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.     

The effects of torture-related injuries on long-term psychological distress in a Punjabi Sikh sample

Torture survivors often report chronic debilitating physical and psychological distress. Prior research on the relationship between physical and psychological trauma suggests that the 2 are not independent. Injury sustained during torture may increase the likelihood of subsequent distress as either a moderator or mediator. For long-term psychopathology in a sample of Punjabi Sikh survivors of human rights violations (N = 116), chronic injuries mediated the path between torture and posttraumatic stress disorder, specifically the severity of numbing symptoms. Although injuries were associated with major depression, torture was not, and injuries did not moderate the relationship between major depression and torture. Chronic injuries may represent trauma severity or persistent traumatic cues. These findings emphasize connections between physical and psychological trauma and the importance of an interdisciplinary approach to torture treatment.     

Adolescent Coping and Neighborhood Violence: Perceptions, Exposure, and Urban Youths' Efforts to Deal with Danger

Neighborhood violence is a persistent source of danger, stress, and other adverse outcomes for urban youth. We examined how 140 African American and Latino adolescents coped with neighborhood danger in low, medium, and high crime neighborhoods throughout Chicago. Participants reported using a range of coping strategies (measured via a modified version of the Ways of Coping Scale; R. S. Lazarus & S. Folkman, 1984). In low and medium crime rate areas, using confrontive strategies was significantly correlated with increased exposure to violence, and no strategies were associated with perceptions of safety. Coping strategies were associated with perceived safety to a substantial degree only in high crime neighborhoods, and none were associated with exposure to violence. A k means cluster analysis identified groups that differed in coping profiles and varied in rates of exposure to violence. Moderating effects of gender, ethnicity, and neighborhood were found for both person level and variable level analyses.     

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 reality of the past versus the ideality of the future: emotional valence and functional differences between past and future mental time travel

Mental time travel (MTT) is the ability to mentally project oneself backward or forward in time in order to remember an event from one’s personal past or to imagine a possible event in one’s personal future. Past and future MTT share many similarities, and there is evidence to suggest that the two temporal directions rely on a shared neural network and similar cognitive structures. At the same time, one major difference between past and future MTT is that future as compared to past events generally are more emotionally positive and idyllic, suggesting that the two types of event representations may also serve different functions for emotion, self, and behavioral regulation. Here, we asked 158 participants to remember one positive and one negative event from their personal past as well as to imagine one positive and one negative event from their potential personal future and to rate the events on phenomenological characteristics. We replicated previous work regarding similarities between past and future MTT. We also found that positive events were more phenomenologically vivid than negative events. However, across most variables, we consistently found an increased effect of emotional valence for future as compared to past MTT, showing that the differences between positive and negative events were larger for future than for past events. Our findings support the idea that future MTT is biased by uncorrected positive illusions, whereas past MTT is constrained by the reality of things that have actually happened.     

Atomistic simulations of cross-slip of jogged screw dislocations in copper

We have performed atomic-scale simulations of cross-slip processes of screw dislocations in copper, simulating jog-free dislocations as well as different types of jogged screw dislocations. Minimum-energy paths and corresponding transition state energies are obtained using the nudged-elastic-band path technique. We find low barriers and effective masses for the conservative motion along the dislocations of elementary jogs on both ordinary {111}<110> and nonoctahedral {110}<110> slip systems. The jogs are found to be constricted and therefore effectively act as pre-existing constrictions; the cross-slip activation energy is thereby dramatically reduced, yielding values in agreement with experiment.     

The New Norwegian "KRL" Subject and Religious Freedom: A Report

The topic of this essay is the literary style of the words of Jesus in the gospels. My concern is the relevance of this issue for our conception of the teaching of the historical Jesus.