Effects of Physical-Cognitive Dual Task Training on Executive Function and Gait Performance in Older Adults: A Randomized Controlled Trial

Table 1

Description of the executive function indices obtained from the Random Number Generation test.

Inhibition
Turning point index (TPI)	Measure of the similarity between the real frequencies of turning points, marking a change between ascending and descending series of numbers and their theoretical frequency in random responses
Adjacency	Measure of the relative frequency of pairs of adjacent ascending or descending numbers and reflecting the habitual tendency to count forward or backward
Runs	Index of variability of the number of digits in successive ascending or descending runs
Working memory
Redundancy	Measure reflecting the unbalance of response alternative frequencies that derives from a more frequent usage of given numbers as compared to others in a sequence of generated numbers based on the theoretical frequencies of each digit
Coupon	Measure of the mean number of responses given before all the alternative responses are used
Mean repetition gap	Average quantity of digits between successive occurrences of the same number calculated for all digits throughout the whole sequence