Abstract
Tobacco habit removal by means of a criterion change programme. A treatment, based on changing criterion design, has been applied in order to modify the smoking cigarettes habit of a subject. The program begun by esta blishing the base line of the behaviour and introducing a constant operating technique by progressively modifying the behaviour to the right direction. A behavioral contract was made, consisting in a formal agreement by which means the subject was engaged to be subject to the treatment, accepting a punishment in the case he didnt accomplish it. The treatment began with the base line mean as the initially maximun quantity allowed of cigarettes, reducing it in a cigarette every two days; if the subject didn't exceed the maximun allowed quantity in the day before, the same treatment was kept until the criterion was reached. The obtained data will be analized by visual inspection of their graphical representation, studying the level and tendency changes, and also, by traditional statistical analysis and temporal series, waiting to find similar results througth the different techniques.
