This crowdsourced project introduces a collaborative approach to improving the reproducibility of scientific research, in which findings are replicated in qualified independent laboratories before (rather than after) they are published. Our goal is to establish a non-adversarial replication process with highly informative final results. To illustrate the Pre-Publication Independent Replication (PPIR) approach, 25 research groups conducted replications of all ten moral judgment effects which the last author and his collaborators had "in the pipeline" as of August 2014. Six findings replicated according to all replication criteria, one finding replicated but with a significantly smaller effect size than the original, one finding replicated consistently in the original culture but not outside of it, and two findings failed to find support. In total, 40% of the original findings failed at least one major replication criterion. Potential ways to implement and incentivize pre-publication independent replication on a large scale are discussed

Introduction: Because greed is associated with various destructive outcomes, understanding the developmental precursors to dispositional greed in adolescence is of great importance. However, there are few empirical studies on this topic. The current study aimed to examine the relationship between childhood socioeconomic status (CSES) and adolescent greed and the moderating effect of family size. Two competing hypotheses were proposed. One is the scarcity hypothesis, which claims that CSES may be negatively related to adolescent greed. Another is the luxury hypothesis, which proposes that the richer the environment one grew up in, the more likely one is to develop dispositional greed. Method: A cross-sectional sample of 3,200 adolescents (11-19 years old, 1,712 females, 1,356 males, and 132 of unknown gender) from North, Northwest, Middle and South China completed the questionnaire sets. A hierarchical multiple regression analysis was conducted. Results: CSES was positively correlated with dispositional greed, and the moderating effect of family size was significant. Conclusion:The current study provides evidence supporting the luxury hypothesis over the scarcity hypothesis. In addition, adolescent dispositional greed increases with an increase in CSES when there is only one child in the family, while this is not the case for children with siblings. The theoretical and practical implications of the current study results as well as future research directions are discussed.

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T he developing world is witness to a major urban transformation. How to facilitate intergroup relations between new migrants and long-time urban residents is a critical issue in developing societies globally. The current research explored the effect of group boundary permeability on intergroup prejudice by the case of rural-to-urban migration in China. As the boundary between rural-to-urban migrants and permanent urban residents in China can be ascribed to China's unique hukou system, we conducted three interrelated studies to approach the topic from the perspective of the hukou system and its reforms. Study 1 used a correlational investigation and found a negative correlation between group boundary permeability and prejudice against rural-to-urban migrants. In Study 2, we manipulated the group boundary permeability using the points accumulation system scheme of the hukou system reform, and found a causal effect of the group boundary permeability on the social distance of urban dwellers to migrants. In Study 3, using a more general hukou reform scheme, that of gradually abolishing the hukou system, we replicated the findings from Study 2 and further found that a permeable group boundary could reduce prejudice. These three studies suggest that the group boundary based on the Chinese hukou system is an institutional cause of prejudice against rural-to-urban migrants. Our experimental manipulations can be interpreted as analogues to potential policy arena actions.