Use of the mathematical principle of inversion in young children

An important issue in the development of mathematical cognition is the extent to which children use and understand fundamental mathematical concepts. We examined whether young children successfully use the principle of inversion and, if so, whether they do so based on qualitative identity, length, or quantity. Twenty-four preschool children and 24 children in Grade 1 were presented with three-term inversion problems (e.g., 3+2-2) and standard problems of similar magnitude (e.g., 2+4-3). Problems were presented in three conditions to determine whether children used inversion at all and, if so, whether their decisions were based on quantitative or nonquantitative features of the problems. Both preschool and Grade 1 children showed evidence of using inversion in a fully quantitative manner, indicating that this principle is available in some form prior to extensive formal instruction in arithmetic.     

The Case of Vipul Bhrigu and the Federal Definition of Research Misconduct

The Office of Research Integrity found in 2011 that Vipul Bhrigu, a postdoctoral researcher who sabotaged a colleague’s research materials, was guilty of misconduct. However, I argue that this judgment is ill-considered and sets a problematic precedent for future cases. I first discuss the current federal definition of research misconduct and representative cases of research misconduct. Then, because this case recalls a debate from the 1990s over what the definition of “research misconduct” ought to be, I briefly recapitulate that history and reconsider the Bhrigu case in light of that history and in comparison to other cases involving tampering. Finally, I consider what the aim of a definition of research misconduct ought to be, and argue that the precedent set by the reasoning in this case is problematic.     

Characteristics,Properties and Ethical Issues of Carbon Nanotubes in Biomedical Applications

The field of nanotechnology and nanoscience is growing rapidly in many areas of research, from electronics to biomedicine to material science. Carbon nanotubes are receiving a lot of attention in the research due to their unique properties and many possible applications. This new material is a good example of how nanotechnology provides us with new opportunities, but at the same time leaves us a lot of unknowns to deal with. In order to deal with the unknowns we need to consider both the science and the ethics of the different applications of this novel material. Nanoethics is the study of the ethical issues in nanotechnology. It is a relatively new field of study and a lot of different methods have been suggested in this area. In this article a method is suggested combining an existing ethical theory with a practical approach in order to do a case study of the ethical considerations of using carbon nanotubes in biomedicine. For the case study to be of practical significance the scientific characteristics and properties of carbon nanotubes are reviewed to give the reader an overview of the research field.     

Coming Attractions: Parental Mediation Responses to Transgender and Cisgender Film Trailer Content Targeting Adolescents

Adolescents increasingly rely on media for socialization and identity development, and marketing plays a prominent role in this dynamic. Film trailers are one form of advertising that children actively seek out and attend to in their exploration of media. However, little attention has been paid to these advertisements’ gendered narratives and parents’ responses to them. The present study examines parents’ mediation responses to film trailers that promote themes of gender development and are aimed at adolescents. Respondents viewed a trailer that featured either a cisgender or transgender coming-of-age story and responded to cognitive, emotional, and attitudinal survey measures. Results identified both parent and child factors that influence parents’ mediation intentions and support for censorship. Practical implications in parenting, gender development, and marketing are further discussed.     

Predicting depression, anxiety and self-harm in adolescents: The role of perfectionism and acute life stress

Despite the growing evidence that perfectionism is associated with adolescent psychological distress, few studies have investigated this relationship prospectively with measures designed for use in adolescent populations. In the present study, within a diathesis-stress framework, we investigated the extent to which perfectionism and acute life stress predict depression, anxiety and self-harm among adolescent school children (n = 515) over a 6 month period (Time 1-Time 2). Socially prescribed perfectionism (SPP), self-oriented perfectionism-critical (SOP-critical) and the associated interactions with acute life stress differentially predicted anxiety, depression and self-harm. Acute life stress was an independent predictor of depression, anxiety and self-harm. SPP predicted depression and interacted with acute life stress to predict self-harm. SOP-critical and the SOP-critical by acute life stress interaction predicted anxiety. Self-oriented perfectionism-striving (SOP-striving) did not predict any of the Time 2 measures of distress. The dimensions of perfectionism are differentially associated with psychological distress. Tailored clinical interventions focused on adolescent perfectionism should offer promise in tackling psychological morbidity in adolescence.     

Downsizing obesity: On Ancel Keys,the origins of BMI,and the neglect of excess weight as a health hazard in the United States from the 1950s to 1970s

In 1972 Body Mass Index, BMI was put forth by physiologist Ancel Keys in his analysis of Seven Countries Study heart disease epidemiological data as the best available measure of obesity. This work culminated more than 20 years of effort by Keys to discredit the accepted measure of obesity, weight relative to height, along with a major public health campaign in the United States to fight heart disease through weight control. Here, I retrace his campaign to replace weight as a measure of obesity and analyze its methodology and relationship to the broader research field of heart disease epidemiology. I also explore why the epidemiological community accepted BMI despite Keys's failure to demonstrate that either it or adiposity (body fat content), were superior as predictors of heart disease—one of the Seven Countries Study's central aims.     

Psychopathy in a forensic sample – the factor structure of the PCL:SV in a Danish forensic sample

The research literature reveals an ongoing debate regarding the most appropriate conceptualization of psychopathic personality disorder. Specifically, it is discussed to what degree antisocial behavior is part of the conceptualization of the psychopathy construct and what constitutes the best factor model of the Psychopathy Checklist scales. The aim of the present study is to consider the underlying factor structure of the PCL:SV (Psychopathy Checklist Screening Version) in a Danish sample as well as considering the role of antisocial behavior in the psychopathy construct. Data from a Danish forensic patient sample (N = 225) was used and item response theory (IRT), aonfirmatory factor analyses (CFA) and structural equations model (SEM) analyses were carried out. Overall, the findings suggest appropriate item and model fit for the PCL:SV as well as superiority of the three‐factor model over the four‐factor model. The results are discussed in relation to the broader concept of personality disorder as well as clinical practice in regards to violence risk assessments and treatment of psychopathy.