Beliefs play a central role in human development. For instance, a growth mindset-a belief about the malleability of intelligence-can shape how adolescents interpret and respond to academic difficulties and how they subsequently navigate the educational system. But do usually-adaptive beliefs have the same effects for adolescents regardless of the contexts they are in? Answering this question can reveal new insights into classic developmental questions about continuity and change. Here we present the Mindset x Context framework and we apply this model to the instructive case of growth mindset interventions. We show that teaching students a growth mindset is most effective in educational contexts that provide affordances for a growth mindset; that is, contexts that permit and encourage students to view ability as developable and to act on that belief. This evidence contradicts the beliefs alone hypothesis, which holds that teaching adolescents a growth mindset is enough and that students can profit from these beliefs in almost any context, even unsupportive ones. The Mindset x Context framework leads to the realization that in order to produce more widespread and lasting change, we must complement the belief-changing interventions that have been aimed at students with new interventions that guide teachers toward classroom policies and practices that allow students' growth mindset beliefs to take root and yield benefits.

Individuals who are strongly fused with a group view the group as self-defining. As such, they should be particularly reluctant to leave it. For the first time, we investigate the implications of identity fusion for university retention. We found that students who were strongly fused with their university (+1SD) were 7-9% points more likely than weakly fused students (-1SD) to remain in school up to a year later. Fusion with university predicted subsequent retention in four samples (N = 3,193) and held while controlling for demographics, personality, prior academic performance, and belonging uncertainty. Interestingly, fusion with university was largely unrelated to grades, suggesting that identity fusion provides a novel pathway to retention independent of established pathways like academic performance. We discuss the theoretical and practical implications of these findings.

As stereotype threat was initially examined in experimental settings, the effects of such threats have often been tested by temporarily manipulating social identity threats. This study expands the literature by examining 9th-grade adolescents' naturalistic stereotype threat, using data from the National Study of Learning Mindsets in the United States (n = 6040, age: 13-17, M-age = 14.31, 6.9% Black boys, 6.5% Black girls, 13.1% Latinos, 12.3% Latinas, 31.5% White boys, 29.7% White girls). The results indicate that Black and Latinx students experience higher levels of stereotype threat in high school mathematics classrooms than do their White peers. When students perceive that their teachers have created fixed mindset climates, they experience greater stereotype threat. Stereotype threat, in turn, negatively predicts Black and Latino boys and White girls' later achievement via anxiety. These findings highlight the importance of creating mathematics classrooms that cultivate a growth mindset and minimize social identity threat.

Lay theory interventions instill situation-general ways of thinking, often using short reading and writing exercises, and they have led to lasting changes in behavior and performance in a wide variety of policy domains. Do they work in all contexts? We suggest that lay theory intervention effects depend on psychological affordances, which are defined as cues that allow individuals to view a lay theory as legitimate and adaptive in that context. The present research directly and experimentally tested this hypothesis using the example of a purpose for learning lay theory intervention, which taught the lay theory that school is a place to develop skills that allow one to make progress toward self-transcendent aims. A double-blind 2 (student purpose intervention) x 2 (purpose-affording note) field experiment was conducted in a relatively low-performing public middle school in the United States. Students first received a web-based purpose for learning lay theory intervention (or a control activity), and 2 weeks later attended a class in which an assignment was accompanied by a purpose-affording note that was hand-written by a teacher (or a control note). Results showed that the purpose lay theory intervention increased performance on an English class writing assignment, but only when it was accompanied by a purpose-affording note. Exploratory analyses revealed that the effects of the manipulations were apparent among students who were at greater risk for poor performance in the class: nonnative English-speaking students. Thus short, online lay theory interventions may reduce performance gaps, provided that the contexts afford the opportunity for the proffered lay theory to seem legitimate and adaptive.

The growth mindset is the belief that intellectual ability can be developed. This article seeks to answer recent questions about growth mindset, such as: Does a growth mindset predict student outcomes? Do growth mindset interventions work, and work reliably? Are the effect sizes meaningful enough to merit attention? And can teachers successfully instill a growth mindset in students? After exploring the important lessons learned from these questions, the article concludes that large-scale studies, including preregistered replications and studies conducted by third parties (such as international governmental agencies), justify confidence in growth mindset research. Mindset effects, however, are meaningfully heterogeneous across individuals and contexts. The article describes three recent advances that have helped the field to learn from this heterogeneity: standardized measures and interventions, studies designed specifically to identify where growth mindset interventions do not work (and why), and a conceptual framework for anticipating and interpreting moderation effects. The next generation of mindset research can build on these advances, for example by beginning to understand and perhaps change classroom contexts in ways that can make interventions more effective. Throughout, the authors reflect on lessons that can enrich metascientific perspectives on replication and generalization.

Psychologically “wise” interventions can cause lasting improvement in key aspects of people’s lives, but where will they work, and where will they not work? We consider the psychological affordance of the social context: Does the context in which the intervention is delivered afford the way of thinking offered by the intervention? If not, treatment effects are unlikely to persist. Change requires planting good seeds (more adaptive perspectives) in fertile soil in which those seeds can grow (a context with appropriate affordances). We illustrate the role of psychological affordances in diverse problem spaces, including recent large-scale trials of growth-mind-set and social-belonging interventions designed specifically to investigate heterogeneity across contexts. We highlight how the study of psychological affordances can advance theory about social contexts and inform debates about replicability. © The Author(s) 2020.

A global priority for the behavioural sciences is to develop cost-effective, scalable interventions that could improve the academic outcomes of adolescents at a population level, but no such interventions have so far been evaluated in a population-generalizable sample. Here we show that a short (less than one hour), online growth mindset intervention-which teaches that intellectual abilities can be developed-improved grades among lower-achieving students and increased overall enrolment to advanced mathematics courses in a nationally representative sample of students in secondary education in the United States. Notably, the study identified school contexts that sustained the effects of the growth mindset intervention: the intervention changed grades when peer norms aligned with the messages of the intervention. Confidence in the conclusions of this study comes from independent data collection and processing, pre-registration of analyses, and corroboration of results by a blinded Bayesian analysis.

A growing number of methods aim to assess the challenging question of treatment effect variation in observational studies. This special section of Observational Studies reports the results of a workshop conducted at the 2018 Atlantic Causal Inference Conference designed to understand the similarities and differences across these methods. We invited eight groups of researchers to analyze a synthetic observational data set that was generated using a recent large-scale randomized trial in education. Overall, participants employed a diverse set of methods, ranging from matching and flexible outcome modeling to semiparametric estimation and ensemble approaches. While there was broad consensus on the topline estimate, there were also large differences in estimated treatment effect moderation. This highlights the fact that estimating varying treatment effects in observational studies is often more challenging than estimating the average treatment effect alone. We suggest several directions for future work arising from this workshop. © 2019 Carlos Carvalho, Avi Feller, Jared Murray, Spencer Woody, and David Yeager.

A promising way to mitigate inequality is by addressing students' worries about belonging. But where and with whom is this social-belonging intervention effective? Here we report a team-science randomized controlled experiment with 26,911 students at 22 diverse institutions. Results showed that the social-belonging intervention, administered online before college (in under 30 minutes), increased the rate at which students completed the first year as full-time students, especially among students in groups that had historically progressed at lower rates. The college context also mattered: The intervention was effective only when students' groups were afforded opportunities to belong. This study develops methods for understanding how student identities and contexts interact with interventions. It also shows that a low-cost, scalable intervention generalizes its effects to 749 4-year institutions in the United States.