Social Dominance Research Articles

Aggression in online gaming: the role of online disinhibition, social dominance orientation, moral disengagement and gender traits among Chinese university students

IntroductionAggressive behaviors in the online gaming world are frequent and have far-reaching negative effects.MethodTo explore the factors and mechanisms of aggressive in games, we surveyed 945 university students using a framework of social dominance orientation, online disinhibition, moral disengagement, and aggression in gaming, and examined the moderating role of gender traits.ResultsWe found no direct relationship between online disinhibition and aggression in gaming; however, through the mediating role of moral disengagement, online disinhibition indirectly affected aggression in gaming behavior and enhanced social dominance orientation. Social dominance orientation predicted both moral disengagement and aggression in gaming behaviors, and the mediating effect of moral disengagement was confirmed through the indirect influence of moral disengagement on aggression in gaming behavior. Moreover, the moral disengagement mechanism significantly predicted aggression in gaming behavior. Furthermore, femininity and androgyny moderated both social dominance orientation toward moral disengagement and aggression in gaming, while masculinity and androgyny moderated the path from online disinhibition to social dominance orientation. Regarding the path from moral disengagement to aggression, all gender trait moderations were significant.DiscussionThis study reveals the role of the moral disengagement mechanism in the process of game-related aggression, providing theoretical support for the explanation of aggressive behavior, which applies to players of any gender. Moreover, this study confirms the moderating role of gender. Unlike biological sex, gender traits are malleable; androgynous traits offer greater adaptability in various environments. Thus, prevention and intervention efforts against online aggression should include strengthening moral education and properly guiding and fostering androgynous gender traits.

A multi-paradigm approach to characterize dominance behaviors in CD1 and C57BL6 male mice.

Social status and dominance are critical factors influencing well-being and survival across multiple species. However, dominance behaviors vary widely across species, from elaborate feather displays in birds to aggression in chimps. To effectively study dominance, it is essential to clearly define and reliably measure dominance behaviors. In laboratory settings, C57BL/6 mice are commonly used to study dominance due to their stable and linear social hierarchies. However, other mouse strains are also used for laboratory research. Despite substantial evidence for strain effects on behavioral repertoires, the impact of strain on dominance in mice remains largely unstudied. To address this gap, we compared dominance behaviors between CD1 and C57BL/6 male mice across four assays: observation of agonistic behaviors, urine marking, tube test, and a reward competition. We found that CD1 mice demonstrate increased fighting, increased territorial marking through urination, and increased pushing and resisting in the tube test. We used unsupervised machine learning and pose estimation data from the reward competitions to uncover behavioral differences across strains and across rank differences between competing pairs. Of the four assays, urine marking and agonistic behaviors showed the strongest correlation with dominance in both strains. Most notably, we found that CD1 dominance rankings based on the tube test negatively correlated with rankings from all three other assays, suggesting that the tube test may measure a different behavior in CD1 mice. Our results highlight that behaviors can be strain-specific in mice and studies that measure social rank should consider assays carefully to promote reproducibility.Significance Statement Recent studies have highlighted that social dominance can significantly impact behavior and the brain. As such, accurately measuring dominance behavior in laboratory settings is crucial in neuroscience research. In this study, we investigated the consistency of four dominance assays for male mice across two common mouse strains. We find that not all assays result in the same dominance rankings and dominance behaviors differ across strains. Our study sheds light on the importance of considering strains for assay selection, rigor, and reproducibility.

<p>Epistemologies of Ignorance: Revisiting the Marley Hypothesis and the Role of Collective Self-Esteem and Social Dominance Theory</p>

Background: In studies on racial differences in the perception of racism, it has been shown that these differences are mediated by the degree of historical knowledge about racism. The validity of this hypothesis is evaluated in the context of the states of Oregon and Washington. In the present study, we propose as the main objective to contrast the Marley hypothesis based on its previous empirical evaluation, as it has been substantiated, and incorporating the analysis of the construct of social dominance orientation (SDO). Methodology: Using convenience sampling, 79 White Americans (M = 35.75, SD = 16.45) and 58 Black Americans (M = 30.93, SD = 10.27) were selected. Four measures were used: a historical knowledge quiz, the Collective Self-Esteem Scale, a perception of racism scale and the SDO-7 Short Scale. Results: The expected racial differences in the perception of racism were not found. However, White participants presented less historical knowledge. Furthermore, greater historical knowledge predicted SDO only for Black participants. It has been proven that the degree of racial identification moderates the effect of race status on perceptions of racism. Discussion and Conclusion: The defense of a “non-racist” self-image by white participants is closely linked to how they report their perceptions of racism. It is noted that, even though the two groups presented equal levels in this variable, the scores could be due to different underlying processes, hence the results are compatible with the notion that the two groups understand racism in different ways. The data suggests that in this region, the perception and understanding of racism are influenced by sociocultural factors that were not as relevant in previous studies.

Chronic high-dose testosterone disrupts social cognition and enhances social dominance in male long-Evans rats

While increased aggression is the most consistent behavioral effect of anabolic androgenic steroid (AAS) abuse, its cause remains unclear. AAS may promote aggression by disrupting social behaviors which maintain dominance hierarchies. To model AAS abuse, we treated male rats with chronic high-dose testosterone and tested social recognition, social learning, and competitive and aggressive dominance. Rats received daily injections s.c. of testosterone (7.5 mg/kg) or vehicle (n = 8/group). We tested social recognition by measuring investigation of a novel or familiar stimulus animal, social learning with the social transmission of food preference (STFP) test, aggressive dominance with the tube test, and competitive dominance with a food competition task. For social recognition, testosterone-treated rats did not prefer the novel stimulus rat (72.8 ± 9.3 s) over the familiar rat (68.8 ± 8.0 s, N.S.) rat. In the STFP test, testosterone-treated rats did not show a significant preference for the demonstrated flavor (59.9 ± 9.4 %, N.S.) compared with controls (70.1 ± 5.4 %, p < 0.05). In the tube test, testosterone did not increase the number of rounds won. However, when the testosterone-treated rat won, they were more likely to be lighter than their vehicle-treated opponent, χ2(1,N = 63) = 6.56, p < 0.05, Φ2 = 0.32. In the food competition task, testosterone-treated subjects won more often (48 rounds) than their vehicle-treated partners (15 rounds; p < 0.05). These results suggest that AAS disrupt recognizing and learning from the social hierarchy and increase the likelihood of challenging it. Collectively, these behavioral changes may contribute to AAS-induced aggression.

Associations between teachers’ beliefs and their perception of hate speech in school: a study in Germany and Switzerland

Hate speech is a global issue that is also prevalent among adolescents and requires an educational response. Teachers handle hate speech as part of their professional role. To date, we know little about their beliefs in relation to the early stages of their interventional actions, specifically to their perception of hate speech in school. Thus, this study examined associations between teachers’ social dominance orientation, their pluralist attitude, and their hate speech perception in school. A sample of 471 secondary school teachers from 38 schools (Germany: n = 251; Switzerland: n = 220) participated in a self-report survey from December 2020 to April 2021 (MAge = 42.8 years; 57.7% females; 21.0% with migration status). Data from a total of 3,560 students from grades 7–9 (Germany: n = 1,841; Switzerland: n = 1,719) were matched with teachers’ data to control for students’ hate speech perception in school. Fixed effects multilevel regressions were run, including covariates (teachers’ age, gender, migration status, students’ hate speech perception), teachers’ social dominance orientation, pluralist attitude, and their hate speech perception in school. Teachers perceived a higher frequency of offline hate speech than online hate speech. Contrary to the hypotheses, social dominance orientation was positively associated with offline and online hate speech perception. As predicted, teachers’ pluralist attitude was positively linked to their off- and online hate speech perception. Further research must now clarify how the investigated beliefs and attitudes and teachers’ hate speech perception in school relate to other aspects of their professional competence.

Gender Identity and Aggression.

Gender identity, or people's deeply felt, internal sense of their gender, plays an important role in aggression perpetration and victimization. In this article, I review and organize the psychological research literatures on gender identity-based aggression. I first discuss the need to move beyond binary, cisgender understandings of gender by embracing expansive definitions that more fully capture people's experiences and identities. Next, I summarize relevant research indicating two paths from gender identity to aggression. In one path, individuals with a more masculine (i.e., dominant, agentic) gender identity use aggression proactively, motivated by pursuit of social dominance. In another path, individuals with a more uncertain (i.e., insecure, precarious) gender identity use aggression defensively-and often toward vulnerable, gender nonconforming targets-as a means of protecting their gender identity against threats. I end by identifying important areas for future research and considering how interventions might best mitigate gender identity-based aggression.

Hierarchy as a signal of culture and belonging: Exploring why egalitarian ideology predicts aversion to hierarchical organizations

Variation in people's ideological preference for the maintenance of inequality between social groups (i.e., social dominance orientation; SDO) predicts important sociopolitical outcomes, such as endorsement of different social policies, institutions, and belief systems. We argue that SDO may also inform people's engagement with work organizations. Specifically, we propose that SDO may impact attraction to different organizational structures. Across 6 experiments (N = 3034), we find that people with relatively egalitarian values are less attracted to organizations with much (vs. little) managerial hierarchy; this gap in attraction is attenuated for relative anti-egalitarians (Studies 1a-b). These effects are not moderated by whether dominant vs. subordinate group members occupy positions of power in hierarchical arrangements (Study 2a-b) and are driven by signals concerning likelihood of organizational belonging that egalitarians (vs. anti-egalitarians) derive from managerial hierarchy (Studies 3a-b). We discuss implications for social dominance theory and research connecting ideology to organizational attraction.

Do physicians and patients speak different languages: quantitative evidence from linguistic analysis

Abstract Background Misunderstanding and miscommunication between physicians and patients are well-accepted sources of poor therapy adherence and poor outcomes. Some of these issues are suspected to occur because these two groups speak different "languages". A likely component of such language difference is vocabulary; specifically, the use of medical terminology. Nonetheless, there are other psychological aspects of language such as authoritative and emotional use. The text analysis programme, Linguistic Inquiry Word Count (LIWC), was used to assess such features. LIWC is an established tool that analyses the frequency of words that fall into various linguistic, psychological, and emotional categories. The aim was to compare text from both physicians and patients. The context was the use of anticoagulation therapy in patients with atrial fibrillation. Methods Three articles from English-speaking countries (Australia, Canada, and the UK) were examined. These articles presented transcribed verbal communications between interviewers and groups of physicians and patients. More than 80 separate comments, each ≥ 20 words, made by each group were extracted from the articles and analysed. The total number of words was 8,609 from physicians and 4,804 from patients. Data were collected for the following LIWC analysis categories: (1) the proportion of big words (words with ≥7 letters), (2) clout; high scores suggest that the speaker is confident, authoritative, and has a high level of social dominance. It implies that the individual is speaking from a position of strength or influence; and (3) emotion: this category is integral to understanding how people communicate feelings and emotions. Results As anticipated the number of big words was higher in physician interviews (19±1%) than for patients (12±1%; P=0.0013). The clout indicator also showed the physicians with a higher score (43±6 vs 16±6; P=0.028). In contrast, in the emotion category, patient scores (1.19±0.02) were higher than for physicians (0.58±0.15; P=0.016); primarily because of a three-fold higher negative emotion score (0.53±0.08 vs 0.16±0.11; P=0.048). Conclusions Physicians and patients used language differently. As expected, vocabulary differed; physicians used more big words. This is consistent with greater use of medical terminology, a known source of miscommunication. The higher physician clout score indicates the potential for a power imbalance. The greater use of emotion-related words by patients is consistent with their anxiety and concern. Human judgment and contextual analysis are required to fully understand and address the nuances of communication and associated understanding. Nevertheless, LIWC can play a supportive role. If we identify language patterns likely to result in miscommunication or misunderstanding, steps can be taken to mitigate the effects. LIWC provided quantitative insight into qualitative impressions and revealed subtle, but potentially vital, differences.

Mice lacking acid-sensing ion channel 2 in the medial prefrontal cortex exhibit social dominance.

Social dominance is essential for maintaining a stable society and has both positive and negative impacts on social animals, including humans. However, the regulatory mechanisms governing social dominance, as well as the crucial regulators and biomarkers involved, remain poorly understood. We discover that mice lacking acid-sensing ion channel 2 (ASIC2) exhibit persistently higher social dominance than their wild-type cagemates. Conversely, overexpression of ASIC2 in the medial prefrontal cortex reverses the dominance hierarchy observed in ASIC2 knockout (Asic2-/-) mice. Asic2-/- neurons exhibit increased synaptic transmission and plasticity, potentially mediated by protein kinase A signaling pathway. Furthermore, ASIC2 plays distinct functional roles in excitatory and inhibitory neurons, thereby modulating the balance of neuronal activities underlying social dominance behaviors-a phenomenon suggestive of a cell subtype-specific mechanism. This research lays the groundwork for understanding the mechanisms of social dominance, offering potential insights for managing social disorders, such as depression and anxiety.

What she believes or what she says? The relation between maternal SDO, RWA, mental state talk, and children’s theory of mind

The present study provided a novel examination of how children’s theory of mind (ToM) might be related to two maternal beliefs: (1) social dominance orientation (SDO: the belief that inequalities in society are justified) and (2) right-wing authoritarianism (RWA: a belief in following established authorities). We reasoned that these beliefs could affect maternal talk in that mothers with high SDO and RWA would be less likely to use mental state (MS) talk to explore peoples’ desires and feelings, particularly when talking about individuals of an outgroup (e.g., of a different ethnicity). As a consequence, there might be links between maternal beliefs and children’s ToM. We measured SDO and RWA in mothers, gave children theory-of-mind tasks, and measured the MS talk of 79 New Zealand mothers when asked to describe pictures to their 2- to 5-year-olds. Mothers with high SDO and RWA provided less MS talk when describing individuals of a different ethnicity, and mothers with high SDO and RWA had children with a worse ToM. The present findings provide unique information regarding the role of parent beliefs in children’s ToM.

Perceptions of women’s leadership in urban governance in the communes of greater Lomé, Togo

Perceptions of women’s roles and leadership in urban governance vary from country to country and culture to culture. While women are represented and participate fully in political decision-making in some countries, in Togo women’s participation in local governance is still limited. The aim of this research is to analyse perceptions of women’s leadership in urban governance in the communes of greater Lomé. Specifically, the study of the influence of general perceptions of the role of women on the development of their leadership in the urban governance of greater Lomé (i) and the implications of these perceptions on the participation of women in the urban governance of greater Lomé (ii). Semi-structured interviews were conducted in all the town halls of the thirteen greater Lomé autonomous district communes with 222 women and 162 men, i.e., a total of 384 people. The corpus created from the interviews, which were transcribed in their entirety, was analyzed using the theory of social dominance developed by Sidanius and Pratto to explain power relations and inequalities between social groups. The results show that perceptions of women’s participation in urban governance vary and are generally associated with several significant implications. The general perception is that women are not as competent or legitimate as men in political and administrative leadership roles. However, there is a growing recognition of the value of gender diversity in urban governance, with a growing awareness of the importance of including women in decision-making processes. From the point of view of the significant implications of perceptions, positive perceptions favor increased representation of women, innovation, and creativity, strengthening legitimacy, reducing inequalities, and presenting women as positive role models in urban governance.

Association between victimization and perpetration of cyberhate: The moderating role of social dominance orientation.

Expressions of cyberhate motivated by characteristics such as gender, ethnicity, and religious beliefs are now present and prevalent on social networks. Past research, both in online and offline contexts, has identified that, although there may be an overlap between victims and perpetrators of violence; this is not always the case. Nevertheless, the number of studies focused on variables that moderate the relation between victimization and perpetration is still low. The current study aims at analyzing the relation between cyberhate victimization and perpetration and the potential moderating role of social dominance on this relation. During the 2019/2020 school year in Andalusia, Spain, a prospective longitudinal study was implemented. The study used a representative sample of 1498 adolescents enrolled in compulsory secondary education in the first wave (51.8% female; Mage = 13.58) and 1195 adolescents in the second wave (53.2% female; Mage = 14.04). Surveys administrated to adolescents were used for data collection. The findings revealed a positive correlation between cyberhate victimization and perpetration. They supported the notion that social dominance not only predicted the perpetration of cyberhate several months later, but also its moderating effect on the relation between cyberhate victimization and perpetration. Cyberhate victims who reported higher levels of social dominance were more likely to become perpetrators several months later. Results suggest the need to implement preventive programs considering the influence of social dominance. These strategies could promote social equality and help to interrupt the cycle in which victims can become perpetrators of cyberhate.

Sex and Dominance Differences in the Relationship Between Childhood Trauma and Prosocial Behavior: The Roles of Meaning in Life and Resilience.

The impact of childhood trauma on adolescents' development is a key topic in social science. Much of the existing literature focuses on its negative consequences, with limited study on its effects on positive social functions, particularly prosocial behavior. This study aims to uncover the link between childhood trauma and prosocial behavior among Chinese adolescents, focusing on how meaning in life and resilience mediate this relationship and how sex and social dominance goals moderate these effects. This study utilized random cluster sampling to survey 659 adolescents (mean age = 15.05, SD = 1.576, 53.6% female) in Huai'an City, Jiangsu Province, China. Data on childhood trauma, meaning in life, resilience, and prosocial behavior were collected through self-reported measures. The data were analyzed through Process Macro Model 4 for mediation effects and Model 8 for moderated mediation in SPSS 26.0. Findings indicated that meaning in life (β = -.042, P < .001, SE = 0.015) and resilience (β = -.071, P < .001, SE = 0.018) partially mediate the impact of the main effect. Social dominance goals reduced the negative effects of trauma on prosocial behavior; higher levels lead to reduced impacts (β = -.173, P < .001, SE = 0.039, t = -4.448). Sex differences also moderated the effect of trauma on meaning in life, with females experiencing a greater decrease in the meaning of life after adversity (β = -.825, P < .001, SE = 0.112, t = -7.372). This research offers new insights into the mechanisms by which childhood trauma affects prosocial behavior and emphasizes the need to consider sex and social dominance goals in trauma interventions.

Russians’ Attitudes Towards the War in Ukraine

ABSTRACTThe Russian invasion of Ukraine has caused considerable military casualties on both sides and widespread harm to Ukrainian civilians. While polls suggest that a slim majority of Russians endorse the invasion, the factors underpinning this support remain uncertain. We investigated factors associated with support for the war among Russians. In three large, diverse, samples of Russian adults (total N = 2856), we extend the dual process motivational model to the context of international warfare, focusing on two key ideologies: right‐wing authoritarianism (RWA) and social dominance orientation (SDO). Consistent with polling data, we find that approximately half of the participants support the war. Across studies, RWA, especially its submission facet, emerges as a strong and consistent predictor of increased support for the war in Ukraine. In contrast, the associations with SDO are weaker and more inconsistent, with anti‐egalitarianism playing only a minor role in opposing peace efforts. Additionally, factors such as Russian identification, nationalism, group efficacy, war‐related misperceptions and collective narcissism also contribute to war support. Our findings suggest that Russian support for the war may reflect broader support for the existing regime with backing for the military intervention serving as a demonstration of loyalty to Vladimir Putin and his government.

Socially induced plasticity of the posterior tuberculum and motor behavior in zebrafish (Danio rerio).

Social dominance is prevalent throughout the animal kingdom. It facilitates the stabilization of social relationships and allows animals to divide resources according to social rank. Zebrafish form stable dominance relationships that consist of dominants and subordinates. Although social-status-dependent differences in behavior must arise due to neural plasticity, mechanisms of how neural circuits are reconfigured to cope with social dominance are poorly described. Here, we describe how the posterior tuberculum nucleus (PT), which integrates sensory social information to modulate spinal motor circuits, is morphologically and functionally influenced by social status. We combined non-invasive behavioral monitoring of motor activity (startle escape and swim) and histological approaches to investigate how social dominance affects the morphological structure, axosomatic synaptic connectivity, and functional activity of the PT in relation to changes in motor behavior. We show that dopaminergic cell number significantly increases in dominants compared to subordinates, while PT synaptic interconnectivity, demonstrated with PSD-95 expression, is higher in subordinates compared to dominants. Secondly, these socially induced morphological differences emerge after one week of dominance formation and correlate with differences in cellular activities illustrated with higher phosphor-S6 ribosomal protein expression in dominants compared to subordinates. Thirdly, these morphological differences are reversible as the social environment evolves and correlates with adaptations in startle escape and swim behaviors. Our results provide new insights of the neural bases of social behavior that may be applicable to other social species with similar structural and functional organization.

Socioeconomic status self‐deception as a way to perpetuate classist societies

AbstractSocioeconomic status self‐deception refers to the motivated tendency to perceive oneself as having a higher subjective status than would correspond to objective conditions. This can be a powerful mechanism to legitimize the social order. We proposed that when people perceive the surrounding social environment to be classist, people tend to self‐deceive themselves by overestimating their socioeconomic status. This mechanism, in turn, would lead to justify the system to a higher extent and show less support for redistribution, and reduce relative deprivation and status anxiety. These hypotheses were tested across four pre‐registered studies on different high‐quality samples, different operationalization of the variables in our model, and both cross‐sectional and longitudinal observations. On the one hand, the results do not provide evidence of a link between perceiving a classist climate and socioeconomic status self‐deception. On the other hand, socioeconomic status self‐deception was confirmed to predict higher system justification, and lower support for redistribution, status anxiety and relative deprivation. The construct and operationalization of socioeconomic status self‐deception proposed in this research could help reconcile opposing predictions by system justification theory and social dominance theory, and understand why individuals low on socioeconomic status would oppose policies which could benefit them.

Chickadees sing different songs in sympatry versus allopatry.

Character displacement theory predicts that closely-related co-occurring species should diverge in relevant traits to reduce costly interspecific interactions such as competition or hybridization. While many studies document character shifts in sympatry, few provide corresponding evidence that these shifts are driven by the costs of co-occurrence. Black-capped (Poecile atricapillus) and mountain chickadees (P. gambeli) are closely-related, ecologically similar, and broadly distributed songbirds with both allopatric and sympatric populations. In sympatry, both species appear to suffer costs of their co-occurrence: 1) both species are in worse body condition compared to allopatry and 2) hybridization sometimes yields sterile offspring. Here, we explored character displacement in the songs of black-capped and mountain chickadees by characterizing variation in male songs from sympatric and allopatric populations. We found that mountain chickadees sing differently in sympatry versus allopatry. Specifically, they produced more notes per song, were more likely to include an extra introductory note, and produced a smaller glissando in their first notes compared to all other populations. Combined with previous research on social dominance and maladaptive hybridization between black-capped and mountain chickadees, we posit that differences in sympatric mountain chickadee song are population-wide shifts to reduce aggression from dominant black-capped chickadees and/or prevent maladaptive hybridization.

Adult Neurogenesis and the Initiation of Social Aggression in Male Mice.

The hippocampus is important for social behavior and exhibits unusual structural plasticity in the form of continued production of new granule neurons throughout adulthood, but it is unclear how adult neurogenesis contributes to social interactions. In the present study, we suppressed neurogenesis using a pharmacogenetic mouse model and examined social investigation and aggression in adult male mice to investigate the role of hippocampal adult-born neurons in the expression of aggressive behavior. In simultaneous choice tests with stimulus mice placed in corrals, mice with complete suppression of adult neurogenesis in adulthood (TK mice) exhibited normal social investigation behaviors, indicating that new neurons are not required for social interest, social memory, or detection of and response to social olfactory signals. However, mice with suppressed neurogenesis displayed decreased offensive and defensive aggression in a resident-intruder paradigm, and less resistance in a social dominance test, relative to neurogenesis-intact controls, when paired with weight and strain-matched (CD-1) mice. During aggression tests, TK mice were frequently attacked by the CD-1 intruder mice, which never occurred with WTs, and normal CD-1 male mice investigated TK mice less than controls when corralled in the social investigation test. Importantly, TK mice showed normal aggression toward prey (crickets) and smaller, nonaggressive (olfactory bulbectomized) C57BL/6J intruders, suggesting that mice lacking adult neurogenesis do not avoid aggressive social interactions if they are much larger than their opponent and will clearly win. Taken together, our findings show that adult hippocampal neurogenesis plays an important role in the instigation of intermale aggression, possibly by weighting a cost-benefit analysis against confrontation in cases where the outcome of the fight is not clear.

AN EXAMINATION OF SOCIAL DOMINANCE ORIENTATION OF GENERATION Z LIVING IN TURKEY ACCORDING TO DIFFERENT VARIABLES

In this study, the social dominance orientations of the generation Z were examined according to different variables (gender identity, view of socio-economic class, occupation field, identity attitudes, purposive and instrumental values). The research sample consists of 640 individuals aged between 19-25 and living in different regions of Turkey. Socio-demographic Information Form, Social Dominance Orientation Scale, Identity Attitudes Scale and Rokearch Values Inventory were applied to the participants within the scope of the research. The results of the study show that the social dominance orientations differ significantly between the gender identities. In addition, social dominance orientation differs significantly according to occupation field. There were positive or negative correlations between social dominance orientation and some of the purposive and instrumental values. In addition, social dominance orientation predicts gender identity, education, and income status assessment.

Effect of temporal water restrictions on drinking behavior and time budget in lactating dairy cows according to their position in the social hierarchy within the herd

On dairy farms, milking practices can temporarily restrict cows from accessing drinking water. This study examined how different types of temporary water restriction, similar to those commonly encountered on farms, may affect the individual behavior and physiological dehydration status of cows and whether these effects could differ according to the cow's position in the social hierarchy of the group. Four treatments were applied (CTRL = free access to the drinker and feed fence, HL = 2 h of headlock at the feed fence after morning and evening milking, D2H = free access to the feed fence and no access to water for 2 h after milking and D4H = free access to the feed fence and no access to water for 4 h after milking) to 4 groups of 10 lactating dairy cows using a 4 × 4 Latin square design. Each treatment period lasted 1 week. The cows were housed within a free-stall barn, and each group was in a pen equipped with 1 electronic drinker, 10 individual feeders, and 2 cameras. Cow social dominance hierarchies were characterized using normalized David's scores, which were calculated from video-detected replacements at each pen's drinker. During the last 4 d of each treatment period, drinking behavior was measured using interconnected drinkers, and eating, idle, and lying times were measured using accelerometers. On d 6 of each treatment period, during the morning and evening milkings, blood and then milk samples were collected to analyze bioindicators of dehydration and milk composition, respectively. The daily water intake of cows was unaffected by either social dominance or treatment type. Drinking rate and drinking bout frequency were higher during the HL, D2H, and D4H treatments than during the CTRL treatment, and drinking time was lower during the D4H treatment than during the CTRL treatment. Hourly lying time decreased at the end of the water restriction periods, i.e., at 1000 h in HL, at 1100 h in D2H, and at 1200 and 1300 h in D4H, which was not observed in CTRL, which could be interpreted as a sign of cow discomfort. For blood collected before the morning milking, hematocrit levels were lower in the D4H treatment than in the HL treatment. For blood collected before the evening milking, creatinine concentrations were lower in the D4H treatment than in the D2H treatment, with a greater difference seen for dominant cows than for subordinate cows. For both milkings, milk freezing point was higher in the HL, D2H, and D4H treatments than in the CTRL treatment, indicating dilution. In contrast to the other social categories, subordinate cows made more daily visits to the drinker during the D4H treatment than during the CTRL treatment but displayed no differences in drinking bout duration or the duration of drinking interruptions within bouts in the D2H treatment compared with the CTRL treatment. Overall, cows were able to maintain their water intake despite the temporary water restrictions when they had access to the number of drinkers recommended by animal welfare guidelines. That said, their idle and lying time appeared to be disturbed.