Bayesian testing of an exponential point null hypothesis

The problem of testing a point null hypothesis involving an exponential mean is The problem of testing a point null hypothesis involving an exponential mean is usual interpretation of P-values as evidence against precise hypotheses is faulty. As in Berger and Delampady (1986) and Berger and Sellke (1987), lower bounds on Bayesian measures of evidence over wide classes of priors are found emphasizing the conflict between posterior probabilities and P-values. A hierarchical Bayes approach is also considered as an alternative to computing lower bounds and “automatic” Bayesian significance tests which further illustrates the point that P-values are highly misleading measures of evidence for tests of point null hypotheses.     

Relations between Temperament and Anger Regulation over Early Childhood

Theory suggests temperamental reactivity [negative affectivity (NA)] and regulation [effortful control (EC)] predict variation in the development of emotion regulation (ER). However, few studies report such relations, particularly studies utilizing observational measures of children's ER behaviors in longitudinal designs. Using multilevel modeling, the present study tested whether (1) between‐person differences in mean levels of mother‐reported child NA and EC (aggregated across age) and (2) within‐person changes in NA and EC from the ages of 18 to 42 months predicted subsequent improvements in laboratory‐based observations of children's anger regulation from the ages of 24 to 48 months. As expected, mean level of EC (aggregated across age) predicted longer latency to anger; however, no other temperament variables predicted anger expression. Mean level of EC also predicted the latency to a child's use of one regulatory strategy, distraction. Finally, decreases in NA were associated with age‐related changes in how long children used distractions and how quickly they bid calmly to their mother. Implications for relations between temperament and anger regulation are discussed in terms of both conceptual and methodological issues.     

A note on expressing wilks’ a as the product of independent beta variables

The purpose of this note is to show that the null distribution of Wilks’ A can be expressed as the product of p independent beta variables regardless of the relationship of p and q, where p is the number of variables and q is the degrees of freedom associated with the hypothesis.     

Supporting the Participation of Disabled Children and Young People in Decision‐making

Increasing children's and young people's participation in decisions, about their own care and about service development, is a policy priority. Although in general participation is increasing, disabled children are less likely to be involved than non‐disabled children and it is unclear to what extent children with complex needs or communication impairments are being included in participation activities. This article presents research exploring factors to support good practice in participation and discusses policy and practice implications.     

Roots of Futility,by Norman A. Polansky,Robert D. Borgman,and Christine De Saix. Jossey-Bass,San Francisco, 1972. $9.50 Hardbound. 288 Pages

Abstract

This paper describes a study of first year graduate social work students' work in practica and assesses their transfer of practice evaluation knowledge and skills from the classroom to the field. The data are drawn from case material recorded by the students using a structured recording format. The paper addresses three central questions. What were the salient features of the students' practices? Did students apply practice evaluation knowledge to their work with clients? And, what variables influenced the ways that the students practiced? Recommendations for enhancing class and field integration and for increasing knowledge and skill transfer given the significant influence of the practicum instructor's orientation are discussed.     

College Smoking Policies and Smoking Cessation Programs: Results of a Survey of College Health Center Directors

Abstract

College students' cigarette smoking rose dramatically during the 1990s. Little is known about what colleges do to address the problem. Health center directors at 393 4-year US colleges provided information (response rate: 65.1%) about college policies addressing smoking and the availability of smoking cessation programs. Of the health center directors surveyed, 85% considered students' smoking a problem; yet only 81% of colleges prohibit smoking in all public areas and only 27% ban smoking in all indoor areas, including students' rooms in dormitories and in private offices. More than 40% of the respondents reported that their schools did not offer smoking cessation programs and that the demand for existing program was low. Colleges need to do more to discourage student tobacco use. Recommended actions include campus-wide no-smoking policies that apply to student residences and identification of new ways of providing smoking prevention and cessation services.     

Ecological Invalidity of Existing Gaydar Research: In-Lab Accuracy Translates to Real-World Inaccuracy: Response to Rule,Johnson, & Freeman (2016)

In recent years, several empirical studies have claimed to provide evidence in support of the popular folk notion that people possess “gaydar” that enables them to accurately identify who is gay or lesbian (Rule, Johnson, & Freeman, 2016). This conclusion is limited to artificial lab settings, however, and when translated to real-world settings this work itself provides evidence that people’s judgments about who is gay/lesbian are not pragmatically accurate. We also briefly review evidence related to the consequences of perpetuating the idea of gaydar (i.e., “the gaydar myth”). Although past claims about accurate orientation perception are misleading, the work that gave rise to those claims can nevertheless inform the literature in meaningful ways. We offer some recommendations for how the evidence in past “gaydar” research can be reappraised to inform our understanding of social perception and group similarities/differences.