Table 3 Group mean response accuracy and mean response speed in the verbal and non-verbal working memory tasks and their respective control tasks
TaskLow PCS Group 1Moderate PCS Group 2Control Group 3
Response accuracy (% correct)
    Working memory (verbal)80 (11.67)65 (12.36)†74 (6.29)
    Working memory (non-verbal)73 (10.41)63 (13.46)72 (6.32)
    Control task (verbal)97 (2.87)82 (8.49)†93 (8.24)
    Control task (non-verbal)95 (6.68)82 (10.87)†95 (5.56)
Response speed (ms)
    Working memory (verbal)1134 (162.20)*1212 (170.94)1313 (85.11)
    Working memory (non-verbal)1141 (148.74)1177 (169.61)1278 (136.15)
    Control task (verbal)933 (109.27)961 (235.70)1062 (113.47)
    Control task (non-verbal)944 (142.89)965 (272.39)1045 (143.89)

  • Values are mean (SD).

  • *Significantly different from control group 3 (p<0.05).

  • †Significantly different from low PCS group 1 (p<0.05).