only marginally significantp = 0.085
The interaction reflected a significant trial type effect for CSI 300 ms trials ( M = 435.55, SD = 98.94 for single-task, and M = 473.44, SD = 130.29 for non-switch trials, p < 0.001), and CSI 800 ms trials ( M = 389.98, SD = 35.14 for single-task, and M = 410.92, SD = 64.37 for non-switch trials, p = 0.02), whereas the difference between trial types was only marginally significant for CSI 600 ms trials ( M = 417.74, SD = 58.60 for single-task, and M = 433.45, SD = 85.01 for non-switch trials, p = 0.085).