Characteristics and social representation of ecstasy in Europe - Irefrea

consumers surveys to ecstasy consumers surveys and, then choose the ones that arecomparable. This option seems to be the most recommendable option because wethink we can save time this way. In case the responsible chooses this option, onemust take into account that is convenient to make more surveys than the strictlynecessary because not all of them will be useful for the control group.2. Sample of university:–Size of the sample:Between 80 and 100 people for each group (consumers and control). As the hole classwill be polled, it is recommended to accomplish a minimum of 500 surveys to getbetween 80 and 100 consumers. Control group will be made from the same sample.–Criterion for the faculties selection:Faculties or university departments that are in the five cities selected for the analysisand, between them, those of better access, procuring that sciences and letters are bothrepresented. According to the information we have the faculties or studies that havebeen chosen are:• humanities faculty⇒ History (20% of the sample: minimal of 100 people)⇒ Philosophy (20% of the sample: minimal of 100 people)• faculty of psychology or social work (20% of the sample: minimal of 100 people)• sciences faculty⇒ Biology (20% of the sample: minimal of 100 people)⇒ Computer science or mathematics (20% of the sample: minimal of 100 people)Furthermore it is recommended to poll at least two classes of different courses, forexample two classes of a first history course and two classes of a third or fourth courseof the same speciality and the same with each study.–Protocol:Proceed according to the requirements of each country to obtain permission to polluniversity students. In Spain, for example, we will ask some university professors topermit us to use his/her lesson time to poll the students. We will give thequestionnaires to the students to fill them, and we will be there to resolve doubts andto collect the already filled questionnaires.252