Our research is intended to provide data on learning difficulties within students from scientific majors and the causes of school failure and abandon phenomena in the university. In this research, we are interested in the study of communication disorders and difficulties that these disorders may result in beyond the only language aspects. 519 chemistry students belonging to the Faculty of Sciences Ben M’sik at the University Hassan II Mohammedia -Casablanca participated in the survey. They are aged between 17 and 23 years and suffer no physical or mental disability. The questionnaire consists of 101 questions grouped into 8 themes.Our results indicate that communication disorders impact students’ self-confidence. Therefore, we can think that through their influence on self-confidence, these disorders cause a decrease in academic performance. High self-confidence is associated with the retention and academic success while a low self-confidence is associated with school failure and abandonment.