TABLE 3.

Studies and experimental characteristics of tES literature for ASD.

Authors	Subjects	Stimulation parameters				Neuroimaging		Conclusion
		Type	Current	Duration	Location	Type	Feature
Kang et al., 2018	13	tDCS	1 mA, 20 min	10 sessions	Anode: DLPFC, cathode: right supraorbital	EEG	Complexity	The complexity of EEG significantly increased after tDCS. This study suggests that tDCS may be a helpful tool for the rehabilitation of children with ASD.
Amatachaya et al., 2015	24	tDCS	1 mA, 20 min	1 session	Anode: left DLPFC (F3), cathode: right shoulder	EEG	Peak alpha frequency	The clinical (autism treatment evaluation checklist) and neurological (peak alpha frequency) performance was improved after the treatment of active tDCS.