Let's begin from the Library Homepage to find this article from its citation:
White, R. E., Prager, E. O., Schaefer, C., Kross, E., Duckworth, A. L., & Carlson, S. M. (2017). The “Batman Effect”: Improving perseverance in young children. Child Development, 88(5), 1563–1571. https://doi.org/10.1111/cdev.12695