Data analysis
Descriptive statistics were used to summarize the demographic characteristics of all participants. We used the standardized response mean (SRM) and effect size (ES) to evaluate the responsiveness of the two groups on two dual task performance. The formula for these statistics are as follows, where D = raw score change on measure between pre- and post-intervention; SD = standard deviation at pre-intervention; SDWe used distribution-based and anchor-based approaches to estimate the MCID of dual task measures. Distribution-based MCID is calculated as one-half of the SD of all participants at pre-intervention [