What is the relationship between the awareness of linguistic prestige and the security or insecurity in the use of minoritised languages? Is formal linguistic insecurity (as initially described by Labov) the same as the speakers' perception of linguistic insecurity? Which are the variables related to the various types of linguistic insecurity in bilingual environments? How does schooling affect this phenomenon? This paper attempts to provide an answer to these questions, based on the results of a research project on linguistic insecurity (LI) carried out in a social context, the Valencian Autonomous Community (Spain), where there are two official languages (Spanish and Catalan) competing against each other, but with a very different degree of social recognition. The choice of an academic environment for this study is justified by the importance that the LI phenomenon may have within the context of language learning in multilingual contexts. (Contains 14 notes, 3 tables, and 4 figures.)