"When something like a ladybug lands on you": Origins and development of the concept of luck.

In Study 1, 103 children ages 4 through 10 answered questions about their concept of and belief in luck, and completed a story task assessing their use of luck as an explanation for events. The interview captured a curvilinear trajectory of children's belief in luck from tentative belief at age 4 to full belief at age 6, weakening belief at age 8, and significant skepticism by age 10. The youngest children appeared to think of luck simply as a positive outcome; with age, children increasingly considered the unexpected nature of lucky outcomes and many came to view luck as synonymous with chance.