With the support of a grant of the Ministry of Health CR a simple questionnaire for detection of "risk" personality types was elaborated. The questionnaire along with the method of subjective evaluation used in five spheres (smoking, alcohol, marihuana, computers, mobile phones) was administered to apprentices in their schools within the framework of lectures on lifestyle. The datawere obtained from 365apprentices, theexaminationwasanonymous.Theresults of the questionnaire were consistent with the results of previous surveys among university students and elementary school pupils. 10% apprentices with the risk type of personality were recorded. The relationship between the risk type of personality and the tendencyof abuse indifferent sphereswassignificant infourandwasnotrecorded as regards computers. More than half the apprentices were smokers, one third consumed alcoholic beverages regularly, one fifth took drugs, half of them are keen users of mobile phones and one quarter keen users of computers. There was a significant relationship between smoking, drinking and the use of mobile phones. The results support the theory of cumulation of risk behaviour and indicate the importance of the personality background in the syndrome of risk behaviour during adolescence.

        Key words: risk behaviour - personality - addictions