Many internationally studies, in the last two decades, found problematic internet use associated with a variety of psychosocial problems, but in Portugal this is a recent research question specially in adults.

To explore the relationship between problematic Internet use, emotional regulation and self-esteem.

138 Portuguese subjects (77.5% females), with a mean age of 27.76 years old (SD = 8.98, range: 18-58) filled in the Portuguese versions of the Generalized Problematic Internet Use Scale-2, the Difficulties in Emotion Regulation Scale and the Rosenberg Self-Esteem Scale.

Negative consequences subscale of generalized problematic internet use was positively correlated with all the emotional regulation difficulties subscales and negatively with Self-Esteem, and positively with daily hours of internet usage. A similar result was found for Self-Deficient Regulation subscale, except for Clarity subscale. Mood Regulation was correlated with Strategies, Goals and Self-Esteem. Males showed higher levels of Negative Consequences. Age and age onset of Internet use were negatively correlated with Mood Regulation, Self-Deficient Regulation and Negative Consequences. A statistically significant difference in Mood Regulation, Self-Deficient Regulation and Negative Consequences in marital status levels, and in professional situation, with higher median scores in divorced and single without a relationship and in student subjects; no significant differences were found in educational level.

Generalized problematic Internet use, especially their Negative Consequences, is associated with higher emotional dysregulation, low self-esteem, lower age and lower age of Internet onset, being divorced or single without a relationship and being student, and it is more prevalent in males.

No significant relationships.

Research on the association between internet use and concerns about body image is still scarce.

To explore the associations between generalized problematic internet use, number of social networks, and appearance schemas.

216 Portuguese late adolescents (89.3% females), with a mean age of 18.62 years old (SD = .488, range: 18-19) filled in an internet patterns of use questionnaire, the Generalized Problematic Interne Use Scale 2 (GPIUS2) and The Appearance Schemas Inventory-Revised (ASI-R).

A total of 99.6% of the students use social networks. Subjects were divided into three groups (group1: 1-2 social networks; group 2: 3 social networks, and group 3: >3 social networks). There was a statistically difference in Motivational Salience scores (ASI-R) for the three groups [F (2, 503) = 6.0, p = .003]. Post-hoc comparisons indicated that the mean score for group 3 (M = 28.29, SD = 4.95) was significantly different from group 1 (M = 26.69, SD =4.55), and from group 2, (M = 26.87, SD =4.95). Generalized problematic internet subscales (Mood Regulation, Self-Deficient Regulation, and Negative Consequences) and total score were significantly correlated with both dimensions of ASI-R: Self-Evaluation Salience (coefficients varied from r = .31** to r = .47**) and Motivational Salience (from r = .14*, to r = .31**).

Generalized problematic internet use and the number of social networks are associated with adolescent’s cognitive-behavioural investment in one’s own appearance. Study carried out under the strategic project of the Centre for Philosophical and Humanistic Studies (CEFH) UID/FIL/00683/2019, funded by the FCT.

Perfectionism is a consistent risk factor for various psychopathological conditions, including psychological distress and eating disorders. Recently, we have shown, for the first time, that there is a relationship between perfectionism and generalized problematic internet use/GPIU (Sobral et al. 2020). Specifically, we found that the role of perfectionism in psychological disorder is partially mediated by GPIU. On the other hand, it has been suggested that the widespread use of digital media can lead to negative body image perception and abnormal eating attitudes and behaviors.

To explore, for the first time, the relationship between perfectionism, GPIU and disordered eating behavior.

475 university students (78.9% girls; mean age 20.22±1.695) answered the Portuguese validated versions of: Composite Multidimensional Perfectionism Scale, GPIU Scale and Eating Attitudes Test-25. SPSS and Hayes’ Process Macro (2020) were used.

Bulimic Behaviours/BB significantly and moderately correlated with Perfectionist efforts (r=.263), Perfectionist concerns (r=.284) and GPIU (r=.25) (all p<.001). The mediation analyses revealed that GPIU is a partial mediator of the relationship between both perfectionism dimensions and BB.

The evidence that both negative and “positive” perfectionism dimensions are associated to eating pathology is in line with our previous research. The present study adds, for the first time, that one of the perfectionism pathways of influence on BB operates through UGPI. Assessment and intervention to diminish eating psychopathology should focus on perfectionism and compulsive traits which could be involved in both ED and GPIU and in their comorbidity.

No significant relationships.