The term brain training is nothing new, however how effective is the 'N-back' method, does this work scientifically speaking?
There are mixed reviews on this: one claiming it works https://www.highiqpro.com/dual-n-back/latest-n-back-training-studies
Another it doesn't https://www.cambridgebrainsciences.com/more/articles/brain-training-still-not-vital