Table 3.

Cognitive outcome variables assessed in this study

Task	Outcome variables	Description
Simultaneous box crossing and digit sequences repetition [73]	Correct digits recalled under single task condition; correct digits recalled under dual task conditions; boxes identified under dual task condition.	Correct number of recalled digits in a standard digit span test; correct number of recalled digits in the dual condition; number of boxes identified in the dual condition
Stroop test [109]	Stroop interference score	Calculated by subtracting the number of errors from the total number of items presented in the test
Trials test [73]	Trail test switching	Performance accuracy: reflects the ability of moving flexibly from one set of rules to another in response to changing task requirements
Verbal and category fluency test [110]	Verbal and category fluency	Number of generated words starting with the following letters: “F”, “A”, “S” and “M”, “C”, “R”; number of generated words belonging to the following categories: “animals” and “boys’ names” and “supermarket items” and “girls’ names”

Tests were carried out before and after the training, and a percentage change score was computed for each variable.