This study investigates how objective reality (truth vs falsity), intention (honest vs dishonest) and motivation (prosocial vs self-serving) affect lie labelling and moral judgment of lies. Using a comic-based task, we conducted a study with 5-6-year-olds and 9-10-year-olds (N = 194). Participants were presented with scenarios where a protagonist made either prosocial or self-serving statements that were truthful or false, with honest or deceptive intent. Results showed that younger children were more likely to judge objectively false statements as lies, while older children placed greater emphasis on the protagonist's intention. Prosocial lies were evaluated more positively than self-serving lies. However, contrary to prior research, prosocial lies were not less likely to be labeled as lies, but unlike in previous studies children were informed about the honest or dishonest intentions, which could prevent them from interpreting self-serving motivation as dishonest intentions. Additionally, lies were based on factual statements rather than opinions. Results of this research contribute to theory of mind, moral development, and social cognition research, offering insights into how children distinguish between truth and deception. The study also introduces a novel, language-independent tool for assessing children's understanding of deception, which may have applications in cross-cultural research and educational settings.
This study examined the effects of the MathByExample intervention, which integrates worked examples and self-explanation prompts into math worksheets to address 4th and 5th graders' misconceptions. Researchers conducted a year-long, classroom-based experiment in 58 U.S. classrooms, randomly assigning classrooms to experimental or control conditions. The study explored the intervention's impact on algebra readiness and the moderating effects of prior knowledge and intervention dosage. Results showed no significant overall impact of the intervention on foundational algebra knowledge (FAK) or preparation for future learning (PFL). However, further analysis provided key insights. For FAK scores, greater self-explanation prompt attempts improved learning, but only when students engaged with a high number of worksheets. Students with higher prior knowledge experienced a negative effect of attempting more worksheets, suggesting they may not benefit from excessive practice. Self-explanation attempts had a stronger positive effect for students with higher prior knowledge. For PFL scores, self-explanation attempts significantly improved PFL scores, but only for students with at least average prior knowledge, with the strongest effects seen in those completing more worksheets. These findings suggest that educators may benefit from actively incorporating the study and explanation of worked examples into elementary math instruction. To maximize their impact, teachers should regularly integrate worked examples into their lessons. Encouraging students to engage with worked examples through self-explanation may mitigate common misconceptions and enhance students' readiness for more advanced algebra concepts.

