Rich stimulus sampling for between-subjects designs improves model selection

The choice of stimulus values to test in any experiment is a critical component of good experimental design. This study examines the consequences of random and systematic sampling of data values for the identification of functional relationships in experimental settings. Using Monte Carlo simulation, uniform random sampling was compared with systematic sampling of two, three, four, or N equally spaced values along a single stimulus dimension. Selection of the correct generating function (a logistic or a linear model) was improved with each increase in the number of levels sampled, with N equally spaced values and random stimulus sampling performing similarly. These improvements came at a small cost in the precision of the parameter estimates for the generating function.     

Development and initial validation of the Adolescent Responses to Body Dissatisfaction Measure

One community sample (N = 607) of youths generated self-reported responses to body dissatisfaction, from which the Adolescent Responses to Body Dissatisfaction (ARBD) inventory was constructed. A 2nd, similar sample (N = 830) completed this measure as well as measures of coping, body dissatisfaction, body mass index, depressive symptoms, and disordered eating behaviors. Evidence of 6 ARBD factors emerged: Self-Acceptance, Compensatory Thinking, Diet/Exercise, Anxious Responding, Appearance Strategies, and Social Comparison. Subscales based on these factors provided evidence of convergent, discriminant, construct, and incremental validity. Sex and ethnic differences were also evident. Adolescents' use of Self-Acceptance and Compensatory Thinking strategies appeared to attenuate the relation between body dissatisfaction and psychopathology, whereas use of Diet/Exercise and Anxious Responding appeared to exacerbate this relation, especially in adolescents who were not overweight. The ARBD provides a window into potentially healthy and unhealthy ways in which adolescents cope with body dissatisfaction. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

Behavioural Investigative Advice: Assistance to Investigative Decision‐making in Difficult‐to‐detect Murder

This paper considers the role of a Behavioural Investigative Adviser (BIA) in assisting with the decision‐making of a Senior Investigating Officer (SIO) in difficult‐to‐detect murder investigations. It outlines the need for transparent evidence‐based decision‐making from both the SIO and the BIA. The paper then details a piece of relevant, applied research that can assist in this end. The research utilised a pragmatic psychology approach to analyse 312 detected murder cases from the Serious Crime Analysis Section database. Some significant patterns relating what is known about the offence at different stages of an investigation and inferences regarding the offender were found, indicating that certain offence information can lead to some reliable predictions and these can be refined as more information becomes available. However, the findings also indicate that base rate frequencies and a ‘best‐guess’ methodology may be as, if not more, useful than more complex statistical techniques when providing advice to investigations. Copyright © 2013 John Wiley & Sons, Ltd.     

The relation between electroencephalogram asymmetry and attention biases to threat at baseline and under stress

Electroencephalogram (EEG) asymmetry in the alpha frequency band has been implicated in emotion processing and broad approach-withdrawal motivation systems. Questions remain regarding the cognitive mechanisms that may help elucidate the observed links between EEG asymmetry and patterns of socioemotional functioning. The current study observed frontal EEG asymmetry patterns at rest and under social threat among young adults (N = 45, M = 21.1 years). Asymmetries were, in turn, associated with performance on an emotion-face dot-probe attention bias task. Attention biases to threat have been implicated as potential causal mechanisms in anxiety and social withdrawal. Frontal EEG asymmetry at baseline did not predict attention bias patterns to angry or happy faces. However, increases in right frontal alpha asymmetry from baseline to the stressful speech condition were associated with vigilance to angry faces and avoidance of happy faces. The findings may reflect individual differences in the pattern of response (approach or withdrawal) with the introduction of a mild stressor. Comparison analyses with frontal beta asymmetry and parietal alpha asymmetry did not find similar patterns. Thus, the data may reflect the unique role of frontal regions, particularly the dorsolateral prefrontal cortex, in cognitive control and threat detection, coupled with ruminative processes associated with alpha activity.     

‘So many women suffer in silence’: a thematic analysis of women’s written accounts of coping with endometriosis

Abstract

Objective: To understand women’s experiences of coping with endometriosis, and impact on their lives.

Design: Women accessed an online questionnaire through a U.K.-based endometriosis charity website.

Methods: Thirty-four women, aged 22–56 years, with self-reported medically-diagnosed endometriosis, 30 of whom were White, responded to open-ended questions, analysed using inductive thematic analysis.

Results: Participants spoke about their lives being a constant struggle, where they tried to maintain their personal and working lives whilst dealing with long-term pain. Women had to ‘battle’ for an accurate diagnosis, and had limited faith in health professionals. Coping strategies included avoidance of social events to conserve energy (self-pacing), and avoiding taking painkillers to retain alertness. Women did not feel able to be honest with family and friends about their symptoms, and felt socially isolated and misunderstood.

Conclusions: Implications for health professionals are discussed, including the need for earlier diagnosis and taking women’s symptoms more seriously at referral; understanding the need to conserve energy in the context of long-term pain; that not taking pain medication may be an active choice to retain alertness; and that avoiding being honest with friends and family and subsequent feelings of isolation may be common experiences relevant to designing treatment programmes.     

Characterizing the Musical Phenotype in Individuals With Williams Syndrome

Williams Syndrome (WS), a neurodevelopmental genetic disorder, is characterized by peaks and valleys in mental function: substantial impairments in cognitive domains such as reasoning, arithmetic ability, and spatial cognition, alongside relatively preserved skills in social domains, face processing, language, and music. We report the results of a comprehensive survey on musical behaviors and background administered to the largest sample of individuals with WS to date (n = 118, mean age = 20.4), and compare the results to those obtained from a control group of typically developing normal individuals (n = 118, mean age = 20.9) and two groups of individuals with other neurodevelopmental genetic disorders, Autism (n = 30, mean age = 18.2) and Down Syndrome (n = 40, mean age = 17.2). Individuals with WS were found to be rated higher in musical accomplishment, engagement, and interest than either of the comparison groups, and equivalent on most measures to the control group. Compared to all other groups including the controls, the WS individuals displayed greater emotional responses to music, manifested interest in music at an earlier age, and spent more hours per week listening to music. In addition, the effects of music listening (whether positive or negative) tended to last longer in the WS group. A factor analysis extracted seven principal components that characterize the musical phenotype in our sample, and discriminant function analysis of those factors was able to successfully predict group membership for the majority of cases. We discuss the neurobiological implications of these findings.     

Stakeholder Opinions and Ethical Perspectives Support Complete Disclosure of Incidental Findings in MRI Research

How far does a researcher’s responsibility extend when an incidental finding is identified? Balancing pertinent ethical principles such as beneficence, respect for persons, and duty to rescue is not always straightforward, particularly in neuroimaging research where empirical data that might help guide decision making are lacking. We conducted a systematic survey of perceptions and preferences of 396 investigators, research participants, and Institutional Review Board members at our institution. Using the partial entrustment model as described by Richardson, we argue that our data supports universal reading by a neuroradiologist of all research MRI scans for incidental findings and providing full disclosure to all participants.