Edge-enhanced disruptive camouflage impairs shape discrimination

Disruptive colouration (DC) is a form of camouflage comprised of areas of pigmentation across a target’s surface that form false edges, which are said to impede detection by disguising the outline of the target. In nature, many species with DC also exhibit edge enhancement (EE); light areas have lighter edges and dark areas have darker edges. EE DC has been shown to undermine not only localisation but also identification of targets, even when they are not hidden (Sharman, Moncrieff, & Lovell, 2018). We use a novel task, where participants judge which “snake” is more “wiggly,” to measure shape discrimination performance for three colourations (uniform, DC, and EE DC) and two backgrounds (leafy and uniform). We show that EE DC impairs shape discrimination even when targets are not hidden in a textured background. We suggest that this mechanism may contribute to misidentification of EE DC targets

Dissociating the effect of disruptive colouration on localisation and identification of camouflaged targets

Disruptive camouflage features contrasting areas of pigmentation across the animals’ surface that form false edges which disguise the shape of the body and impede detection. In many taxa these false edges feature local contrast enhancement or edge enhancement, light areas have lighter edges and dark areas have darker edges. This additional quality is often overlooked in existing research. Here we ask whether disruptive camouflage can have benefits above and beyond concealing location. Using a novel paradigm, we dissociate the time courses of localisation and identification of a target in a single experiment. We measured the display times required for a stimulus to be located or identified (the critical duration). Targets featured either uniform, disruptive or edge enhanced disruptive colouration. Critical durations were longer for identifying targets with edge enhanced disruptive colouration camouflage even when presented against a contrasting background, such that all target types were located equally quickly. For the first time, we establish empirically that disruptive camouflage not only conceals location, but also disguises identity. This shows that this form of camouflage can be useful even when animals are not hidden. Our findings offer insights into how edge enhanced disruptive colouration undermines visual perception by disrupting object recognition

Evaluation of physical activity at Forest School

While the health benefits of physical activity are commonly recognised, increasing evidence indicates that significant percentages of children, particularly girls, are not sufficiently physically active. Children spend a large proportion of their waking day at school; however their opportunities to be physically active during the school day, beyond the traditional PE lesson and break times, are limited. Increasing children’s levels of physical activity during their time at school may be a key approach to increasing children’s overall levels of physical activity. The aim of this study was to evaluate the outdoor education programme ‘Forest School’ as a source of school based physical activity. A review of existing research showed that there had been no rigorous evaluation of physical activity during Forest School sessions. A two phase mixed method design was used. The first phase used a repeated measures controlled design to objectively measure the amount, intensity, duration and frequency of the participants’ (n26 age 9-10) physical activity during Forest School. The second phase used semi-structured paired interviews (n24 age 10-11) to understand the subjective experience of the Forest School physical activity. The study was conducted in the central belt of Scotland. The results showed that during Forest School sessions the participants engaged in a significantly greater total amount of physical activity, at a higher intensity, and with a greater frequency of longer bouts, in comparison to the typical school days. The children were also shown to reach the recommended hour of MVPA during the Forest School sessions. The children reported enjoying and appreciating the opportunity to be physically active in an environment they had little previous experience of using. Existing barriers to physical activity in other contexts, in particular bad weather and low motivation, did not appear to be relevant at Forest School. The inequality in levels of physical activity and motivation to be physically active, between males and females, was shown to typically be lower on the Forest School days. The findings suggest participation in Forest School resulted in greater quantities of inclusive and enjoyable physical activity at higher intensities than otherwise experienced at school

Nutrition knowledge and influence on diet in the carer-client relationship in residential care settings for people with intellectual disabilities

People with intellectual disabilities generally have poorer health outcomes compared to those who do not, including outcomes related to nutrition-related non-communicable diseases. Carers support people with intellectual disabilities in many aspects including habitual shopping and preparation of food, but their own nutrition knowledge and the influence this may have on dietary intakes of clients is unknown. We explored the nutrition knowledge of carers of people with intellectual disabilities in residential care settings, their dietary habits and their influence on clients’ food shopping and preparation and therefore the diet consumed by their clients. Ninety-seven carers belonging to a large independent care sector organisation specialising in the care of people with an intellectual disability completed a validated general nutrition knowledge and behaviour questionnaire. Seventeen carers from the residential care settings were interviewed to contextualise practice. Knowledge about key dietary recommendations scored highly. Carers who had more work experience were found to be have higher scores in ‘making everyday food choices’ (p=0.034). Daily consumption of fruit and vegetables (at least one portion per day) was observed (for fruit by 39% of the carers and for vegetables by 44% of the carers), whilst most carers reported avoiding consuming full fat dairy products, sugary foods and fried foods. Concept of a healthy diet; typical dietary habits of clients; role in food acquisition; and training in nutrition emerged as themes from the interviews. Carers discussed various topics including importance of a balanced diet, cooking fresh foods and control of food portion sizes for clients relative to the care philosophy of a client-centred approach, which encapsulates client autonomy. Gaps in knowledge around specific nutrients, making healthy choices and cooking skills remain. Carers have an influence on client’s dietary choices; they are able to provide healthy meals and share good dietary habits with clients. Further training in nutrition is recommended for impact on clients’ health

Beyond Measure? The State of Evaluation and Action in Ontario's Youth Sector

Program evaluation has the potential to inform and improve youth work practice, as well as help youth sector organizations and initiatives to better understand the impact of their work. This report presents findings from the first province-wide study of the Ontario youth sector's experiences conducting evaluations of their programs and services.This multi-focal study, led by Ontario's Youth Research & Evaluation eXchange (YouthREX), used a Community Dialogue Approach. Grounded in an extensive literature review and drawing on survey and interview data, the report puts forward ten key recommendations for three youth sector stakeholder groups: funders, evaluation capacity builders, and youth sector organizations.The study's contextualized examination of the youth sector's evaluation strengths informs YouthREX's service delivery strategy, and contributes to critical conversations around evaluation-related challenges and opportunities in the youth sector context

He's my mate you see':A critical discourse analysis of the therapeutic role of companion animals in the social networks of people with a diagnosis of severe mental illness

There is increasing recognition of the role pets play in the management of mental health conditions. Evidence suggests that pets promote social interaction and provide secure and intimate relationships which support the management of symptoms. This paper aimed to extend this evidence by exploring the phenomenological understanding of relationships and relationality with companion animals as therapeutic agents in the context of people's wider social networks.A qualitative study was undertaken incorporating 35 interviews with 12 participants with a diagnosis of severe mental illness who identified a pet as being important in the management of mental health. Participants took part in three in-depth interviews centred on ego network mapping over a 12-month period (baseline, 6 and 12 months). A critical discourse analysis examined therapeutic relationships with pets in relation to mental health and compared these to other types of support over time. Summative discourse analyses were combined with a cross-case thematic analysis to look for commonalities and differences across individuals.Compared with interactions with other therapeutic agents, relationships with pets were free from the obligations and complexities associated with other types of network members and provided an extension and reinforcement to an individual's sense of self which militated against the negative experiences associated with mental illness. Relationships with human network members were more variable in terms of consistency and capacity to manage demands (eg, network members requiring support themselves) and the emotions of others associated with fluctuations in mental health.This study adds weight to research supporting the inclusion of companion animals in the lexicon of mental health self-management through the therapeutic value attributed to them by participants within a wide personal network of support. The findings point to how consideration might usefully be given to how relationships with companion animals can be incorporated into healthcare planning and delivery

Edge enhancement improves disruptive camouflage by emphasising false edges and creating pictorial relief

Disruptive colouration is a visual camouflage composed of false edges and boundaries. Many disruptively camouflaged animals feature enhanced edges; light patches are surrounded by a lighter outline and/or a dark patches are surrounded by a darker outline. This camouflage is particularly common in amphibians, reptiles and lepidopterans. We explored the role that this pattern has in creating effective camouflage. In a visual search task utilising an ultra-large display area mimicking search tasks that might be found in nature, edge enhanced disruptive camouflage increases crypsis, even on substrates that do not provide an obvious visual match. Specifically, edge enhanced camouflage is effective on backgrounds both with and without shadows; i.e. this is not solely due to background matching of the dark edge enhancement element with the shadows. Furthermore, when the dark component of the edge enhancement is omitted the camouflage still provided better crypsis than control patterns without edge enhancement. This kind of edge enhancement improved camouflage on all background types. Lastly, we show that edge enhancement can create a perception of multiple surfaces. We conclude that edge enhancement increases the effectiveness of disruptive camouflage through mechanisms that may include the improved disruption of the object outline by implying pictorial relief

The clinical and behavioral cardiometabolic risk of children and young people on mental health inpatient units: A systematic review and meta-analysis

Objective: Serious mental illness is associated with physical health comorbidities, however most research has focused on adults. We aimed to synthesise existing literature on clinical and behavioral cardiometabolic risk factors of young people on mental health inpatient units. Methods: A systematic review and meta-analysis was conducted, using electronic searches of PsycINFO, EMBASE, AMED, Cochrane Central Register of Controlled Trials, and Ovid MEDLINE. Eligible studies included child/adolescent mental health inpatient units for 25) was 32.4% (95% CI 26.1%–39.5%; n = 2789), and who were obese (BMI > 30) was 15.5% (95% CI 4.5%–41.6%; n = 2612). Pooled prevalence rates for tobacco use was 51.5% (95% CI 32.2–70.2; N = 804,018). Early signs of metabolic risk were observed; elevated blood cholesterol, presence of physical health conditions, and behavioral risk factors (e.g. physical inactivity). Conclusions: This review highlights the vulnerability of young people admitted to inpatient units and emphasises the opportunity to efficiently monitor, treat and intervene to target physical and mental health

Virtual reality:a tool for investigating camouflage

Disruptive camouflage utilises high-contrast patches, typically positioned at the margins of an object to impede the detection and/or recognition of a perceiver. To date, the predominant methods for examining camouflage strategies are computer-based (i.e., detection experiments), field-based (e.g., survival analyses) and camouflage choice experiments using dynamically coloured organisms (e.g., cephalopods). Recent advances in virtual reality (VR) technology present the opportunity to create novel environments for testing camouflage theory. VR can combine the control of lab-based research with the ecological validity of field-based studies. Here, we develop an experimental paradigm that enables camouflage testing within a virtual reality environment. The environment comprised a spherical target that can be wrapped with different camouflage patterns and a domed background, upon which a natural image can be projected. Participants were positioned within the centre of the dome and were tasked with finding and shooting at targets randomly positioned across a bounded range within the environment. We manipulated the luminance contrast (0–2 steps of 2.5 L *) of disruptive and edge-enhancement (EE) components of the camouflage patterning to examine their impact on participant response time. Having high, but not extreme, contrast resulted in increased camouflage effectiveness. The EE component had no effect independently but interacted with the DC component. Specifically, when using EE alongside DC, a lower contrast EE component is more effective than a higher contrast EE component. Our results demonstrate that VR is a viable research tool for testing camouflage theory