Effects, contexts, mechanisms operating in a quasi-experimental design

This action research has been conducted by the Department of Communication and Social Research of the «Sapienza» University of Rome in collaboration with the Institute for Environmental Protection and Research (ISPRA). The aim of the study was to evaluate the efficiency of an information campaign on radioactivity and its risks, implemented by ISPRA, and directed towards students between 14 and 19 years of age in four cities of the Lazio region. The research was conducted using a quasi experimental design with pretest, post-test and non equivalent control group and did not follow a behaviourist concept of experiment, which would have proceeded on the basis of a simple stimulus-response pattern. Instead, the experimental variable, considered as the main stimulus, was taken into account together with contextual and dispositional characteristics, which can in theory intervene in the cause-effect relation but cannot be "manipulated" by the researcher.