Although their control group was made to play video games instead of just doing nothing. Not sure why they did that.

The researchers recruited two groups, each with 64 healthy young adults. One group was asked to follow the Lumosity™ regimen, performing the executive function games for 30 minutes a day, five days a week for 10 weeks. The other group followed the same schedule but played online video games instead. Both groups were told that the study was investigating whether playing online video games improves cognition and changes one's decision-making.

The researchers had two assessments of decision-making that participants completed before and after the training regimen. To assess impulsive decision-making, the participants were asked to choose between smaller rewards now and larger rewards later. To assess risky decision-making, they were asked to choose between larger rewards at a lower probability versus smaller rewards at a higher probability.

The researchers found that the training didn't induce any changes in brain activity or decision-making during these tasks.