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Table 1 Mean RTs (in ms), hits, correct rejections, false alarms, and misses (in percent) for the N-back task as a function of condition (sham vs. active) and stimulation protocol (off-line vs. online stimulation)

From: “Unfocus” on foc.us: commercial tDCS headset impairs working memory

N-back (WM monitoring/updating) Off-line stimulation Online stimulation
Sham Active Sham Active
2-back
 Reaction times (ms) 480 (19.1) 487 (16.5) 505 (19.1) 496 (16.5)
 Hits (%) 90.9 (2.0) 88.5 (2.2) 90.7 (2.0) 85.5 (2.2)
 Correct rejections (%) 93.1 (2.8) 92.9 (1.7) 92.1 (2.8) 91.1 (1.7)
 False alarms (%) 6.9 (2.8) 7.1 (1.7) 7.9 (2.8) 8.9 (1.7)
 Misses (%) 9.1 (2.0) 11.5 (2.2) 9.3 (2.0) 14.5 (2.2)
4-back
 Reaction times (ms) 561 (11.6) 575 (15.7) 575 (11.6) 559 (15.7)
 Hits (%) 63.3 (3.7) 59.9 (2.9) 68.7 (3.7) 64.1 (2.9)
 Correct rejections (%) 78.5 (3.2) 82.1 (2.3) 78.8 (3.2) 79.0 (2.3)
 False alarms (%) 21.5 (3.2) 17.9 (2.3) 21.2 (3.2) 21.0 (2.3)
 Misses (%) 36.7 (3.7) 40.1 (2.9) 31.3 (3.7) 35.9 (2.9)
  1. Standard errors are shown within parentheses