Table 1.

Single-task performance: number of pegs inserted [Grooved Pegboard Test (GPT)] and number of correct subtractions [Serial Seven Subtraction Task (SSST)] within 30 s before (PRE), during (DUR) and 30 min after (POST), unilateral (Ul), bilateral (Bl) and sham transcranial direct current stimulation (tDCS) of left (AL) and right (AR) dorsolateral prefrontal cortex (DLPFC). Simple reaction time (SRT), before, during and after tDCS in all five montages.

	BAL	BAR	UAL	UAR	Sham
SSSTPRE	10.18 ± 2.3	10.04 ± 2.5	10.36 ± 2.6	10.22 ± 2.2	10.18 ± 2.4
SSSTDUR	10.31 ± 2.2	10.04 ± 2.1	10.27 ± 2	10.18 ± 2.3	10.4 ± 2.1
SSSTPOST	10.72 ± 2.4	10.59 ± 2.4	10.54 ± 2.6	10.63 ± 2.5	10.72 ± 2.7
GPTPRE	14.45 ± 2.1	14.72 ± 1.4	14.18 ± 2	14.22 ± 1.6	14.31 ± 1.8
GPTDUR	14.77 ± 1.9	14.31 ± 1.6	14 ± 1.8	14.13 ± 2.1	14.13 ± 2.1
GPTPOST	14.04 ± 1.9	14.27 ± 1.9	14.54 ± 1.7	14.4 ± 1.9	13.86 ± 2.1
SRTPRE	293.36 ± 41.1	300.59 ± 39.8	304.86 ± 37.3	301.4 ± 43.5	296.59 ± 46.8
SRTDUR	296.36 ± 40.9	306 ± 40.3	302.95 ± 39.5	296.31 ± 43.2	302.81 ± 41.9
SRTPOST	303.04 ± 44.6	299.86 ± 44.1	305.13 ± 42.4	295.45 ± 43	297.9 ± 37.5

Simple reaction time (SRT), before, during and after tDCS in all five montages. Data are expressed as mean ± SD.