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Symptoms reported on smoking versus abstinent days. All symptom reports were obtained at non-smoking occasions. Panel a shows raw means for craving and restlessness, which are highly-responsive to abstinence (Shiffman, Ferguson, et al., 2006). Panel b shows standardized factor scores, expressed as T-scores (M = 50, SD = 10) for dimensions relevant to nicotine withdrawal. * p < .001.
