Table 5.

Instructions, cognitive abilities trained, scoring system of the CMG, and how processing speed is measured in each of the CMG included in this study.

CMG	Instruction	Main cognitive abilities trained	Time per CMG (s)	Total training time (min)	Scoring system	Processing speed
Square Numbers	Match the target shown on top by adding two or more number blocks	Quantitative reasoning Arithmetic Working memory	70	117	Base score for each correct answer with a speed related bonus (50 − (elapsed seconds × 5)) Streak up after 4 correct rounds, down after 5 incorrect	The processing speed is measured as the inverse of the average time to perform the different calculations
Memory Sweep	Memorize the positions of the highlighted tiles and remember their positions when gone	Attention Spatial memory Working memory	90	150	Points for each correct square (250) plus a base score for complete round Streak up (bonus) after 1 correct answer, down after 1 incorrect move	NA
Word Pair	Pair words according to a specific rule presented (similar, opposite)	Semantic access Vocabulary	90	150	Base score for correct round, streak up after 2 correct answers, down after 2 incorrect	The processing speed is measured as the inverse of the average time to pair the different words
Babble Bots	Create the maximal number of words of at least 3 letters with the 6 available letters	Word fluency Vocabulary	60	100	Points for letters in word multiplied by the word length, as the streak multiplier. Letter scores are localised to the region based on the Scrabble scoring system	NA
Must Sort	Sort the items correctly by tapping on the correct side	Response control Task shifting	45	75	Base score multiplied by streak multiplier, streak is incremented by correct answers and is reduced to 1 on incorrect or more than 5 s between answers	The processing speed is measured as the inverse of the average time between when the card appears and taping on the screen
Unique	Find the odd one out and tap on it	Visual attention Visual recognition	70	117	Baseline score per correct answer based on difficulty level. Delta is added to the baseline and becomes larger with consecutive correct answers (Baseline + (streak × delta)). Streak of 8 correct up, 6 down	The processing speed is measured as the inverse of the average time between when the objects appear and the discovery of the unique object
Rush Back	Memorize a shape, then decide if the next shape matches the one memorized	Sustained attention Visual recognition Working memory	45	75	One base score per difficulty level with a multiplier which goes up and down based on streak Streak up of 4 correct in a row but not changed during game play Bonus for end of game, current streak multiplier × bonus	The processing speed is measured as the inverse of the average time between when the card appears and the classification