The National Space Biomedical Research Institue (NSBRI) is working on "MiniCog," an application that evaluates your level of cognative wherewithall. Dr. Stephen Kosslyn of NSBRI sums it up:
“Difficult tasks, such as an astronaut performing a space walk or a surgeon doing a complicated operation, require the utmost attention and vigilance. We’re developing a way for people to test themselves and make sure they are mentally up to the challenge. Test results can help users determine if they need to eat, sleep, exercise, or better focus their thoughts on the task at hand.”Read the NSBRI news release.