Table 4.

Statistical Specifications

	EEG parameter		Testing for normality
Authors	Unity	Change expressed as	Normality check of untransformed data	Log transformation	Normality check of transformed data	Statistical method	Method to control over MCP	Indication of effect size measure
Röschke and Mann [1997]	P	D	−	−	−	NP	−	−
Hietanen et al. [2000]	P	D	−	−	−	PA	−
Croft et al. [2002]	A	D	−	+	−	PA	+	+
D’Costa et al. [2003]	P	D	−	−	−	PA	−	−
Curcio et al. [2005]	P	D	+	P	+	−
Perentos et al. [2007]	P	D	−	−	−	PA	+	−
Regel et al. [2007]	P	R a	−	+	P	−	−
Croft et al. [2008]	P	D	+ (↓)	−	−	NP	+
Hinrikus et al. [2008a]	P	R b	−	−	−	PA	+	−
Hinrikus et al. [2008b]	P	R b	−	−	−	PA	+	−
Kleinlogel et al. [2008]	P	D	+ (↓)	+	+ (↑)	PA	+	−
Croft et al. [2010]	P	R c , D	+ (↓)	−	−	NP	+	+ d
Hinrikus et al. [2011]	P	R b	−	−	−	PA	+	−
Loughran et al. [2013]	P	R a	−	−	−	PA	+	−
Perentos et al. [2013]	A	D	+ (↓)	−	−	NP	+	−
Suhhova et al. [2013]	P	R b	−	−	−	PA	+
Trunk et al. [2013]	P	D	NSP	+	+ (↑)	PA	+
Ghosn et al. [2015]	P	D	−	+	−	PA	+	−
Curcio et al. [2015]	P	R c , D	−	+	−	PA	−
Roggeveen et al. [2015]	P	D	+ (↓)	+	NSP	PA	+	−
Zentai et al. [2015]	P	D	NSP	+	+ (↑)	PA	−	+
Yang et al. [2017]	P	D	−	−	−	PA	+	−

A = amplitude; D = difference; NSP = not specified; NP = nonparametric; PA = parametric; P = power; R = ratio; + =  applies on the basis of the information reported; − = information was not reported; ↓ = not normally distributed data; ↑ = =normally distributed data.

^aFirst post exposure intervals relative to baseline and second verum relative to sham in %.

^bDring exposure intervals relative to baseline for each exposure condition.

^cDuring and post exposure intervals relative to baseline for each exposure condition.

^dOnly for one subsample.