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Objectives: The aim of this study was to evaluate impulsivity, inhibitory control, and alcohol use in preadolescents and adolescents aged 10 to 16 from public and private schools., Methods: Participants were 190 adolescents selected from public and private schools in Brazil. Neuropsychological measures related to impulsivity (i.e., Barratt Impulsiveness Scale), inhibitory control (i.e., Go/No-go Task), and processing speed (i.e., Five Digits Test) were assessed., Results: 60% of the sample had started drinking alcohol. Early alcohol consumption is not influenced by type of school, indicating that adolescents consume alcohol early, regardless of the type of education or income. Although there were significant differences in neuropsychological performance between types of schools, better neuropsychological performance was found in students from private schools., Conclusions: When comparing consumption of alcohol among public and private school students, there were no significant differences, perhaps because the use of early alcohol can be a public health problem. Private school students may perform better in inhibitory control task because they have a good school environment, which serves as a protective factor.

Objective: investigate impulsivity levels and inhibitory control in women crack users and explore the relationships between impulsivity and inhibitory control., Method and Design: 52 healthy women (M = 32.83 years; SD = 9.54) and 46 crack cocaine users (M = 31.02 years; SD = 7.73), in abstinence, performed the assessment protocol included a Sociodemographic Data Questionnaire, Mini-Mental State Examination (MMSE), a GO/No-Go Task and the Barratt Impulsiveness Scale-11 (BIS-11). It was a quantitative research with cross-sectional design and control group., Results: crack group showed higher levels of impulsivity in all domains when compared to the control group (crack group M = 76.39, SD = 11.39, control group M = 58.53, SD = 10.76, p <.01). Participants from the crack group presented a significantly higher total reaction time in the Go-NoGo task (F(1,93) = 9.93, p =.002; effect size =.09, observed power =.87) and significantly more commission (F(1,93) = 7.20, p =.009; effect size =.07, observed power =.75) and omission errors (F(1,93) = 6.04, p =.01; effect size =.06, observed power =.68), in Go/NoGo Task. Groups did also significantly differ on total standard deviations suggesting that variability in total reaction time was significantly greater in the crack group. Results showed that only in the crack group there were significant correlations between Go-NoGo parameters and Barratt Impulsiveness Scale., Conclusions: Our findings are consistent that impulsivity and inhibitory control are closely linked to crack use in women. Future studies should consider to evaluate crack users in different withdrawal times, controlling the impact of abstinence time in the variables studied.