The largest proportion of researchers rated tDCS in research contexts (cognition, motor, affect) as “partly effective” (28-42%) or “mostly effective” (19-33%). Only a small percentage described tDCS as “ineffective” (2-5%) or “absolutely effective” (2-13%; Fig. 1A). Effectiveness ratings were highest for the motor domain (N = 213, mean±SD 1.71 ± 0.77) followed by cognition (N = 218, 1.49 ± 0.69) and affect (N = 143, 1.34 ± 0.68).
Source: Researchers’ perspectives on scientific and ethical issues with transcranial direct current stimulation: An international survey : Scientific Reports : Nature Publishing Group
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