TABLE 5.

Means and standard deviations of the mean amplitudes (μV) of the Late Positive Components for all groups and conditions.

	All participants			Excluding participants with shorter than
				12 h abstinence since last cannabis use
	Control group	Cannabis users	Polydrug users	Cannabis users	Polydrug users
Old image	2.01 (1.75)	2.71 (1.82)	3.22 (1.45)	2.81 (1.91)	3.16 (1.45)
New image	1.88 (1.63)	2.42 (1.45)	3.37 (1.36)	2.41 (1.45)	3.38 (1.40)
Mean	1.95 (1.67)	2.57 (1.55)	3.30 (1.33)	2.61 (1.61)	3.27 (1.36)