*2.4. Statistical Analyses*

Statistical analyses and graphics were performed using SPSS v19.0 (SPSS, Inc., Chicago, IL, USA) and GraphPad Prism v7.0 (GraphPad Software, La Jolla, CA, USA), respectively. All alpha levels were set at *p* < 0.05. As this was a pilot study, no power analysis was performed to predetermine sample size.

First, a descriptive analysis was performed, and the normal distribution of variables was verified by the Kolmogorov–Smirnov test. Baseline demographics were compared between both groups using χ2 tests for categorical data and Student's *t*-tests for continuous data. For the cognitive task, the mean scores (total and/or partial) were subjected to a repeated-measures analysis of variance (ANOVA). In addition, the Student's *t*-test was employed to compare means between groups.

Due to technical problems, some data were missing. The exact number of participants is indicated in each task.
