Agenda Setting and the Blogosphere: An Analysis of the Relationship between Mainstream Media and Political Blogs

This paper asks: what is the relationship between the mainstream media and blog agendas? To be more precise, this paper tracks media coverage and blog discussion of 35 issues during the 2004 presidential campaign to test the hypothesis that the mainstream media agenda exerts a substantial impact on the blog agenda against the increasingly popular hypothesis that the blog agenda exerts a strong influence on the mainstream media agenda. Using a computer‐assisted, quantitative content analysis of ten randomly selected A‐list political blogs and 50 randomly selected, less popular political blogs over the five‐month period from July 1 to November 30, 2004, the author finds that on the vast majority of issues there was a complex, bidirectional relationship between mainstream media coverage and blog discussion rather than a unidirectional media or blog agenda‐setting effect.     

Evaluating the effects of birth complications on low self-control in a sample of twins

Gottfredson and Hirschi's general theory has generated an abundance of research examining the effects of low self-control on crime and analogous behaviors. Less research, however, has focused on the factors that contribute to the development of low self-control. Gottfredson and Hirschi maintain that ineffective parents are the sole cause for the emergence of low self-control. At the same time, they disregard the possibility that low self-control has a biological or genetic component. This article extends prior research and examines the effects of birth complications and parental involvement on low self-control. Using a sample of twin children, the authors find that parental involvement is only weakly and inconsistently related to low self-control. On the other hand, although most of the birth complications had no appreciable effect on low self-control, anoxia (oxygen starvation) emerged as the strongest and most consistent predictor of low self-control.     

Quantitative analysis of multiple illicit drugs in preserved oral fluid by solid-phase extraction and liquid chromatography-tandem mass spectrometry

We present a validated method for the simultaneous analysis of basic drugs which comprises a sample clean-up step, using mixed-mode solid-phase extraction (SPE), followed by LC-MS/MS analysis. Deuterated analogues for all of the analytes of interest were used for quantitation. The applied HPLC gradient ensured the elution of all the drugs examined within 14 min and produced chromatographic peaks of acceptable symmetry. Selectivity of the method was achieved by a combination of retention time, and two precursor-product ion transitions for the non-deuterated analogues. Oral fluid was collected with the Intercept, a FDA approved sampling device that is used on a large scale in the US for workplace drug testing. However, this collection system contains some ingredients (stabilizers and preservatives) that can cause substantial interferences, e.g. ion suppression or enhancement during LC-MS/MS analysis, in the absence of suitable sample pre-treatment. The use of the SPE was demonstrated to be highly effective and led to significant decreases in the interferences. Extraction was found to be both reproducible and efficient with recoveries >76% for all of the analytes. Furthermore, the processed samples were demonstrated to be stable for 48 h, except for cocaine and benzoylecgonine, where a slight negative trend was observed, but did not compromise the quantitation. In all cases the method was linear over the range investigated (2-200 microg/L) with an excellent intra-assay and inter-assay precision (coefficients of variation <10% in most cases) for QC samples spiked at a concentration of 4, 12 and 100 microg/L. Limits of quantitation were estimated to be at 2 microg/L with limits of detection ranging from 0.2 to 0.5 microg/L, which meets the requirements of SAMHSA for oral fluid testing in the workplace. The method was subsequently applied to the analysis of Intercept samples collected at the roadside by the police, and to determine MDMA and MDA levels in oral fluid samples from a controlled study.     

Bayesian Factor Analysis for Mixed Ordinal and Continuous Responses

Many situations exist in which a latent construct has both ordinaland continuous indicators. This presents a problem for the appliedresearcher because standard measurement models are not designedto accommodate mixed ordinal and continuous data. I addressthis problem by formulating a measurement model that is appropriatefor such mixed multivariate responses. This model unifies standardnormal theory factor analysis and item response theory modelsfor ordinal data. I detail a Markov chain Monte Carlo algorithmfor model fitting. I apply the model to cross-national dataon political-economic risk and find that the model works well.Software for fitting this model is publicly available in theMCMCpack (Martin and Quinn 2004, "MCMCpack 0.4–8") R package.     

Impulsivity in Juvenile Delinquency: Differences Among Early-Onset, Late-Onset, and Non-Offenders

The present research investigated differences in levels of impulsivity among early-onset, late-onset, and non-offending adolescents. 129 adolescents (114 males, 15 females), of whom 86 were institutionalised (M age=15.52 years) and 43 were regular school students (M age=15.40 years) participated. Each participant completed the Adapted Self-Report Delinquency Scale, Stroop Colour and Word Test, Time Perception task, Accuracy Game, Risk-Taking Game, and the Eysenck Impulsiveness Questionnaire. Results suggest that adolescents who display rapid cognitive tempo, poor mental inhibitory control, and high impulsivity are more likely to be early-onset offenders. Offender and non-offender groups showed significant differences on several measures of impulsivity, which may suggest that late-onset offenders acquire or exacerbate impulse-related problems through social mimicry of early-onset offender peers. Potentially important implications for our understanding of delinquency and the design and provision of prevention programs are highlighted.Senior Lecturer in Educational Psychology at the School of Education, The University of Queensland, Brisbane, Australia. She received her PhD in educational psychology from The University of Western Australia. Her major research interests include at-risk behaviours of children and adolescents, self-regulation and goal setting, and developmental trajectories of antisocial and aggressive behaviours School of Education, The University of Queensland, Brisbane Q 4072 AustraliaDoctor of Clinical Psychology student within the School of Psychology at The University of Queensland, Brisbane, Australia. Her research interests include at-risk children and adolescents, mental health in adolescents and adults, cognitive-behavioural interventions, and self-regulationMaster of Philosophy student within the School of Education, The University of Queensland, Brisbane, Australia. Her research interests include self-regulation, youth at-risk, Indigenous youth issues, and prevention and intervention approachesProfessor of Education and Head of the School of Education, The University of Queensland, Brisbane, Australia. He received his PhD in educational psychology from the University of Alberta, Canada. His research interests include cognitive educational psychology, classroom-based instruction, strategy training, problem solving, and at-risk youthProfessor of Education and Director, Centre for Attention and Related Disorders at the Graduate School of Education, The University of Western Australia. He received his PhD in educational psychology from the University of Birmingham, UK. His research interests include attentional disorders, severe antisociality in children and adolescents, emotion regulation, complex information processing and cognitive processes of at-risk adolescents Graduate School of Education, The University of Western, AustraliaProfessor of Psychology in the Department of Psychology, University of Strathclyde, United Kingdom. He received his PhD in developmental psychology, specialising in cognitive and communicative development in childhood and adolescence from Cambridge University, UK. His research interests include developmental psychology, at-risk children and adolescents, and the impact of media on children’s behaviour     

Affective determinants of treatment engagement in violent offenders

Affective factors are likely to play a major role in determining the extent to which offenders are able to engage with, and benefit from, treatment. In this article, it is argued that the relationship between affect and treatment engagement may be understood in three ways: the access the client has to emotional states, the ability to express such states, and the willingness of the client to do this in the therapeutic session. It is suggested that affective determinants of treatment readiness can be understood with reference to models of emotional regulation and that attention to these affective factors in the early stages of treatment is likely to promote engagement, reduce attrition, and consequently improve treatment outcomes for violent offenders.