https://www.popsci.com/science/article/2012-10/whether-eat-or-save-marshmallow-depends-kids-view-world/
New Version of Classic Marshmallow Experiment Upends Original Conclusions
Whether to eat a treat now or save it for later depends on a child's worldview--which can be manipulated.
new versionmarshmallow experimentclassicupendsoriginal