Downvoter(s): This comment was made before the title was changed, it previously referenced Ballmer Peak.
Quoted from the figure caption under the two candlestick charts on the right-hand side of the article: "People who report drinking one or two alcoholic beverages daily and getting around seven hours of sleep nightly performed best on a Lumosity game that measures spatial memory, a recent study of more than 160,000 users reveals."