A study that was led by Maartje Luijten (Radboud University, Nijmegen) has been published in the journal: Nicotine & Tobacco Research.
We used the computerized slips-of-action task to study the balance between goal-directed and habitual control in smokers. We found no differences overall between the smokers and a nonsmoking control group in task performance. However, individual differences in smoking severity were significantly and negatively correlated with performance, pointing at impaired goal-directed control in more severe smokers.
Luijten, M., Gillan, C.M., de Wit, S., Franken, I.H.A., Robbins, T.W., Ersche, K.D. (2019). Goal-Directed and Habitual Control in Smokers. Nicotine & Tobacco Research, doi.org/10.1093/ntr/ntz001