Celma–Merola J, et al. – This cross–sectional, observational study aimed to compare impulsivity, measured utilizing self–report and cognitive tasks in people who ceased smoking without treatment (self–changers) with each of the following groups: (i) smoking non–treatment seekers, (ii) people in smoking cessation treatment and currently abstinent, and (iii) people in smoking cessation treatment but non–abstinent. The authors suggested that individuals who have stopped smoking without treatment seem to have lower non–planning impulsivity and more effective cognitive inhibition compared with smoking non–treatment seekers and better cognitive inhibition than individuals who cease smoking with treatment aid.