A note on glejser's test for heteroscedasticity

Glejser published a test on the residuals of a regression model where the parameters are estimated by OLS that purports to detect “mixed” heteroscedasticity. This note addresses the problem of detecting this type heteroscedasticity from,both a theoretical and pragmatic point of view. We conclude that “mixed” heteroscedasticity cannot be separated from non zero expected errors and thus cannot be detected using Glejser s technique.     

Reflexivity and ethical research practice while interviewing on sexual topics

Reflexivity is a multimodal research feature that relies on the researcher’s subjectivity and self-awareness. This paper discusses uses of reflexivity when carrying out qualitative in-depth interviews on sexual topics. Through extracts of a challenging interview, where the challenge comes in the form of sexualised provocation from one man to another, this paper considers the benefits of using reflexivity to address emerging complexities in the interview process. The discussion focuses on ethical research practice through the lens of three forms of reflexivity: (1) reviewing the values that underpin a research project, with emphasis on the tension between rationality and intuition; (2) emotional self-awareness and self-care; and (3) recognition of the power dynamics in the researcher-participant relationship. Reflexivity promotes an intuition-informed decision-making process as a means to achieve ethical practice and conduct interviews with sensitivity and proficiency.     

Newsletters for Networks

Abstract

In the previous installment of this column, Donnice Cochenour wrote about Project Muse, Johns Hopkins University Press's project to provide electronic access to its journals. This column will explore OCLC's collaboration with publishers who are making traditional print publications available electronically. Serials Review interviewed Andrea Keyhani, Manager of Electronic Publishing at OCLC, about traditional print publishers' interests in electronic distribution of journals, OCLC's solution to publishers' migration to electronic distribution, enhancements to their Guidon software, and libraries' costs and archive concerns.     

Central American regional integration in science,technology and innovation: a new challenge

In recent years in international cooperation policies and public policies of the Central American (CA) region multilateral mechanisms were generated to form interinstitutional networks that drive science, technology, and innovation (STI) as the engine for regional economic growth. In the agreements social, political, and economic disparity were taken into account in order to stimulate the articulation between actors and potentialize local strengths to generate critical mass on the level of knowledge and build a research core base. The aim of this article is to identify institutional and productive capacities acquired in the countries of the region (CA) that encourage interaction on a national level and create favorable conditions to generate regional agreements to build regional interaction on STI. Results show deficiencies in the linking between public and private agents derived from the limited funds destined to I+D, the insufficient channels of information and the lack of interest of the investigations to respond to priority problems of the region, which weaken links with the productive sector. From there, arise the need to build a joint and collaborative work agenda to consolidated the institutional environment and favors the capacities to absorb knowledge.     

Cut-points to prevent low back injury due to force exertion at work

Force exertion is related to low back injuries (LBI). This paper critically reviews the literature concerning cut-points for back force exertion, presents available guidelines in a concise manner, and identifies areas that need further research. The studies reviewed were grouped according to the criteria used to set the cut-point values. Most often cut-points differ than concur. The approach considering physiological, psychophysical, epidemiological, and biomechanical aspects of back force exertion meets the most known criteria and presents the lowest common denominator of instantaneous load for lifting tasks. Further experimental and epidemiological studies in peak load and cumulative exposure are necessary. Compound indices should also be developed for pushing, pulling, and carrying. Future indices should consider electromyographically determined fatigue, differential viscoelastic properties of tissues, aging, and the cross sectional area of back muscles. We hope that this paper contributes to a more systematic appraisal of back force exertion at work.     

Integrating mailed personalized feedback and alcohol screening events: a feasibility study

This study characterized a sample of college students attending National Alcohol Screening Day (NASD), and tested the feasibility of using NASD as a platform for initiating the delivery of mailed personalized feedback forms. Participants (N = 153, 65% female) attended NASD and completed the Alcohol Use Disorders Identification Test (AUDIT [1]). A subset of at-risk drinkers completed additional questionnaires about their alcohol use and received personalized feedback through the mail. Thirty-four percent of the participants scored above the recommended clinical cutoff on the AUDIT. Men reported higher levels of alcohol consumption and alcohol-related negative consequences. The subset of at-risk drinkers reported frequent occasions of binge drinking and relatively high blood alcohol concentrations (BAC). NASD is an effective way of identifying college students with clinically significant levels of alcohol use, and provides an efficient mechanism for initiating the delivery of personalized feedback. More research on the combined effects of NASD and personalized feedback is warranted.     

Setting course: the case for the credentialing of forensic interviewers

The article provides a history of efforts to develop a credentialing or certification process for forensic interviewers and reviews the multitiered credentialing process offered by the National Association of Certified Child Forensic Interviewers. The authors argue the benefits of a credentialing process for forensic interviewers and respond to the arguments commonly made against the credentialing of forensic interviewers.     

Developmental Differences in Infants' Attention to Social and Nonsocial Threats

Research has demonstrated that humans detect threatening stimuli more rapidly than nonthreatening stimuli. Although the literature presumes that biases for threat should be normative, present early in development, evident across multiple forms of threat, and stable across individuals, developmental work in this area is limited. Here, we examine the developmental differences in infants' (4‐ to 24‐month‐olds) attention to social (angry faces) and nonsocial (snakes) threats using a new age‐appropriate dot‐probe task. In Experiment 1, infants' first fixations were more often to snakes than to frogs, and they were faster to fixate probes that appeared in place of snakes vs. frogs. There were no significant age differences, suggesting that a perceptual bias for snakes is present early in life and stable across infancy. In Experiment 2, infants fixated probes more quickly after viewing any trials that contained an angry face compared to trials that contained a happy face. Further, there were age‐related changes in infants' responses to face stimuli, with a general increase in looking time to faces before the probe and an increase in latency to fixate the probe after seeing angry faces. Together, this work suggests that different developmental mechanisms may be responsible for attentional biases for social vs. nonsocial threats.     

Manual bamboo cutting tool

The paper presents the development of a cutting tool guide, specifically for the harvest of bamboo. The development was made based on precepts of eco-design and ergonomics, for prioritizing the physical health of the operator and the maintenance of the environment, as well as meet specific requirements of bamboo. The main goal is to spread the use of bamboo as construction material, handicrafts, among others, from a handy, easy assembly and material available tool.