How much does "LoL" improve brain function? An analysis of the brains of 68 people who played for five months, compared with other games, published in a journal: A bit of old Innovative Tech

A 5-month EEG study followed 68 university students with little gaming experience as they played either League of Legends or 三国殺.

Both groups improved on cognitive tasks, but the League of Legends group showed larger and more lasting gains, especially in attention.

League of Legends also produced stronger brain-signal changes, including more low-frequency power and reduced alpha-band connectivity.

The findings suggest fast-paced competitive games may drive stronger cognitive and neural effects than slower strategy games.