Your Brain Performance Index (BPI) is how you measure and track your cognitive performance, and compare your ability in one area to another. All active Lumosity users have a BPI after playing at least one game in each cognitive category. On the iPhone, you can check yours in the Brain Profile. On Lumosity.com, you can check it in My History.
An increase in BPI indicates improvement. An increase of more than 200 points represents a substantial improvement of at least 1 standard deviation. Remember that BPI is a way to track your own personal progress – it is not intended as a way to compare yourself to other people.
The BPI scales are based on an analysis and ranking of over 7,200,000 real game results. We used these game results to create a distribution of scores for each activity so we know how an individual score stacks up to all others. We then evaluate your game scores and use a proprietary algorithm to derive your BPI. Each time you play, we update your BPI to accurately reflect your current brain performance.
Your Overall BPI is your average BPI across each of the four cognitive areas: attention, memory, processing speed and cognitive control. This number provides a concise measure of your overall brain performance. If you are weak in one area, it will bring down your overall score, so it’s a good idea to focus on the games where you scores are lowest.
Since the iPhone / iPod touch is a very different platform from the web with a different user interface, we calculate the BPI based on scores from these mobile devices separately. For example, Memory Matrix on the iPhone is considered to be a completely different game from Memory Matrix on Lumosity.com. Therefore, your BPI does not get affected when playing these two games on the two platforms.
Yes. The BPI converts scores in very different activities to the same scale based on average scores across all users. For example, a BPI of 400 in Memory Matrix is equivalent to a BPI of 400 in Lost in Migration.
For more information, please visit Lumosity.com.