Zara Roberts was 18 and planning a career in teaching when a horrendous car crash left her in a coma, with severe injuries to her brain and body. Doctors rated her chance of survival at five percent. Yet, just six years later, she is well on the way to becoming a support worker for special needs children, and, this month, is being recognised for…

Fatigue resulting from sleep deficit can lead to decreased performance in a variety of cognitive domains and can result in potentially serious accidents. The present study aimed to test whether fatigue leads to increased Einstellung (low levels of cognitive flexibility) in a series of mathematical problem-solving tasks. Many situations involving…