Lumosity is an online program consisting of games claiming to improve memory, attention, flexibility, speed of processing, and problem solving. Wikipedia
Research exclusive to this game
Bainbridge, Katie, and Richard E. Mayer. “Shining the light of research on Lumosity.” Journal of Cognitive Enhancement 2 (2018): 43-62.
Mayer, Richard E., Jocelyn Parong, and Kaitlin Bainbridge. “Young adults learning executive function skills by playing focused video games.” Cognitive Development 49 (2019): 43-50.
Research that includes this game in its sample
Shute, Valerie J., Matthew Ventura, and Fengfeng Ke. “The power of play: The effects of Portal 2 and Lumosity on cognitive and noncognitive skills.” Computers & education 80 (2015): 58-67.