Introduction: Self-regulation is the ability to adequately plan and manage one's own behavior in a flexible manner. It is a predictor of well-being, health, academic performance, among others. The psychometric characterization of the Self-Regulation Questionnaire-Abbreviated (CAR-abr.) composed of 17 items is presented. A versatile instrument, used exhaustively in various countries and professional contexts such as education or clinical. Method: The questionnaire was validated for content to verify its linguistic and cultural suitability and subsequently administered to a convenience sample. The survey involved 710 Colombian university students from 12 degrees, aged 18 to 33 years ( M = 20.3, SD = 4.3), 31.5% men. Results: The results indicate a good fit of the items to the Rasch model, an adequate functioning of the Likert scale and evidence of construct validity, although the questionnaire would benefit from the inclusion of more difficult items. Reliability was .84 for individuals and .98 for items. The self-regulation score correlated positively with flourishing (0.416** p <0.01) and mental health (0.372** p <0.01), and negatively with bad habits (-0.343** p <0.01). Discussion and conclusions: The test can be used in various measurement and assessment contexts. It allows the level of self-regulation to be established with sufficient reliability and evidence of validity, according to the results with the sample used. The possible uses and limitations of the CAR-abr. for psychological measurement and assessment are discussed.