Table 2. Scores in the battery and their combination into seven executive process scores.
| Tests | 19 scores | Process scores |
|---|---|---|
| Stroop | ||
| naming | Time, Error | Initiation1 |
| reading | Time, Error | Initiation1 |
| interference | Time, Error | Inhibition2 |
| Trail Making | ||
| part A | Time, Error | Initiation1 |
| part B | Time, Error, perseveration | Flexibility3 |
| Verbal fluency (categorical, letter) | Correct response | Generation4 |
| Modified Card Sorting | Category | Deduction5 |
| Error, perseveration | Flexibility3 | |
| Dual task | Mu6 | Coordination6 |
| Brixton | Error | Deduction5 |
| Six elements | Rank | Planning7 |
1: initiation: average of the z scores corresponding to the completion time (corrected for the error rate in each test) in the Trail Making Test A and Stroop naming and reading subtests;
2: inhibition: errors in the interference subtest—errors in the naming subtest of the Stroop Test;
3:flexibility: the mean value of the z scores corresponding to perseveration in the Card Sorting and Trail Making Test B;
4:generation: the mean value of the z scores corresponding to the fluency tests;
5:deduction: of the z scores corresponding to the category achieved in the Card Sorting test and errors in the Brixton test;
6: coordination: the z scores corresponding to the mu dual task index; Mu = 100[1-(decrement of digit series recall on dual task + decrement of tracking on dual task)/2]; where dual task decrement of series = proportion of series correctly recalled on single condition—proportion of series correctly recalled on dual condition; dual task decrement of tracking = (number of marked boxes on single condition—number of marked boxes on dual condition)/number of marked boxes on single condition.
7: planning: the z scores corresponding to the six elements task.