The dissertation has as its fir s t objective the study of the relative impact o f CHOICES on the constructs of congruence, id entity and decidedness. The second and more specific objective o f this research is to investigate whether or not there are certain types o f decision makers (rational, dependant and intuitive) that benefit more from CHOICES. Lastly, this research also investigates whether ones anxiety level has an impact on the relative success rate of CHOICES on its users in terms of congruence, identity and decidedness. This study's experimental group is made up o f 121 first-year, pre-university (CECEP) male and female students. Based on the results of a classification test, each student is placed in one of three decision making style groups (a. rational; b. intuitive; c. dependant). The rational decision making style group is then placed in one of three anxiety groups (a. low anxiety; b. moderate anxiety; c. high anxiety) based on the results of an anxiety test. All 121 students are pretested for the variables o f congruence, identity and decidedness. In addition, these students are then instructed to complete a CHOICES guidebook and to spend one-hour-and-a-half on CHOICES. Six weeks after the completion o f the treatment, students are administered posttests. It is hypothesized that the rational decision makers benefit significantly more from CHOICES than the dependant decision makers and the intuitive decision makers. The results o f the analysis of covariance do not support this hypothesis. It is also hypothesized that the rational decision makers characterized as moderately anxious benefit significantly more from CHOICES than those characterized as being part of the high or low anxiety group. The results of the analysis of covariance do not lend support to this hypothesis. The results o f a number of T-tests, however, show that most students improved their scores on the variables of identity and decidedness after using CHOICES. In addition, the use of the temporal deployment technique presented readers with a graphic representation of how each subject responded to CHOICES in terms of congruence, decidedness and identity. One o f the encouraging results o f this research is that there is an indication that CHOICES was generally a helpful counselling tool for students. The discussion of the results attempts to explain possible reasons why the hypotheses are not supported, while at the same time bringing to light some o f the positive results using a computerized counselling system such as CHOICES. Lastly, the limitation of the research and the need to pursue more research in this area are also discussed. / Québec Université Laval, Bibliothèque 2016