Children in the western world often are socialized as meat-eaters, while caring much about animals. Yet we know little about how children think about eating animals and animal products, which will have important consequences for global meat consumption. Participants (n = 479, 80% White British, 57% female; children n = 119, Mage = 10.03, SD = 0.72; young adults n = 181, Mage = 19.09, SD = 0.85; adults n = 179, Mage = 40.97, SD = 8.18) reasoned about the acceptability of eating animals and animal products. Using the framework of social domain theory, we found that that children focused on moral concerns (p <. 001, ηp2 =. 01), whereas adults referenced conventions about the natural and necessary components of eating meat. Participants across age groups reported eating animal products (e.g. milk) to be acceptable because animals were not harmed. Together these results indicate that attempts to reduce meat consumption ought to be tailored in a domain-specific manner to age groups.

Humans care for the wellbeing of some animals (e.g. dogs), yet tacitly endorse the maltreatment of others (e.g. pigs). What treatment is deemed morally appropriate for an animal can depend on whether the animal is characterised as “food”. When such categorisation of animals emerges, and when a moral hierarchy of beings depending on their species-membership (speciesism) develops is poorly understood. We investigate this development across samples of children (9-11-years-old), young adults (18-21-years-old), and adults (29-59-years-old; total N=479). Compared to young adults and adults, children a) show less speciesism, b) are less likely to categorize farm animals as food than pets, c) think farm animals ought to be treated better, and d) deem eating meat and animal products to be less morally acceptable. These findings imply that there are key age-related differences in our moral view of animal worth that point to socially constructed development over the lifespan.

Examining the forms of social and moral reasoning adolescents use is important for understanding youth engagement with public health guidelines. The present work examined adolescents' perceptions of social norms and associated reasoning in the COVID-19 context. Participants (n = 127, M age = 17.00, SD = 0.71) negatively evaluated other teenagers who broke COVID-19 guidelines and reasoned about harm reduction to justify breaking these rules, but also recognised the importance of protecting mental health as one reason to spend time with friends counter to these rules. Further, adolescents reported that they were more likely to engage in public health behaviors compared to their peers or the average teenager, suggesting a social norm of lower engagement with these guidelines. Together, this evidence documents the importance of considering social norms and moral reasoning in framing communication efforts that target adolescents' adherence to public health guidelines.

The present study examined age-related differences in bystander reactions within the context of peer exclusion of national ingroup (British) and immigrant outgroup (Australian or Turkish) peers. The immigrant peers were from nations that varied in terms of their perceived intergroup status in Britain. Participants were British children (n = 110, 8–11 years) and adolescents (n = 193, 13–16 years) who were presented with one of three scenarios in which a British national, Australian immigrant, or Turkish immigrant peer was excluded by a British peer group. Participants indicated their bystander responses. Perceived similarity and bystander self-efficacy were examined as possible correlates of bystander reactions. Findings revealed that children were more likely to directly challenge the social exclusion when the excluded peer was British or Australian compared with when they were Turkish. In contrast, adolescents did not differentiate in their response—they were equally likely to directly challenge the exclusion regardless of the excluded peer’s nationality. Importantly, when the excluded peer was Turkish, moderated mediation analysis showed that, with age, there was higher bystander self-efficacy for challenging the exclusions. In turn, higher bystander self-efficacy was related to higher direct challenging. These novel findings demonstrate the importance of intergroup relations, perceived similarity, and bystander self-efficacy in the emergence of age-related differences in bystander reactions to the exclusion of immigrant peers.

The fields of science, technology, engineering, and mathematics (STEM) are rife with inequalities and under-representation that have their roots in childhood. While researchers have focused on gender and race/ethnicity as two key dimensions of inequality, less attention has been paid to wealth. To this end, and drawing from the Social Reasoning Development approach, we examined children's and adolescents’ perceptions of STEM ability and access to opportunities as a function of wealth, as well as their desire to rectify such inequalities. Participants (n = 234: early childhood, n = 70, mean age = 6.33, SD =.79; middle childhood, n = 92, mean age = 8.90, SD =.83 and early adolescence, n = 62, mean age = 12.00; SD = 1.16) in the U.K. (64% White British) and U.S. (40% White/European American) read about two characters, one high-wealth and one low-wealth. In early childhood, participants reported that the high-wealth character would have greater STEM ability and were just as likely to invite either character to take part in a STEM opportunity. By middle childhood, participants were more likely to report equal STEM abilities for both characters and to seek to rectify inequalities by inviting the low-wealth character to take part in a STEM opportunity. However, older participants reported that peers would still prefer to invite the high-wealth character. These findings also varied by ethnic group status, with minority status participants rectifying inequalities at a younger age than majority status participants. Together these findings document that children are aware of STEM inequalities based on wealth and, with age, will increasingly seek to rectify these inequalities.

Little is known about the factors that influence engagement for adolescents participating in informal youth science programs. This study examined longitudinal reciprocal associations between adolescents' science engagement, interest, and growth mindset. Participants were adolescents (Mage = 15.06, SD = 1.82 years, 66.8% female) from the UK (n = 168) and the US (n = 299). A cross lagged path analysis indicated that participants' science growth mindset at baseline was positively related to interest, and engagement at year 1, and science interest at year 1 was positively related to growth mindset at year 2. Additionally, girls had lower science growth mindsets than boys. This evidence suggests that informal programs may encourage positive STEM trajectories by fostering engagement, growth mindset and interest.

During the COVID-19 pandemic, young people have been exposed to distressing content about COVID-19 without knowing whether they can trust such content. This indicates a need to examine the effects of social media use on mental health and well-being. Existing research provides an inconsistent impression of such effects. Thus, we examined the relation between exposure to COVID-19 information on social media and well-being and assessed if trust in COVID-19 information on social media moderated this relationship. The sample consisted of 168 adolescents and young adults from the U.K. and U.S. (Mage = 17.4 years). Participants completed measures of exposure to, and trust in, COVID-19 information on social media platforms, and measures of emotional, psychological, and social well-being. Results revealed a null to positive relation between exposure to COVID-19 information on social media and well-being across measures. However, when trust was added to the models as a moderator, results indicated that, for adolescents with higher levels of trust in COVID-19 information found on social media, the relation between information encountered on social media and well-being was positive. In contrast, for adolescents with lower levels of trust, the association between information encountered on social media and well-being was null or sometimes negative. Given the lack of consensus about the impact of social media use on well-being, these results point to the importance of trust when assessing the relationship between exposure to COVID-19 information and well-being.

Many children care about animals yet are accepting of meat consumption. This may reflect a disconnect between children's meat eating, food-systems knowledge, and their moral evaluations. A theoretical framework is proposed for understanding the developmental trajectory of this disconnection. We discuss its components and the implications for dietary interventions.

The present study examined British children's and adolescents' individual and perceived group evaluations of a challenger when a member of one's own group excludes a British national or an immigrant newcomer to the school (Turkish or Australian) from participating in a group activity. Participants included British children (n = 110, Mage in years  = 9.69, SD = 1.07, 44 girls, aged 8-11) and adolescents (n = 193, Mage in years  = 14.16, SD = 0.92, 104 girls, aged 13-16), who were inducted into their group and heard hypothetical scenarios in which a member of their own group expressed a desire to exclude the newcomer from joining their activity. Subsequently, participants heard that another member of the ingroup challenged the exclusionary act by stating that they should be inclusive. Children's and adolescents' individual evaluations of the bystander who challenged the social exclusion of an immigrant peer were more positive than their perceived group evaluations, recognizing that groups are often exclusionary. Only adolescents but not children differed in their individual and perceived group evaluations in the social exclusion of British peers. When the newcomer was an immigrant peer, adolescents were more likely to evaluate the challenger positively in both their individual and perceived group evaluations compared to children. Further, children, compared to adolescents, were more likely to reason about social and group norms to justify their evaluations only when the excluded peer was an immigrant but not when the excluded peer was British. Adolescents were more likely to reason about fairness, rights, and equality. The findings indicate that exclusionary group norms surrounding immigrants begin in childhood. Interventions that focus on changing group norms to be more inclusive could be effective in reducing prejudicial attitudes toward immigrants in childhood.

AbstractGender stereotypes are harmful for girls’ enrollment and performance in science and mathematics. So far, less is known about children’s and adolescents’ stereotypes regarding technology and engineering. In the current study, participants’ (N = 1,206, girls n = 623; 5–17-years-old, M = 8.63, SD = 2.81) gender stereotypes for each of the STEM (science, technology, engineering, and mathematics) domains were assessed along with the relation between these stereotypes and a peer selection task in a STEM context. Participants reported beliefs that boys are usually more skilled than are girls in the domains of engineering and technology; however, participants did not report gender differences in ability/performance in science and mathematics. Responses to the stereotype measures in favor of one’s in-group were greater for younger participants than older participants for both boys and girls. Perceptions that boys are usually better than girls at science were related to a greater likelihood of selecting a boy for help with a science question. These findings document the importance of domain specificity, even within STEM, in attempts to measure and challenge gender stereotypes in childhood and adolescence.

AbstractLittle research has examined the associations between perceived inclusivity within informal science learning sites, youth program belonging and perceptions of program career preparation. This study explored relations between these factors at three timepoints (T1 = start of program, T2 = 3 months and T3 = 12 months after start). Participants were a diverse sample of 209 adolescents participating in STEM youth programs within informal science learning sites situated in the United States and United Kingdom (70% females: Mage = 15.27, SDage = 1.60), with 53.1% British and 64.1% non-White. Path analysis revealed that only perceptions of inclusivity for own social identity group (i.e. gender, ethnicity) at T1 were associated with T2 STEM youth program belonging. There was a significant indirect effect of T1 perceptions of inclusivity for one’s own social identity groups on T3 perceptions of program career preparation via T2 program belonging. This study highlights that, over time, perceptions of inclusivity around youth’s own social identity groups (i.e. gender and ethnicity/culture) are related to a sense of youth program belonging, which in turn is later associated with perceptions of program career preparation.

This study explored relations between COVID-19 news source, trust in COVID-19 information source, and COVID-19 health literacy in 194 STEM-oriented adolescents and young adults from the US and the UK. Analyses suggest that adolescents use both traditional news (e.g. TV or newspapers) and social media news to acquire information about COVID-19 and have average levels of COVID-19 health literacy. Hierarchical linear regression analyses suggest that the association between traditional news media and COVID-19 health literacy depends on participants' level of trust in their government leader. For youth in both the US and the UK who used traditional media for information about COVID-19 and who have higher trust in their respective government leader (i.e. former US President Donald Trump and UK Prime Minister Boris Johnson) had lower COVID-19 health literacy. Results highlight how youth are learning about the pandemic and the importance of not only considering their information source, but also their levels of trust in their government leaders.

Women are drastically underrepresented in science, technology, engineering, and mathematics (STEM) and this underrepresentation has been linked to gender stereotypes and ability related beliefs. One way to remedy this may be to challenge male bias gender stereotypes around STEM by cultivating equitable beliefs that both female and male can excel in STEM. The present study implemented a growth mindset intervention to promote children’s incremental ability beliefs and investigate the relation between the intervention and children’s gender stereotypes in an informal science learning site. Participants (n = 143, female n = 77, male n = 66, 5–12-years-old, Mage = 8.6, SD = 1.7) were visitors to a science museum who took part in an interactive space science show. Participants who were exposed to a growth mindset intervention, compared to the participants in the control condition, reported significantly less gender stereotyping around STEM by reporting equitably in the stereotype awareness measure. Relatedly, participants in the control condition reported male bias gender stereotype in the stereotype awareness measure. Further, children between 5 and 8-years-old reported greater male bias stereotypes awareness and stereotype flexibility in space science compared to children between 9 and 12-years-old. Lastly, children demonstrated in-group bias in STEM ability. Male participants reported gender bias favoring males’ ability in stereotype flexibility and awareness measures, while female participants reported bias toward females’ ability in stereotype flexibility and awareness measures. These findings document the importance of a growth mindset intervention in buffering against STEM gender stereotyping amongst children, as well as the significant role a growth mindset intervention can play within an informal science learning site.

Interest in science and math plays an important role in encouraging STEM motivation and career aspirations. This interest decreases for girls between late childhood and adolescence. Relatedly, positive mentoring experiences with female teachers can protect girls against losing interest. The present study examines whether visitors to informal science learning sites (ISLS; science centers, zoos, and aquariums) differ in their expressed science and math interest, as well as their science and math stereotypes following an interaction with either a male or female educator. Participants (n = 364; early childhood, n = 151, M age = 6.73; late childhood, n = 136, M age = 10.01; adolescence, n = 59, M age = 13.92) were visitors to one of four ISLS in the United States and United Kingdom. Following an interaction with a male or female educator, they reported their math and science interest and responded to math and science gender stereotype measures. Female participants reported greater interest in math following an interaction with a female educator, compared to when they interacted with a male educator. In turn, female participants who interacted with a female educator were less likely to report male-biased math gender stereotypes. Self-reported science interest did not differ as a function of educator gender. Together these findings suggest that, when aiming to encourage STEM interest and challenge gender stereotypes in informal settings, we must consider the importance of the gender of educators and learners.

Adolescence represents a developmental period of waning academic motivation, particularly in STEM domains. To combat this, better understanding the factors that might foster STEM motivation and interest is of importance. Social factors like social competencies and feelings of belonging become increasingly important in adolescence. The current study investigated structural relations between social competencies, feelings of belonging to an informal STEM learning program, math and science efficacy and interest in a sample of 268 adolescents (Mage = 15.25; 66.8% girls; 42.5% White British or European American, 25.7% South Asian British or Asian American, 15.7% Afro-Caribbean Black British or African American 5.6% Bi-racial, and 3.0% other). Adolescents were recruited from six different informal learning sites (e.g. science museums, zoos, or aquariums) in the United States (n = 147) and the United Kingdom (n = 121). The results revealed positive relations between social competencies and belonging, and between belonging and math and science efficacy and interest. Further, the results also indicated a positive indirect effect of social competencies on efficacy and interest, via belonging. These findings have implications for guiding informal STEM programming in ways that can enhance STEM motivation and interest.

Informal science learning sites (ISLS) create opportunities for children to learn about science outside of the classroom. This study analyzed children's learning behaviors in ISLS using video recordings of family visits to a zoo, children's museum, or aquarium. Furthermore, parent behaviors, features of the exhibits and the presence of an educator were also examined in relation to children's behaviors. Participants included 63 children (60.3% female) and 44 parents in 31 family groups. Results showed that parents' science questions and explanations were positively related to children observing the exhibit. Parents' science explanations were also negatively related to children's science explanations. Furthermore, children were more likely to provide science explanations when the exhibit was not interactive. Lastly there were no differences in children's behaviors based on whether an educator was present at the exhibit. This study provides further evidence that children's interactions with others and their environment are important for children's learning behaviors.

This study explored topic interest, perceived learning and actual recall of exhibit content in 979 children and adolescents and 1,184 adults who visited informal science learning sites and interacted with an adult or youth educator or just the exhibit itself as part of family visits to the sites. Children in early childhood reported greater topic interest and perceived learning, but actually recalled less content, than participants in middle childhood or adolescence. Youth visitors reported greater interest after interacting with a youth educator than just the exhibit, and perceived that they learn more if they interact with an educator (youth or adult). Participants in middle childhood recall more when they encounter a youth educator. Adult visitors reported greater interest after interaction with a youth educator than with the exhibit alone or an adult educator. They also perceived that they learn more if they interact with an educator (youth or adult) than just the exhibit and perceived that they learned more if they interacted with a youth educator than an adult educator. Results highlight the benefits of educators in informal science learning sites and document the importance of attention to developmental needs.

Developmental science research often involves research questions developed by academic teams, which are tested within community or educational settings. In this piece, we outline the importance of research-practice partnerships, which involve both research and practice-based partners collaborating at each stage of the research process. We articulate challenges and benefits of these partnerships for developmental science research, identify relevant research frameworks that may inform these partnerships, and provide an example of an ongoing research-practice partnership.

The present study examined how peer group norms influence children's evaluations of deviant ingroup members. Following the manipulation of competitive or cooperative norms, participants (children, Mage = 8.69; adolescents, Mage = 13.81; adults, Mage = 20.89; n = 263) evaluated deviant ingroup members from their own and the group's perspective. Children rated cooperative deviancy positively and believed their group would do the same. Adolescents and adults believed that their group would negatively evaluate cooperative deviancy when their group supported a competitive allocation strategy. Reasoning varied based on norm and participants’ agreement with deviancy. Understanding an ingroup may not be favorable toward a cooperative deviant in a competitive context is a developmental challenge requiring the coordination of social and moral norms.

Children's and adolescents’ resource allocation was examined in a context of inequality between schools and a peer group norm of either equality or equity. Participants (N = 257; children, 7–11 years old and adolescents, 13–16 years old) were inducted into groups with either a lot (advantaged) or few (disadvantaged) art resources, in the context of an art competition. Participants were prescribed an equality (equal distribution) or equity (more resources for disadvantaged groups) norm, before allocating resources between groups. Adolescents, but not children, allocated significantly more resources to their disadvantaged in‐group than they did to a disadvantaged out‐group, particularly when prescribed an in‐group norm of equity. Participants who rectified the inequality referred to the unfair nature of the initial disparity. The findings revealed an important developmental shift between middle childhood and early adolescence regarding the influence of group status and norms on intergroup resource allocation in a competitive context.
Statement of contribution

What is already known on this subject?




Children have the capacity to challenge intergroup resource allocation inequalities.

Peer group norms can guide resource allocation in situations where inequality is not made salient.



What does this study add?




a peer group equity norm can guide adolescents to rectify an intergroup inequality.

Relative peer group advantage plays an increasingly important role in adolescence.

for children, maintaining equality can supersede adherence to a peer group norm.