Performance during the intervention for each participant in the SoroTouch group.

“Usage time” represents the time (in minutes) that the participant performed SoroTouch during the intervention period.”Number of answers” represents the number of questions solved by the participant during the intervention period. “Number of correct answers” represents the number of questions solved by the participant that were answered correctly. “Number of wrong answers” represents the number of questions that the participant solved incorrectly. "Final level of achievement" is the level of mental arithmetic that the participant was able to perform after 6 months of intervention. For example, "Addition and subtraction of three 2-digit units." represents addition or subtraction such as "52+28–30." "Addition and subtraction of two 2-digit units and one 1-digit unit." represents addition or subtraction such as "67+4+23." "1-digit × 2-digit multiplication" represents multiplication such as "23 x 6," and "4-digit ÷ 1-digit division" represents division such as "8685 ÷ 3". (XLSX)