"Luminosity is a site specializing in mental-challenge games to test your speed, reflexes and smarts. The site boasts that regularly playing games on the site will increase your mental acuity and smarts. Luminosity is designed to provide the brain with a 10-minute workout per day, which is said to improve the health and function of the brain over time...The site offers free accounts to new visitors, which requires only a valid email account. Registered users have access to a number of games that are designed to develop greater mental speed, memory, attention, flexibility and problem solving."