The report you requested refers to the book (Russian title: " Ребенок-оптимист: Проверенная программа формирования характера " ) by Martin E. P. Seligman , the founder of positive psychology. Book Overview
The book presents a research-backed program developed at the University of Pennsylvania designed to protect children from the "epidemic of depression". Seligman argues that optimism is not just an innate trait but a cognitive skill that can be learned and unlearned through specific exercises.