This project aimed to understand how Psychology, in the fi eld of public policies, can present characteristics and similarities that lead to understanding the sense of unity in professional practice, in different areas of activity. It was a documentary, bibliographical and qualitative research, which used Bardin’s Content Analysis techniques for the critical interpretation of offi cial documents (CREPOP’s Technical References and Resolutions for professional practice) and theoretical bases. For the analyses, the MAXQDA was used considering variables/markers and their meanings, together with the reading of documents on attributions and professional practices of Psychology. The References analyzed dealt with the work in Psychology in the following spaces: Brazilian Health System Hospital Services; Human Mobility and Transit; Primary Health Care; Psychosocial Units and, Emergencies and Disasters. Once the analysis corpus was built, the most frequent results in the categorization of main terms were: Treatment (70), Reception (53) and Prevention/Promotion (45). Once the concepts were constructed for each category, treatment and promotion/prevention stood out – such as strategies and interventions aimed at minimizing mental health problems –, as well as autonomy and improving the quality of life of the person assisted. Recognizing the limits of the methodological framework, it was observed that a single defi nition for the work in Psychology was not feasible, while demonstrating possibilities of understanding transversal and common practices to envision a sense of unity, with social commitment, and that respects the particularities and breadth of this science and profession.Keywords: Psychology, professional practice, public policies, social commitment