Executive and motivational processes in adolescents with Attention-Deficit-Hyperactivity Disorder (ADHD)

BACKGROUND: The objective of the current study was to examine performance and correlates of performance on a decision-making card task involving risky choices (Iowa Gambling Task) in adolescents with ADHD and comparison controls. Forty-four participants with ADHD and 34 controls were administered measures of estimated intellectual ability, working memory, and the card task. Also, behavioural ratings were obtained from parents and teachers. RESULTS: Adolescents with ADHD scored lower on the measures of intellectual ability, working memory, and made less advantageous selections on the card task compared to controls. Performance on measures of intellectual ability and working memory were unrelated to card task performance in both the ADHD and control samples. Parent ratings of hyperactivity/impulsivity were significantly associated with card task performance in the adolescents with ADHD, but not in controls. CONCLUSION: These findings demonstrate impaired decision-making in adolescents with ADHD, and the separability of motivational and executive function processes, supporting current dual pathway models of ADHD

Estimations of Competence in Neurodevelopmental Conditions: A Review

Estimations of competence paradigms offer methods to help us measure how well we track our performance. Bridging across the clinical research and metacognitive research traditions, we identified the Positive Illusory Bias (PIB), metamemory and meta-reasoning paradigms for assessing estimation of competence in neurodevelopmental conditions. Overall, studies from PIB paradigms suggest that individuals with Attention-Deficit Hyperactivity Disorder, Autism, Intellectual Disability and Learning Disability tend to display a positive bias in their performance relative to other informants. In metamemory paradigms, individuals with these neurodevelopmental conditions tend to show more discrepancy between their subjective judgments and their memory performance relative to comparison controls, but these findings have been less consistent than for PIB. Meta-reasoning has been less well-studied across neurodevelopmental conditions. In order to advance our understanding of whether estimation of competence is a significant domain for understanding neurodevelopmental conditions, consideration must be given to conceptual models for each neurodevelopmental condition, methodological issues (paradigm selection and interpretation of self-report and subjective judgment) and developmental considerations

Estimations of Competence in Neurodevelopmental Conditions: A Review

Estimations of competence paradigms offer methods to help us measure how well we track our performance. Bridging across the clinical research and metacognitive research traditions, we identified the Positive Illusory Bias (PIB), metamemory and meta-reasoning paradigms for assessing estimation of competence in neurodevelopmental conditions. Overall, studies from PIB paradigms suggest that individuals with Attention-Deficit Hyperactivity Disorder, Autism, Intellectual Disability and Learning Disability tend to display a positive bias in their performance relative to other informants. In metamemory paradigms, individuals with these neurodevelopmental conditions tend to show more discrepancy between their subjective judgments and their memory performance relative to comparison controls, but these findings have been less consistent than for PIB. Meta-reasoning has been less well-studied across neurodevelopmental conditions. In order to advance our understanding of whether estimation of competence is a significant domain for understanding neurodevelopmental conditions, consideration must be given to conceptual models for each neurodevelopmental condition, methodological issues (paradigm selection and interpretation of self-report and subjective judgment) and developmental considerations

Adult attention deficit hyperactivity disorder symptom profiles and concurrent problems with alcohol and cannabis: Sex differences in a representative, population survey

Background: Adult attention deficit hyperactivity disorder (ADHD) shows a robust association with alcohol and cannabis misuse, and these relationships are expressed differently in males and females. Manifestation of specific ADHD symptom profiles, even in the absence of the full disorder, may also be related to problems with alcohol and cannabis, although these relationships have not been investigated in epidemiological studies. To address this question, we studied the sex-specific associations of ADHD symptomatology with problematic alcohol and cannabis use in a representative sample of adults aged 18 years and older residing in Ontario, Canada. Methods: Data were obtained from the Centre for Addiction and Mental Health Monitor, an ongoing cross-sectional telephone survey, between January 2011 and December 2013. Respondents (n = 5080) reported on current ADHD symptomatology, measured using the Adult ADHD Self-Report Version 1.1 Screener (ASRS-V1.1) and four additional items, and alcohol and cannabis use, which were measured using the Alcohol Use Disorders Identification Test (AUDIT) and the Alcohol, Smoking and Substance Involvement Screening Test (ASSIST), respectively. Logistic regression analyses were conducted in men and women to test the association of each ADHD symptom cluster (hyperactivity, inattentiveness, impulsivity) with problematic alcohol and cannabis use. Results: After controlling for age, education, and comorbid internalizing and externalizing psychopathology, hyperactive symptoms were associated with problematic alcohol use in both men and women and with problematic cannabis use in men. Impulsive symptoms were independently associated with problematic cannabis use in men. By contrast, inattentive symptomatology predicted problems with alcohol and cannabis only in women. In all models, age was negatively associated with substance misuse and externalizing behavior was positively correlated and the strongest predictor of hazardous alcohol and cannabis use. Conclusions: ADHD symptom expression in adulthood is related to concurrent hazardous use of alcohol and cannabis. Distinctive ADHD symptom profiles may confer increased risk for substance misuse in a sex-specific manner

Attention deficit hyperactivity disorder symptoms, comorbidities, substance use, and social outcomes among men and women in a canadian sample

Background. Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder that can persist in adolescence and adulthood. Aim. To examine prevalence of ADHD symptoms and correlates in a representative sample of adults 18 years and older living in Ontario, Canada. Method. We used the Centre for Addiction and Mental Health Monitor, an ongoing cross-sectional telephone survey, to examine the relationships between ADHD positive symptoms and comorbidities, substance use, medication use, social outcomes, and sociodemographics. Results. Of 4014 residents sampled in 2011-2012, 3.30% (2.75%-3.85%) screened positively for ADHD symptoms (women = 3.6%; men = 3.0%). For men, distress, antisocial symptoms, cocaine use, antianxiety medication use, antidepressant medication use, and criminal offence arrest were associated with positive ADHD screen. For women, distress, cocaine use, antianxiety medication use, antidepressant medication use, pain medication use, and motor vehicle collision in the past year were associated with positive ADHD screen. Conclusions. ADHD symptoms are associated with adverse medical and social outcomes that are in some cases gender specific

Adult attention deficit hyperactivity disorder symptom profiles and concurrent problems with alcohol and cannabis: Sex differences in a representative, population survey

Background: Adult attention deficit hyperactivity disorder (ADHD) shows a robust association with alcohol and cannabis misuse, and these relationships are expressed differently in males and females. Manifestation of specific ADHD symptom profiles, even in the absence of the full disorder, may also be related to problems with alcohol and cannabis, although these relationships have not been investigated in epidemiological studies. To address this question, we studied the sex-specific associations of ADHD symptomatology with problematic alcohol and cannabis use in a representative sample of adults aged 18 years and older residing in Ontario, Canada. Methods: Data were obtained from the Centre for Addiction and Mental Health Monitor, an ongoing cross-sectional telephone survey, between January 2011 and December 2013. Respondents (n = 5080) reported on current ADHD symptomatology, measured using the Adult ADHD Self-Report Version 1.1 Screener (ASRS-V1.1) and four additional items, and alcohol and cannabis use, which were measured using the Alcohol Use Disorders Identification Test (AUDIT) and the Alcohol, Smoking and Substance Involvement Screening Test (ASSIST), respectively. Logistic regression analyses were conducted in men and women to test the association of each ADHD symptom cluster (hyperactivity, inattentiveness, impulsivity) with problematic alcohol and cannabis use. Results: After controlling for age, education, and comorbid internalizing and externalizing psychopathology, hyperactive symptoms were associated with problematic alcohol use in both men and women and with problematic cannabis use in men. Impulsive symptoms were independently associated with problematic cannabis use in men. By contrast, inattentive symptomatology predicted problems with alcohol and cannabis only in women. In all models, age was negatively associated with substance misuse and externalizing behavior was positively correlated and the strongest predictor of hazardous alcohol and cannabis use. Conclusions: ADHD symptom expression in adulthood is related to concurrent hazardous use of alcohol and cannabis. Distinctive ADHD symptom profiles may confer increased risk for substance misuse in a sex-specific manner

Prediksi Kenaikan atau Penurunan Indeks Pasar Keuangan Indonesia dengan Menggunakan Bayesian Network

Investasi saham pada pasar keuangan dilakukan untuk meningkatkan aset pada masa depan. Dalam melakukan investasi harus mempertimbangkan hasil yang akan didapatkan atau biasa disebut return. Setiap investor akan berusaha mendapatkan return semaksimal mungkin dari investasi yang dilakukannya. Oleh karena itu, perlu dilakukan prediksi perubahan kenaikan atau penurunan pada pasar saham. Beberapa metode untuk membuat prediksi adalah Bayesian Network dan Algoritma Naive Bayes. Pada Tugas Akhir ini, dilakukan pemodelan jaringan sektor-sektor pasar keuangan Indonesia dengan menggunakan Bayesian Network, lalu melakukan prediksi berdasarkan kenaikan atau penurunan harga penutupan dari tiap sektor. Metode yang digunakan adalah menggunakan Algoritma Naive Bayes Diskrit dan Kontinu. Setelah itu, menentukan metode yang terbaik untuk perhitungan prediksi dengan melihat tingkat akurasi dari setiap metode dengan confusion matrix. Sektor pasar keuangan yang digunakan yaitu nilai tukar USD/IDR, IHSG, dan Obligasi. Perhitungan dilakukan berdasarkan ketergantungan antara nilai tukar USD/IDR terhadap IHSG, dan nilai tukar USD/IDR terhadap Obligasi. Metode Naive Bayes Diskrit menunjukan hasil yang lebih akurat dengan akurasi sebesar 84% untuk IHSG dan 76% untuk Obligasi. Sedangkan perhitungan dengan metode Naive Bayes Kontinu memiliki akurasi sebesar 52% untuk IHSG dan 48% untuk Obligasi. Sektor nilai tukar USD/IDR lebih mempengaruhi IHSG, karena tingkat akurasi yang diperoleh IHSG lebih tinggi dibandingkan dengan Obligasi

Domain generality and individual differences in disjunctive thinking

grantor: University of TorontoDisjunctive thinking is an essential and ubiquitous critical thinking skill. The framework used to examine disjunctive thinking was taken from Shafir (1994), who termed disjunctive thinking as the tendency to consider all of the possible states of the world and to evaluate the consequences of each. Shafir (1994) argued that people are typically reluctant to think through disjunctions, and a failure to reason disjunctively is a violation of one of the most basic principles of rational choice, called Savage's Sure Thing Principle. Data from one hundred and twenty-five participants (47 males and 78 females) was examined on a set of formal and informal tasks, taken from the reasoning and decision-making literatures. It was found that 21% to 86% of participants failed to reason disjunctively on the formal tasks. Evidence for a failure to reason disjunctively was also found on one informal reasoning task, called The Argument Generation Task. There was some small support for the domain generality of a disjunctive thinking skill in the formal reasoning problems, and for a generational fluency in the informal tasks. However, the formal reasoning, formal decision-making, and informal tasks were virtually unrelated, providing support for domain specificity in the problems used here to investigate disjunctive thinking. The individual difference measures of cognitive ability and thinking dispositions were found to predict performance on some of the formal tasks. In particular, the dispositional measures: the Need for Cognition Scale and errors on the Matching Familiar Figures Test, were found to explain unique variance on some of the formal problems. These findings provide support for malleable, dispositional explanations of performance on the formal tasks. The implications of these findings are discussed in terms of the Generic Dual Process Framework (Stanovich, 1999; Stanovich & West, 2000).Ph.D