not other in-group attitudes are associated with a higher reproductive outcome. Also, religious homogamy is associated with higher average number of children. The inherited component of all in-group attitudes ranges from ∼21% to 45% (MIDUS twin sample). PGSs associated with religious behavior are significantly positively associated with religious in-group attitudes as well as family attitudes. Further associations are found with PGS on life satisfaction (work) and, negatively, with PGS for any sort of addiction (smoking, alcohol and cannabis use), indicating pleiotropy. We conclude that the positive association between religious in-group attitudes as well as religious homogamy and reproductive outcome may indicate selective forces on religious in-group behavior. As all investigated in-group attitudes, however, have a substantial inherited component, we further speculate that potential previous reproductive benefits of racial and ethnic in-group preferences, if they ever existed, might have been substituted by religious in-group preferences.


Assuntos
Casamento , Religião , Criança , Feminino , Fertilidade , Genômica , Humanos , Estudos Longitudinais , Masculino , Estados Unidos
14.
J Youth Adolesc ; 50(8): 1709-1725, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-33829402

RESUMO

Schools can be important for the development of national belonging in students with immigrant backgrounds. Following Contact Theory and prior research on diversity norms, this cross-sectional survey study examined if intergroup contact and perceived diversity norms of teachers and classmates predicted national belonging in ethnic minority (i.e., Turkish [n = 95], Moroccan [n = 73], and Surinamese [n = 15]) versus majority students (n = 213) living in the Netherlands (Mage = 10.53 years; 50.3% female). Minority students reported less national belonging than their ethnic Dutch classmates. Multilevel analyses indicated that their national belonging was affected by the presence of ethnic Dutch classmates and the relationship with their teacher. These results indicate that minority students' national belonging could be promoted by reducing school segregation and stimulating positive teacher-student relationships.


Assuntos
Etnicidade , Grupos Minoritários , Criança , Estudos Transversais , Feminino , Humanos , Masculino , Países Baixos , Instituições Acadêmicas , Estudantes
15.
Cereb Cortex ; 29(8): 3380-3389, 2019 07 22.
Artigo em Inglês | MEDLINE | ID: mdl-30272123

RESUMO

Individuals from different social groups interpret the world in different ways. This study explores the neural basis of these group differences using a paradigm that simulates natural viewing conditions. Our aim was to determine if group differences could be found in sensory regions involved in the perception of the world or were evident in higher-level regions that are important for the interpretation of sensory information. We measured brain responses from 2 groups of football supporters, while they watched a video of matches between their teams. The time-course of response was then compared between individuals supporting the same (within-group) or the different (between-group) team. We found high intersubject correlations in low-level and high-level regions of the visual brain. However, these regions of the brain did not show any group differences. Regions that showed higher correlations for individuals from the same group were found in a network of frontal and subcortical brain regions. The interplay between these regions suggests a range of cognitive processes from motor control to social cognition and reward are important in the establishment of social groups. These results suggest that group differences are primarily reflected in regions involved in the evaluation and interpretation of the sensory input.


Assuntos
Encéfalo/diagnóstico por imagem , Cognição/fisiologia , Discriminação Social , Identificação Social , Encéfalo/fisiologia , Mapeamento Encefálico , Lobo Frontal/diagnóstico por imagem , Lobo Frontal/fisiologia , Neuroimagem Funcional , Humanos , Imageamento por Ressonância Magnética , Masculino , Lobo Occipital/diagnóstico por imagem , Lobo Occipital/fisiologia , Futebol , Lobo Temporal/diagnóstico por imagem , Lobo Temporal/fisiologia , Vias Visuais/diagnóstico por imagem , Vias Visuais/fisiologia , Adulto Jovem
16.
J Exp Child Psychol ; 198: 104906, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-32631614

RESUMO

The ability to deceive others is an early-emerging and socially complex skill, but relatively little is known about when and how a social partner's identity affects young children's willingness to lie. To understand how group membership affects children's lying, we used a minimal group paradigm to examine children's willingness to deceive in-group and out-group members across varied contexts that systematically varied in their costs and benefits. A total of 69 children aged 4 to 7 years played three versions of a sticker-hiding game: a Self-Benefit scenario (child could lie for personal gain), an Other-Benefit scenario (child could lie to help someone else), and a No-Benefit scenario (child could lie to spite someone else). Children lied the most in the Self-Benefit scenario, lying equally to in-group and out-group members in this context. When the potential for self-gain disappeared, however, in-group bias emerged. In the Other-Benefit scenario, children lied more to out-group members in order to help in-group members. Even when the potential to help another was removed (the No-Benefit scenario), children still engaged in more lie telling to out-group members. Results suggest that children's lying is sensitive to group membership, but only in certain social situations, as children's desire to benefit themselves may outweigh in-group bias. Future research should examine alternate contexts, such as lying to avoid punishment, to determine when group membership is most salient. Overall, results indicate that young children are able to flexibly apply a complex social cognitive skill based on group membership and contextual demands, with implications for social behavior and intergroup relations throughout development.


Assuntos
Comportamento Infantil/psicologia , Enganação , Processos Grupais , Comportamento Social , Percepção Social , Pensamento/fisiologia , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Punição
17.
J Exp Child Psychol ; 193: 104807, 2020 05.
Artigo em Inglês | MEDLINE | ID: mdl-32028252

RESUMO

Children display explicit social preferences for native-accented and same-race peers, but when these two markers are in conflict, they prefer native-accented other-race peers over foreign-accented same-race peers. However, to what extent do these preferences translate into children's behavior toward others? This study investigated children's resource distribution decisions based on photographs of unfamiliar children who differed in accent and race. A total of 77 native English-speaking, White 5- to 10-year-old children were given three coins to distribute to pairs of recipients, with an option to distribute equally by discarding a resource. Children under 7 years gave selectively more coins to recipients who shared their accent and race, whereas children aged 7 and 8 years gave more coins to their accent in-group only when it was paired with the out-group race. Children aged 9 and 10 years consistently gave more coins to their accent in-group despite the racial category. It was concluded that, with age, accent becomes an increasingly used social marker in guiding children's resource distribution decisions.


Assuntos
Desenvolvimento Infantil/fisiologia , Processos Grupais , Reconhecimento Psicológico/fisiologia , Comportamento Social , Percepção da Fala/fisiologia , Criança , Pré-Escolar , Feminino , Humanos , Masculino
18.
BMC Genomics ; 20(Suppl 2): 224, 2019 Apr 04.
Artigo em Inglês | MEDLINE | ID: mdl-30967106

RESUMO

BACKGROUND: Time series single-cell RNA sequencing (scRNA-seq) data are emerging. However, the analysis of time series scRNA-seq data could be compromised by 1) distortion created by assorted sources of data collection and generation across time samples and 2) inheritance of cell-to-cell variations by stochastic dynamic patterns of gene expression. This calls for the development of an algorithm able to visualize time series scRNA-seq data in order to reveal latent structures and uncover dynamic transition processes. RESULTS: In this study, we propose an algorithm, termed time series elastic embedding (TSEE), by incorporating experimental temporal information into the elastic embedding (EE) method, in order to visualize time series scRNA-seq data. TSEE extends the EE algorithm by penalizing the proximal placement of latent points that correspond to data points otherwise separated by experimental time intervals. TSEE is herein used to visualize time series scRNA-seq datasets of embryonic developmental processed in human and zebrafish. We demonstrate that TSEE outperforms existing methods (e.g. PCA, tSNE and EE) in preserving local and global structures as well as enhancing the temporal resolution of samples. Meanwhile, TSEE reveals the dynamic oscillation patterns of gene expression waves during zebrafish embryogenesis. CONCLUSIONS: TSEE can efficiently visualize time series scRNA-seq data by diluting the distortions of assorted sources of data variation across time stages and achieve the temporal resolution enhancement by preserving temporal order and structure. TSEE uncovers the subtle dynamic structures of gene expression patterns, facilitating further downstream dynamic modeling and analysis of gene expression processes. The computational framework of TSEE is generalizable by allowing the incorporation of other sources of information.


Assuntos
Algoritmos , Biologia Computacional/métodos , Desenvolvimento Embrionário , Regulação da Expressão Gênica no Desenvolvimento , Sequenciamento de Nucleotídeos em Larga Escala/métodos , Análise de Sequência de RNA/métodos , Análise de Célula Única/métodos , Animais , Perfilação da Expressão Gênica , Humanos , Fatores de Tempo , Peixe-Zebra/genética
19.
Psychol Sci ; 30(4): 563-575, 2019 04.
Artigo em Inglês | MEDLINE | ID: mdl-30785368

RESUMO

The persistent threat of natural disasters and their attendant resource shocks has likely shaped our prosocial drives throughout human evolution. However, it remains unclear how specific experiences during these events might impact cooperative decision making. We conducted two waves of four modified dictator-game experiments with the same individuals in Vanuatu ( N = 164), before and after Cyclone Pam in 2015. After the cyclone, participants were generally less likely to show prosocial motives toward both in-group and out-group members and more likely to show parochialism when sharing between groups. Experiencing greater property damage predicted a general decrease in prosocial allocations and preference for participants' in-group. By contrast, exposure to other people in distress predicted increased prosocial allocations to both participants' in-group and out-groups. Our results suggest that people adjust their prosocial behavior in response to natural disasters but that the nature and direction of the effect depend on the type and severity of their experiences.


Assuntos
Comportamento Cooperativo , Jogos Experimentais , Relações Interpessoais , Desastres Naturais , Comportamento Social , Adulto , Altruísmo , Conflito Psicológico , Tomada de Decisões , Economia Comportamental , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Motivação , Valores Sociais , Adulto Jovem
20.
Proc Natl Acad Sci U S A ; 113(1): 80-5, 2016 Jan 05.
Artigo em Inglês | MEDLINE | ID: mdl-26699464

RESUMO

Deficits in empathy enhance conflicts and human suffering. Thus, it is crucial to understand how empathy can be learned and how learning experiences shape empathy-related processes in the human brain. As a model of empathy deficits, we used the well-established suppression of empathy-related brain responses for the suffering of out-groups and tested whether and how out-group empathy is boosted by a learning intervention. During this intervention, participants received costly help equally often from an out-group member (experimental group) or an in-group member (control group). We show that receiving help from an out-group member elicits a classical learning signal (prediction error) in the anterior insular cortex. This signal in turn predicts a subsequent increase of empathy for a different out-group member (generalization). The enhancement of empathy-related insula responses by the neural prediction error signal was mediated by an establishment of positive emotions toward the out-group member. Finally, we show that surprisingly few positive learning experiences are sufficient to increase empathy. Our results specify the neural and psychological mechanisms through which learning interacts with empathy, and thus provide a neurobiological account for the plasticity of empathic reactions.


Assuntos
Córtex Cerebral/fisiologia , Empatia/fisiologia , Aprendizagem/fisiologia , Processos Grupais , Humanos , Imageamento por Ressonância Magnética , Masculino , Neuroimagem , Plasticidade Neuronal/fisiologia , Distribuição Aleatória , Adulto Jovem
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