Social Behavior Research Articles

Patterns of depression symptoms in relation to stressors and social behaviors during the COVID-19 pandemic among older youth and emerging adults in the United States.

Substantial increases in depression at the outset of the pandemic were previously reported in NCANDA, a longitudinal sample of adolescents and young adults. The current NCANDA study examined depression symptoms before and during the COVID-19 pandemic. It evaluated the influence of stressors and social behavior (e.g., in-person and online socializing) with linear mixed effects models. A strong, positive association between COVID-19-related stressors and depression symptoms was observed. The frequency of in-person socializing did not account for the totality of the changes in depression observed during the early COVID-19 pandemic. It may be that pandemic-related stressors counteracted the benefits of in-person interactions during the early stages of the COVID-19 pandemic. Future studies can continue to elucidate the interactions among psychosocial, genetic, and behavioral factors contributing to depression symptoms in the unprecedented context of the COVID-19 pandemic.

Solitude and serotonin: juvenile isolation alters the covariation between social behavior and cFos expression by serotonergic neurons

Variation in the mutual responsiveness of social partners to each other can be reflected in behavioral suites that covary with neural activity in ways that track the salience or valence of interactions. Juvenile social isolation alters social behavior and neural activity during social interaction, but whether and how it alters the covariation between behavior and neural activity has not been as well explored. To address this issue, four classes of experimental subjects: isolated males, socially housed males, isolated females, and socially housed females, were paired with an opposite-sex social partner that had been socially housed. Social behaviors and c-Fos expression in the serotonergic dorsal raphe nucleus (DRN) were then measured in subjects following the social interactions. Relative to social housing, postweaning isolation led to a decrease in the density of neurons double-labeled for tryptophan hydroxylase and c-Fos in the dorsomedial subdivision of the DRN, regardless of sex. Vocal and non-vocal behaviors were also affected by isolation. In interactions with isolated males, both ultrasonic vocalization (USVs) and broadband vocalizations (squeaks) increased in conjunction with greater male investigation of females. Neural and behavioral measures also correlated with each other. In the isolated male group, the density of double-labeled neurons in the dorsomedial DRN was negatively correlated with USV production and positively correlated with a principal component of non-vocal behavior corresponding to greater defensive kicking by females and less investigation and mounting behavior. This correlation was reversed in direction for socially housed males, and for isolated males versus isolated females. These findings confirm that the dynamics of social interactions are reflected in c-Fos activation in the dorsomedial DRN, and suggest an altered responsiveness of serotonergic neurons to social interaction following social isolation in males, in parallel with an altered male response to female cues.

EXPRESS: Is the precedence of social re-orienting only inherent to the initiators?

Previous researches have revealed that initiators preferentially re-orient their attention towards responders with whom they have established joint attention. However, it remains unclear whether this precedence of social re-orienting is inherent to initiators or applies equally to responders, and whether this social re-orienting is modulated by the social contexts in which joint attention is achieved. To address these issues, the present study adopted a modified virtual-reality paradigm to manipulate social roles (initiator vs. responder), social behaviors (JA vs. Non-JA), and social contexts (intentional vs. incidental). Results indicated that people, whether as initiators or responders, exhibited a similar prioritization pattern of social re-orienting, and this was independent of the social contexts in which joint attention was achieved, revealing that the prioritization of social re-orienting is an inherent social attentional mechanism in humans. It should be noted, however, that the distinct social cognitive systems engaged when individuals switched roles between initiator and responder were only driven during intentional (Experiment 1) rather than incidental (Experiment 2) joint attention. These findings provide potential insights for understanding the shared-attention system and the integrated framework of attentional and mentalizing processes.

Cannabidiol partially rescues behavioral, neuroinflammatory and endocannabinoid dysfunctions stemming from maternal obesity in the adult offspring

Maternal obesity is known to increase the risk of psychiatric disorders, such as anxiety, depression, schizophrenia and autism spectrum disorder in the offspring. While preventive measures are well-documented, practical approaches for addressing the damages once they are already established are limited. We have recently demonstrated the interplay between maternal obesity and treatment with cannabidiol (CBD) on neuroinflammation and peripheral metabolic disturbances during adolescence, however, it is known that both factors tend to vary throughout life. Therefore, here we investigated the potential of CBD to mitigate these alterations in the adult offspring of obese dams. Female Wistar rats were fed a cafeteria diet for 12 weeks prior to mating, and during gestation and lactation. Offspring received CBD (50 mg/kg) for 3 weeks from the 70th day of life. Behavioral tests assessed anxiety-like manifestations and social behavior, while neuroinflammatory and endocannabinoid markers were evaluated in the hypothalamus, prefrontal cortex (PFC) and hippocampus, as well as the biochemical profile in the plasma. CBD treatment attenuated maternal obesity-induced anxiety-like and social behavioral alterations, restoring exacerbated astrocytic and microglial markers in the hypothalamus, PFC and hippocampus of the offspring, as well as endocannabinoid levels in the PFC, with notable sex differences. Additionally, CBD attenuated plasma glucose and lipopolysaccharides (LPS) concentrations in females. These findings underscore the persistent influence of maternal obesity on the offspring's health, encompassing metabolic irregularities and behavioral impairments, as well as the role of the endocannabinoid system in mediating these outcomes across the lifespan.

Using social media to communicate competence, ordinariness, and authenticity in political leadership

Abstract Understanding how political leaders use social media during election campaigns is a growing area of research, with existing literature focussing on single-election examinations of platform usage (Smith 2021). This paper instead conducts a longitudinal examination of political leadership on Twitter/X at the 2015, 2017, and 2019 UK general elections, focussing on the different ways in which leaders portray their competence, ordinariness, and authenticity. In analysing 2,694 posts during the short campaign period by the various leaders of the Conservatives, Labour, Liberal Democrats, and the Scottish National Party, enables the examination of both changing social media behaviours and individual constructions of leadership under the same party label.

The moderating role of emotional intelligence and HR digitalization on the relationship between compensation and employee job performance in Johor manufacturing sector

This research examines the moderating role of emotional intelligence and HR digitalization on the relationship between compensation and employee job performance in Johor manufacturing sector. The manufacturing sector, which has contributed significantly to the Malaysian national GDP, was among the most affected sectors during the remote work movement caused by several Covid-19. One of the most critical aspects was managing human resources (HR) in remote work and the challenges faced by the employees working online. Drawing upon the Theory of Social Exchange and Ability model of Emotional Intelligence, this practical study investigated the influence of compensation (COM) on employee job performance (EJP) with the moderation of human resource digitalization (HRDi) and emotional intelligence (EI). A quantitative methodology based on online and hard-copy questionnaires was adopted. The population of this study consisted of management employees, such as directors, managers, executives, and administrators working in Johor manufacturing companies. A total of 318 responses was used in this study. Utilising SPSS and Smart PLS, the researcher analysed preliminary and pilot studies, data screening and cleaning procedures, exploratory factor analysis, as well as partial least squares structural equation modeling to assess the relationships among variables and test the hypotheses. The research findings demonstrated that compensation directly affects employee job performance. Meanwhile, human resource digitalization moderates the relationships between compensation and job performance of employees. In addition, emotional intelligence moderates the relationships between compensation and employee job performance. Policymakers are urged to encourage HR digitalization implementation and training on enhancing emotional intelligence. Besides, organizations should have plans on how to enhance their implementation of HR digitalization and improve emotional intelligence.

Exploring Children’s Self-Reports of Victimisation Experiences and Solitary, Prosocial, and Aggressive Behaviours

Young children’s social behaviour plays an important role in their lives. Most research makes use of reports from adults and peers, rather than speaking to young children about their own behaviour. The current study was exploratory and looked at children’s self-reports of solitary, prosocial and aggressive behaviours, and victimisation experiences, during the formative school years. Children aged between four and seven years (n = 193) were recruited from three primary schools. Using an innovative method with stick-figure animations, they were asked to provide frequency ratings of 16 of their own behaviours. Class teachers were also asked to provide ratings for the participating children’s behaviours. Key findings showed that children offer unique insight into their behaviour and experiences. Specifically, children’s self-reports of victimisation experiences are more complex than their teachers; and teachers were found to under-report solitary behaviour in boys in comparison to self-reports. Self-reports of prosocial and aggressive behaviour showed some possible social desirability amongst 6–7-year-olds, but there are also potential situational and gender biases in reports from their teachers. These findings show the importance of including young children’s self-reports in the study of their behaviour.

Early life stress induces decreased expression of CB1R and FAAH and epigenetic changes in the medial prefrontal cortex of male rats

Several studies in both animal models and in humans have provided substantial evidence that early life stress (ELS) induces long-term changes in behavior and brain function, making it a significant risk factor in the aetiology of various mental disorders, including anxiety and depression. In this study, we tested the hypothesis that ELS in male rats (i) leads to increased anxiety and depressive-like symptoms; and (ii) that these behavioral changes are associated with functional alterations in the endocannabinoid system of the medial prefrontal cortex (mPFC). We further assessed whether the predicted changes in the gene expression of two key components of the endocannabinoid system, cannabinoid receptor 1 (CB1R) and the fatty acid amide hydrolase (FAAH), are regulated by epigenetic mechanisms. Behavioral profiling revealed that the proportion of behaviorally affected animals was increased in ELS exposed male rats compared to control animals, specifically showing symptoms of anhedonia and impaired social behavior. On the molecular level we observed a decrease in CB1R and FAAH mRNA expression in the mPFC of adult ELS exposed animals. These gene expression changes were accompanied by reduced global histone 3 acetylation in the mPFC, while no significant changes in DNA methylation and no significant changes of histone-acetylation at the promoter regions of the analyzed genes were detected. Taken together, our data provide evidence that ELS induces a long-term reduction of CB1R and FAAH expression in the mPFC of adult male rats, which may partially contribute to the ELS-induced changes in adult socio-emotional behavior.

Self-Attitude Parameters as Predictors of Psychological Well-Being in Students with Limited Health Capacities.

Psychological well-being is a system of optimal psychological qualities and states manifested as life strategy and a system of personal attitude to the world and oneself. Self-attitude is an intrapersonal phenomenon of individual projections in the field of self-awareness. In assessing psychological well-being, it acts as a guiding vector for self-development and self-actualization. In case of people with disabilities, psychological well-being largely depends on self-attitude as a predictor. This study featured the effect of self-attitude on psychological well-being in university students with limited health capacities. The study involved 60 students aged 18–25. The list of methodological tools involved Sentence Completion (J. M. Sacks, S. Levy), Subjective Well-Being Scale (adapted by M. V. Sokolova), and Personal Self-Attitude (V. V. Stolin, S. R. Pantileev). The study established differences in the assessment of psychological well-being by students with and without disabilities. Physically challenged students tended to demonstrate low self-esteem, associated with negative emotional and health experience. They also had specific parameters of self-attitude with a vector of positivity and trends towards personal growth. These parameters are a motivating component of social behavior that determines the general perception of psychological well-being by students with disabilities.

Dual Social Responsibility: The Pathway Effects and Mechanisms of Benevolent and Malevolent Actions on Firm Performance

ABSTRACTWhile doing good things, enterprises may also be subject to subjective or unintentional behaviors of doing bad things, and corporate performance is comprehensively affected by its dual social responsibility. Using data from A‐share listed companies from 2010 to 2020, this paper, grounded in signaling theory, legitimacy theory, and stakeholder theory, analyzes the dual‐path effects, comprehensive effects, and boundary effects of corporate social responsibility (CSR) and corporate social irresponsibility (CSIR) on corporate performance. It innovatively introduces innovation efficiency as a mediating variable to examine its transmission mechanism and pathways in the influence of dual social responsibility on corporate performance. The study finds that CSR and CSIR have independent and heterogeneous effects on corporate performance, with the former exhibiting an inverted U‐shaped relationship with corporate performance and the latter consistently exerting a negative impact. The coexistence and interaction of CSR and CSIR have a comprehensive effect on corporate performance, where CSR performance can mitigate the negative impact of CSIR, and there exists a threshold effect. CSR has a nonlinear impact on innovation efficiency, and innovation efficiency plays a significant mediating role in the process of CSR and CSIR affecting corporate performance. The industrial environment competition plays a moderating role in the relationship between a company's dual social behavior and its performance. The higher the industrial environment competition, the more it will accelerate and intensify the negative impact of CSIR on corporate performance. Additionally, it will steepen the inverted U‐shaped curve of CSR influencing corporate performance and shift the inflection point to the left. This study not only extends the boundaries of research on the impact of CSIR on corporate performance but also provides insights for corporate social responsibility governance and ethical decision‐making in business.

Intranasal Oxytocin Combined with Social Skills Training for Schizophrenia: an add-on Randomized Controlled Trial

Abstract Some but not other studies on oxytocin for schizophrenia, particularly those using a higher dose, indicate that oxytocin improves negative symptoms of schizophrenia. We performed an add-on randomized controlled trial to examine the effect of high dose oxytocin, social skills training, and their combination in the treatment of negative symptoms and social dysfunction in schizophrenia. Fifty-one subjects with schizophrenia were randomized, employing a two-by-two design: intranasal oxytocin (24 IU X3/day) or placebo, and social skills training or supportive psychotherapy, for three weeks. The primary outcome was the difference in the total score from baseline to end-of-study of a semi-structured interview which assessed patients’ social interactions in three scenarios: sharing a positive experience, sharing a conflict, and giving support when the experimenter shared a conflict. The interactions were scored using the Coding Interactive Behavior Manual (CIB), clinical symptoms were assessed with the PANSS. No significant difference was found between groups in the total CIB or PANSS scores. The majority of comparisons in the different social interactions between oxytocin and placebo, and between social skills training vs. supportive psychotherapy, were also non-significant. Social skills training reduced blunted affect and gaze. In post-hoc analyses of the support interaction, oxytocin improved synchrony and decreased tension, while in the positive interaction it improved positive affect and avoidance. None of these findings remained significant when controlling for multiple comparisons. In conclusion, oxytocin did not influence participants’ social behavior, and was not effective in improving the symptoms of schizophrenia.

TABARRUJ: SAYYID QUTHB'S PERSPECTIVE IN TAFSIR FI ZHILAL AL-QUR’AN

This study focuses on the concept of Tabarruj as interpreted by Sayyid Quthb in his Tafsir fi Zhilal al-Qur’an. The research explores the essence, existence, and impact of Tabarruj from Quthb's perspective, offering an in-depth analysis of how this concept is related to faith, social behavior, and gender roles in Islam. The essence of Tabarruj is linked to the weakening of faith and human morality, influenced by destructive social environments, and the fading of one's spiritual essence. Its existence manifests in specific behaviors, particularly among women, such as leaving the house without necessity, excessive social interaction with men, flirtatious behavior, and immodest dress. The study identifies significant impacts of Tabarruj, including the rise of social ills, the erosion of women's dignity, and the diminishing blessings of Allah in human life. The research contributes to the scholarly understanding of Islamic teachings on modesty, faith, and gender by examining Quthb’s interpretation of Tabarruj and its relevance to contemporary issues. Future research could compare Quthb’s views on Tabarruj with modern interpretations of modesty across different cultural and historical contexts, as well as examine the influence of digital and social media on the concept of Tabarruj among younger generations in Muslim societies.

Identifying Social-Cognitive Factors Influencing Aggression in Adolescents: A Cross-Sectional Indian Study

Adolescence is a critical period during which the likelihood of experiencing self-regulation failures like aggressive outbursts is increased. Recent Indian studies on adolescents have reported an increasing incidence of aggressive acts during this time of transition, which is a threat to the adolescent, the victim and society in general. This study focuses on the social-cognitive perspective, implying that aggression is a social behaviour that is largely affected by one’s beliefs about the acceptability of aggression and the degree of cognitive and effortful control they have over their emotions. Such beliefs are likely to be influenced by emotion socialisation, wherein parents and peers act as key agents. With this perspective, the current study, through a mediational model, explains the social-cognitive factors predicting aggressive behaviour in adolescents. This is a cross-sectional, descriptive study carried out on a sample of 475 adolescent students from the Delhi-NCR region recruited through purposive sampling. The data were collected through self-report questionnaires from schools and colleges. The model was tested using SPSS AMOS and was found to be a good fit for the data. The findings of this study are crucial from a risk and intervention perspective. It emphasises the need to build socially and emotionally competent students who not only have the skills needed to succeed but also nurture healthy social relationships and maintain positive mental health through adaptive emotion regulation skills.

State of Reciprocity: The “Looping Effect” in the Circular Production of Colonial Knowledge, Social Customs, and Tax Policy in Nineteenth- and Twentieth-Century Indonesia

Abstract This article traces Hacking's “looping effect” in colonial policies and practices of taxation, coerced labour, and governance in Indonesia. It argues that knowledge production for the purpose of taxation was a two-way, interactive process which was in particular influenced by complexes of local indigenous social organization, institutions, mentalities, and behaviour as expressed through adat (Indonesian systems of political-social norms and customary law). Such patterns and systems, the article reveals, were internalized into and started working reciprocally with colonial policy, knowledge production, and administrative practices. Taxation made up and changed people, but underlying strategies to categorize and “make known” subjects were also recognized and actively used, evaded, or influenced by these subjects and by local intermediaries. Consequently, colonial knowledge created an institutional framework that reoriented the self-perception of these subjects and intermediaries, which then changed and reconditioned popular responses to the colonial state. Systems of colonial knowledge were thus modified to eventually fit the realities they were supposed to describe, influence, and legitimize, creating a looping effect between colonial, “made up,” and actual social realities.

Feasibility and Acceptability of a Self-Guided Digital Family Skills Management Intervention for Children Newly Diagnosed With Type 1 Diabetes: Pilot Randomized Controlled Trial.

Family dynamics play an important role in determining the glycemic outcomes of type 1 diabetes (T1D) in children. The time interval immediately following T1D diagnosis is particularly stressful for families, and interventions to support families in adjusting their family practices to support adjustment to and management of T1D in the months following diagnosis may improve glycemic outcomes. Self-guided digital interventions offer a sustainable model for interventions to support caregivers in learning evidence-based family management skills for adjustment to and management of T1D. We hypothesized that a self-guided, web-based, family skills management program (addressing caregiver social support as well as family problem-solving, communication, and supportive behavior change strategies) initiated at the time of T1D diagnosis would improve glycemic outcomes in children with T1D. In this study, we report on the feasibility and acceptability of this program. We prospectively evaluated a sample of 37 children newly diagnosed with T1D recruited from a pediatric endocrinology clinic. Parent participants were asked to complete web-based modules addressing social support, family problem-solving, communication, and supportive behavior change strategies. Module completion was analyzed for percentage completion, patterns of completion, and differences in completion rates by coparenting status. Qualitative open-ended feedback was collected at the completion of each module. A total of 31 (84%) of the 37 participants initiated the web-based program. Of those 31 participants, 25 (81%) completed some content and 15 (48%) completed all 5 modules. Completion rates were higher when coparenting partners engaged in the intervention together (P=.04). Of the 18 participants given a choice about the spacing of content delivery, 15 (83%) chose to have all sessions delivered at once and 3 (17%) chose to space sessions out at 2-week intervals. Qualitative feedback supported the acceptability of the program for delivery soon after T1D diagnosis. Families reported on positive benefits, including requesting future access to the program and describing helpful changes in personal or family processes for managing T1D. In this study, we found that a self-guided digital family support intervention initiated at the time of a child's T1D diagnosis was largely feasible and acceptable. Overall, rates of participation and module completion were similar to or higher than other self-guided digital prevention interventions for mental and physical health outcomes. Self-guided digital programs addressing family management skills may help prevent challenges common with T1D management and can decrease cost, increase access, and add flexibility compared to traditional interventions. ClinicalTrials.gov NCT03720912; https://clinicaltrials.gov/study/NCT03720912.

Duets convey information about pair and individual identities in a Neotropical bird

Abstract Vocal individuality is essential for social discrimination but has been poorly studied in animals that produce communal signals (duets or choruses). Song overlapping and temporal coordination make the assessment of individuality in communal signals more complex. Additionally, selection may favor the accurate identification of pairs over individuals by receivers in year-round territorial species with duetting and long-term pair bonding. Here, we studied pair and individual vocal signatures in the polyphonal duets of rufous horneros Furnarius rufus, a Neotropical bird known for its long-term pair bonds. Hornero partners engage in duets to deter territorial intruders and protect their partnership year-round, and can discern duets from neighbors versus strangers. Using a dataset of 471 duets from 43 pairs in two populations, we measured fine-scale acoustic features across different duet levels (e.g., complete duets to non-overlapping syllable parts) and analysis levels (pair or individual). Permuted linear discriminant function analyses classified pairs and individuals more accurately than expected by chance (means: 45% and 47% versus 4 and 2%). Pair identity explained more variance in the multivariate acoustic features of duets than individual or population identities. The initial frequency of the duet showed strong potential for encoding pair identity. The acoustic traits contributing most to individual vocal signatures varied between sexes, which might facilitate the simultaneous assessment of duetters’ identities by receivers. Our study indicates that vocal individuality may exist even in species with intricate and innate communal signals and elucidates the mechanisms employed by horneros in their social discrimination ability.

Epistemic tensions in R&D alliances and the role of inter-organizational management controls

Abstract Access to heterogeneous knowledge resources is suggested in the literature as an important explanation of firm innovation and performance. The exchange of knowledge, however, can be a complex managerial challenge, especially between different epistemic communities. Our research focuses on the concept of epistemic communities to illuminate the complexity of tensions that arise in heterogeneous knowledge exchange in alliances, thus filling a gap in the literature. Using the Straussian grounded theory case study approach, our research investigates the emergence of horizontal, vertical, and inter-organizational epistemic tensions and explores management controls as instruments to guide the knowledge exchange in intermediary-driven research and development alliances. We find that the source of multiple epistemic tensions is rooted in the natural social behaviors of epistemic community members and further shows how these behaviors influence the effective use of inter-organizational management controls in facilitating heterogeneous knowledge exchange.

An Interpersonal and Meta-analytic Approach to Parenting Behaviors and Adolescent Sleep.

Two dimensions of parenting behaviors-affiliative/non-affiliative and autonomy/control- are each consistently linked to adolescent sleep health. Parenting behaviors that facilitate good sleep likely involve affiliation (i.e., warmth) and some degree of parental guidance and appropriate autonomy-granting to the adolescent; however, these domains are often confounded in parenting assessments, which limits understanding and specificity of recommendations for providers and families on how to optimize adolescents' sleep. Thus, we categorized existing literature according to an interpersonal developmental framework to identify parenting behaviors most strongly linked to adolescent sleep health. Studies (k = 42) included 43,293 participants (M age = 14.84, SD age = 2.04). Structural analysis of social behavior (SASB)interpersonal coding was applied to define and operationalize parenting behaviors (independent variables). Dependent variables included measures of sleep health (i.e.,sleep regularity, duration, efficiency, latency, timing, quality, alertness/sleepiness) and sleep disturbance. The final effect size of interest for analysis was a correlation coefficient r. Optimal parenting behaviors (e.g., warm, autonomy-granting, moderately controlling) were associated with longer sleep duration, earlier bedtime, less daytime sleepiness, shorter sleep latency, and fewer sleep disturbances. Suboptimal parenting behaviors (e.g., hostile, controlling) were associated with more daytime sleepiness and more sleep disturbances. This is one of the first studies to specify that, when paired with affiliation, both moderate control and moderate autonomy-granting were associated with better adolescent sleep health. Findings indicate that the importance of parental interpersonal warmth extends into adolescence and further suggest that the interpersonal security necessary for good sleep includes appropriate use of control and autonomy-granting behaviors.

Image of Social World in Metaphors and Narratives of Adults

The image of the social world is a predictor of social behavior and its development during stable social transitivity, i.e., COVID-19 pandemic, economic crises, local military conflicts, etc. It can also be interpreted as a variable linguistic phenomenon. However, very little empirical research has featured its integral structural and content characteristics through the prism of narratives, metaphors, and social representations. The author used the methods of thematic narrative analysis and content analysis of metaphors to identify the narrative constructions used by adult subjects to describe their image of the social world. The data obtained were subjected to frequency analysis and hierarchical cluster analysis. The experiment involved 193 respondents aged 35–49 years old, employed in the city of Rostov-on-Don, Russia. In their metaphors and narratives, they described the social world as balancing between stability and dynamism, predictability and stochasticity, as well as endowed it with differentiation in the absence of universal laws. The rationality of the metaphors reflected the age identity while the subject of biographical narratives reflected the subjective adaptation to current social processes.

Calculating Relatedness: A Pedigree of Definitions.

Biology can be viewed from both an organismal and a genic perspective. A good example is W.D. Hamilton's work on inclusive fitness and kin selection, which puts relatedness at the heart of our understanding of social behavior. Relatedness mediates how much an actor should value a specific behavior's effect on a relative compared to the cost incurred to itself. Despite its key explanatory role, relatedness is also a concept marred with misunderstanding. Part of the problem has been that the term has been used in different ways by different people. To help address this, we survey the history of how relatedness has been formally modeled, paying particular attention to how it is conceptualized from both a gene-centric and an organism-centric point of view.