Since launching in 2013, Train of Thought has been our most popular game: it’s been played half-a-billion times by 20 million people. We know people love Train of Thought, in part because it’s just a lot of fun. But what about the science behind the game?

At Lumosity, we believe finding opportunities to challenge yourself across a range of skills is important. With Lance Vikaros, our Director of Games Systems Design, we take a look at how Lumosity may overlap with the World Economic Forum's "21st Century Skills."