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Long-term heavy cannabis use can result in memory impairment. Adolescent users may be especially vulnerable to the adverse neurocognitive effects of cannabis. In a cross-sectional and prospective neuropsychological study of 181 adolescents aged 16–20 (mean 18.3 years), we compared performance indices from one of the most widely used measures of learning and(More)
Reflection impulsivity—a failure to gather and evaluate information before making a decision—is a critical component of risk-taking and substance use behaviours, which are highly prevalent during adolescence. The Information Sampling Test was used to assess reflection impulsivity in 175 adolescents (mean age 18.3, range 16.5–20; 55% female)—48 cannabis(More)
OBJECTIVE We investigated the extent to which different forms of eating behavior as assessed by the Dutch Eating Behaviour Questionnaire are related to facets of the Big Five personality domains. METHOD Respondents were 167 psychology students (126 females and 41 males) who volunteered for the study. RESULTS Body mass index (BMI) and gender had(More)
This article assesses whether perceived parental style influenced the extent to which adolescents became increasingly conscientious and whether changes in conscientiousness influenced academic grades 1 year later. Parental styles, conscientiousness, verbal, and numerical ability at Time 1 were measured. One year later conscientiousness was again assessed,(More)
BACKGROUND Almost no research has examined the impact of explanatory style on social adjustment. We hypothesised that adolescents with a pessimistic style would be less likely to develop and maintain social support networks. METHODS Seven hundred and nineteen students (351 males and 366 females; 2 unknown; M(AGE) = 12.28, SD = .49) completed an anonymous(More)
Attention-Deficit/Hyperactivity Disorder (AD/HD) is the most common psychiatric disorder of childhood, but it is becoming increasingly more apparent that more than half the childhood sufferers will continue to manifest symptoms of the disorder as adults. While EEG coherence in children with AD/HD has been examined extensively, no studies have investigated(More)
Using three waves of data, we assessed the relationships between endorsement of religious values, some of the major personality dimensions, and social and emotional well-being amongst teenagers. Participants were 784 high school students at Time 1 (382 males and 394 females; 8 did not indicate their gender) and 563 provided data at each of Time 1, Time 2(More)
Attention-Deficit/Hyperactivity Disorder (AD/HD) is the most common psychiatric disorder of childhood, but it is becoming increasingly apparent that more than half the childhood sufferers will continue to manifest symptoms of the disorder as adults. While the EEG of children with AD/HD has been extensively examined, comparatively little research has been(More)
This research was designed to test the extent to which personality, environmental factors, and conventional behaviours predict drug-taking among a sample of Australian high school students. Respondents (n = 199; 101 females and 98 males) indicated the extent of their alcohol, tobacco and marijuana use. Correlational analyses showed broad support for the(More)
OBJECTIVE Personality dimensions are known to predict mortality and other health outcomes, but almost no research has assessed the effects of changes in personality traits on physical and mental health outcomes. In this article, we examined the effects of changes in the Big Five personality dimensions on health as assessed by the Short Form Health Survey(More)