2.3 Data analysis
Cortisol concentrations and SA-I scores were used as indicators of
stress levels. A 2 (group: stress and control groups) × 3 (measurement
time points: baseline, post-TSST, and post-N-back task)
repeated-measures ANOVA was performed on the data. To calculate the mean
accuracy and reaction time for all participants, a 2 (group: stress and
control groups) × 3 (WM load: 0-back, 1-back, and 2-back)
repeated-measures ANOVA was performed on the data. Greenhouse–Geisser
corrected p values were used when appropriate.