Lumosity (sometimes referred to as Luminosity) is a full featured online brain training site with a large number of games that Lumosity claims will improve cognitive skills like memory, processing speed, attention, and problem solving.
Lumosity Game Scoring Methodology
Lumosity has a proprietary Brain Performance Index (BPI) to track user performance. BPI is based on a distribution of actual game scores (13 Million+ games), so you are compared against reliable statistical averages. Users can also compare their BPI against general averages for their age group.
Users should also note that Lumosity BPI will *not* be a useful comparison measure outside of the Lumosity game environment.