The article deals with the issues of an individual’s professional development at the stage of professional training at a university. It is noted that being responsible is a vital principle and a professionally important quality of a teacher. The study aims to identify the characteristics of the professional development of students with low and high indicators of “responsibility”, which reflect the level of social maturity of the individual. Low indicators of “responsibility” characterize a person as “frivolous” who is guided by momentary motives rather than by a sense of duty in his decisions and actions. Often such a person does not take some situations that require a mature approach seriously. High values characterize a person as independent and ready to take responsibility for their decisions and actions. The students of the Russian State Vocational Pedagogical University branch in the city of Nizhny Tagil testing results, carried out using the computer diagnostic complex “Profkaryera”, are presented. It is statistically confirmed that students with low indicators of “responsibility” are more inclined to communicative and innovative activities; they should develop self-organization and emotional regulation skills. Students with high scores of “responsibility” are more inclined to administrative and analytical activities; they are encouraged to master time management techniques and develop the ability to manage other people.