Code wars: Steganography,signals intelligence,and terrorism

This paper discusses the process of secret communication known as steganography. The argument advanced here is that terrorists are unlikely to be employing digital steganography to facilitate secret intra-group communication as has been claimed. This is because terrorist use of digital steganography is both technically and operationally implausible. The position adopted in this paper is that terrorists are likely to employ low-tech steganography such as semagrams and null ciphers instead. Her research interests are in the area of terrorism and the Internet. She has published in Current History, the Journal of Information Warfare, and elsewhere. Her research has been facilitated by a grant from the Irish Research Council for the Humanities and Social Sciences.     

Facial Expressions and the Ability to Recognize Emotions from the Eyes or Mouth: A Comparison Between Children and Adults

The authors sought to contribute to the literature on the ability to recognize anger, happiness, fear, surprise, sadness, disgust, and neutral emotions from facial information. They aimed to investigate if—regardless of age—this pattern changes. More specifically, the present study aimed to compare the difference between the performance of adults and 6- to 7-year-old children in detecting emotions from the whole face and a specific face region, namely the eyes and mouth. The findings seem to indicate that, for both groups, recognizing disgust, happiness, and surprise is facilitated when pictures represent the whole face. However, with regard to a specific region, a prevalence for children was not found between the eyes and mouth. Meanwhile, for adults, would seem to detect a greater role of the eye region. Finally, regarding the differences in the performance of emotions recognition, adults are better only in a few cases, whereas children are better in recognizing anger from the mouth.     

Estimating Group-Level Relationships: General Recommendations and Considerations for the Use of Intraclass Correlation Coefficients

Purpose

In this investigation, we argue for why and how available intraclass correlation coefficients and other types of reliability estimates can be employed as sample-based reliability estimates within primary and meta-analytic studies when relationships between group-level phenomena are of interest.

Design/Methodology/Approach

Group-level correlations and reliability estimates were obtained from 46 studies examining organizational climate–performance relationships. We illustrate how the group-level reliability estimates can be used to correct correlations for predictor and criterion unreliability. Procedures are presented for computing the sampling variances of individually corrected correlations that account for sampling error in the group-level reliability estimates.

Findings

Support was found for the conservative nature of meta-analytic parameter estimates when group-level reliability information is sample-based as opposed to assumed population values. In addition, our analyses indicated that conclusions about substantive relationships between group-level variables can change based on availability of sample-based reliabilities within both primary and meta-analytic studies.

Implications

Results from this study suggest that researchers should rely on sample-based meta-analytic procedures when examining the generalizability of group-level relationships. This study also demonstrates the importance of using all available reliability information and accounting for sampling error in the reliability estimates when conducting meta-analyses at the group level of analysis.

Originality/Value

This study breaks ground by systematically examining the use of intraclass correlation coefficients as reliability estimates within group-level meta-analytic studies. Furthermore, illustrative analyses provide guidance to primary and meta-analytic researchers in regard to how to correct group-level correlations for unreliability in the predictor, criterion, or both whenever and in whatever proportions the artifact information is available.

     

Preflexes and internal models in biomimetic robot systems

The next generation of neuroprostheses, which are aimed at the restoration of natural movement of paralysed body parts or at the natural interaction with external devices, will be quite similar to biomimetic robot systems which attempt to duplicate the organization of the biological motor control system. In the paper, we review some of the organizing principles that have emerged in the last few years and might provide useful guidelines for a biomimetic design.     

Asymmetric interference in implicit memory: effects of study-test awareness and stimulus order

This study examined the extent to which fragment completion performance is susceptible to the effects of two different forms of interference (proactive and retroactive) and whether any of these effects depend on participants' awareness of the relationship between study and test. Unaware participants were found to be susceptible to proactive but not retroactive interference. Aware participants did not show evidence of susceptibility to either form of interference. These results contribute to the debate about whether implicit memory is immune to interference effects by demarcating the limits of such an immunity.     

Stigma,Expressed Emotion,and Quality of Life in Caregivers of Individuals with Dementia

Expressed emotion (EE) is a measure of a caregiver's critical and emotionally overinvolved (EOI; e.g., intrusive, self‐sacrificing) attitudes and behaviors toward a person with a mental illness. Mounting evidence indicates that high levels of these critical and EOI attitudes and behaviors (collectively termed high EE) in family members are associated with a poorer course of illness for people with a range of disorders, including dementia (Nomura et al., 2005). However, less is known about factors that might trigger high EE and how high EE might impact dementia caregivers’ own mental health. In this study we propose that caregivers who perceive stigma from their relative's illness may be more likely to be critical or intrusive (high EOI) toward their relative in an attempt to control symptomatic behaviors. We further hypothesized that high EE would partially mediate the link between stigma and quality of life (QoL) as there is some evidence that high EE is associated with poorer mental health in caregivers themselves (Safavi et al., 2015). In line with study hypotheses and using a sample of 106 dementia caregivers, we found that greater caregiver stigma was associated with both high EE (for criticism and EOI) and with poorer QoL. Mediational analyses further confirmed that high EE accounts for much of the association between stigma and poorer QoL. Study results suggest that addressing caregiver stigma in therapy could reduce levels of high EE and indirectly therefore improve caregiver QoL. Intervening directly to reduce high EE could also improve caregiver QoL.     

Foster Care Chronicles: Use of the Arts for Teens Aging Out of the Foster Care System

This article describes the use of narrative and drama therapies as creative therapeutic interventions to engage and assist vulnerable youth. Foster Care Chronicles was a collaboration between a state university social work program and a local department of social services in a child welfare unit. This 2-year exploratory project employed an innovative approach to work with foster care youth, all of whom were within 2 years of “aging out” of care. The project utilized narrative therapy and drama therapy in a group setting by building on youths’ individual and collective strengths in writing, speaking, and acting. As these youth assessed their participation in this program, their reflections addressed developing aspects of self-image, self-healing, self-efficacy, and lessons learned.     

Agnes Arber: form in the mind and the eye

Agnes Arber (1879–1960) was a British botanist who was a leading plant morphologist during the first half of the 20th century. She also wrote on the history and philosophy of botany. I argue in this article that her philosophical work on form and on how the work of the mind and the eye relate to each other in morphological research are relevant to the science of today. Arber's unusual blend of interests—in botany, history, philosophy, and art—put her in a unique position to examine issues of form. Even her unorthodox ideas on evolution can now be seen as fitting in well with discussions of natural selection as the predominant engine of evolutionary change. Arber's views also throw light on present work dealing with developmental plant genetics and with the study of protein form. I will further argue that her marginal position relative to institutional science, while it may have left her vulnerable to criticism, also made possible her deep philosophical reflections on morphology.