Figure 2.

Mean “coolness,” “sourness,” “sweetness,” “fruitiness,” “irritation/harshness,” and “craving” rating (general version of the Labeled Magnitude Scale) during fixed-puffing bout sessions. (A) Green-apple-flavored e-liquid had a higher sourness rating in comparison to unflavored and menthol e-liquids. (B) Menthol-flavored e-liquid had a higher coolness rating versus unflavored and green-apple e-liquids. (C) Green-apple-flavored e-liquid had the highest sweetness rating versus menthol and unflavored e-liquids. Unflavored e-liquid had a higher sweetness rating than menthol. (D) Green-apple-flavored e-liquid had the highest fruitiness rating versus menthol and unflavored e-liquids. Unflavored e-liquid had a higher fruitiness rating than menthol. (E) There were no significant differences in irritation/harshness. (F) 6 mg/mL of nicotine had higher craving ratings than 12 mg/mL of nicotine. Sourness was log transformed and all other data was square-root transformed. Vertical bars represent least squares means. Error bars represent the standard errors of the means. Nic = nicotine. Letters on the right y-axis denote semantic labels of sensation intensity on the general Labeled Magnitude Scale: NS = no sensation; BD = barely detectable; W = weak; M = moderate; S = strong; VS = very strong; SI = strongest imaginable.