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21.
Katelyn K. Fletcher Carolyn Brockmeyer Cates Alan L. Mendelsohn Catherine S. Tamis‐LeMonda 《Infancy》2020,25(5):535-551
Play offers rich opportunities for toddlers to develop motor, social, cognitive, and language skills, particularly during interactions with adult caregivers who may scaffold toddlers to higher levels of play than toddlers achieve on their own. However, research on play has narrowly focused on children from White, middle‐income backgrounds, leaving a dearth of knowledge about dyadic play in diverse cultural communities. We videorecorded 222 Mexican‐American mothers playing with their 2‐year‐old toddlers with a standard set of toys. Play behaviors were coded as nonsymbolic or symbolic (play type) and as expressed through manual, verbal, or multiple channels (play modality). Play between toddlers and mothers was frequent, high in symbolic content, and toddler play closely corresponded with mother play in type and modality: Toddlers’ nonsymbolic play related to mothers’ nonsymbolic play; toddlers’ symbolic play related to mothers’ symbolic play; toddlers’ manual play related to mothers’ manual play; and toddlers’ multimodal play related to mothers’ multimodal play. Play in Mexican‐American mothers and toddlers is frequent, multimodal, and symbolically rich, offering new directions for future research and practice. 相似文献
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Eric Specking Bobby Cottam Gregory Parnell Edward Pohl Matthew Cilli Randy Buchanan Zephan Wade Colin Small 《Risk analysis》2019,39(9):1899-1912
Recently, efforts to model and assess a system's resilience to disruptions due to environmental and adversarial threats have increased substantially. Researchers have investigated resilience in many disciplines, including sociology, psychology, computer networks, and engineering systems, to name a few. When assessing engineering system resilience, the resilience assessment typically considers a single performance measure, a disruption, a loss of performance, the time required to recover, or a combination of these elements. We define and use a resilient engineered system definition that separates system resilience into platform and mission resilience. Most complex systems have multiple performance measures; this research proposes using multiple objective decision analysis to assess system resilience for systems with multiple performance measures using two distinct methods. The first method quantifies platform resilience and includes resilience and other “ilities” directly in the value hierarchy, while the second method quantifies mission resilience and uses the “ilities” in the calculation of the expected mission performance for every performance measure in the value hierarchy. We illustrate the mission resilience method using a transportation systems‐of‐systems network with varying levels of resilience due to the level of connectivity and autonomy of the vehicles and platform resilience by using a notional military example. Our analysis found that it is necessary to quantify performance in context with specific mission(s) and scenario(s) under specific threat(s) and then use modeling and simulation to help determine the resilience of a system for a given set of conditions. The example demonstrates how incorporating system mission resilience can improve performance for some performance measures while negatively affecting others. 相似文献
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The claim that high levels of engagement can enhance organizational performance and individual well‐being has not previously been tested through a systematic review of the evidence. To bring coherence to the diffuse body of literature on engagement, the authors conducted a systematic synthesis of narrative evidence involving 214 studies focused on the meaning, antecedents and outcomes of engagement. The authors identified six distinct conceptualizations of engagement, with the field dominated by the Utrecht Group's ‘work engagement’ construct and measure, and by the theorization of engagement within the ‘job demands–resources’ framework. Five groups of factors served as antecedents to engagement: psychological states; job design; leadership; organizational and team factors; and organizational interventions. Engagement was found to be positively associated with individual morale, task performance, extra‐role performance and organizational performance, and the evidence was most robust in relation to task performance. However, there was an over‐reliance on quantitative, cross‐sectional and self‐report studies within the field, which limited claims of causality. To address controversies over the commonly used measures and concepts in the field and gaps in the evidence‐base, the authors set out an agenda for future research that integrates emerging critical sociological perspectives on engagement with the psychological perspectives that currently dominate the field. 相似文献
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Correspondence to: Professor Colin Pritchard, Department of Mental Health, School of Medicine, Southampton University, Royal South Hants Hospital, Southampton SO14 0YG, UK. E-mail: cp1{at}soton.ac.uk Summary The study compares Mental-Disorder-Related (MDR) suicide rateswith Child-Sex-Abuse-Related (CSAR) suicide of Victimsand Perpetrators of child sex abuse, based uponan examination of all Coroners inquest files over a six-yearperiod (n = 1,017). Census data, psychiatric case register andpolice records were used to calculate the potential MDR andCSAR populations. There were five main findings: (i) male andfemale CSAR victim suicide rates were 2.2. and 2.5 times theGeneral Population Suicide Rate (GPSR), respectively; (ii) everyfemale, and 80 per cent of male CSAR victim suicides, also hada mental disorder but none of the CSAR perpetrator suicides;(iii) male and female MDR suicide rates were 5 and 6 times theCSAR Victim rates; (iv) the sex abuser perpetrators suiciderate was more than 3 times the male MDR rate; (v) the intra-and extra-familial perpetrator suicide rates, were 25 and 78times the GPSR, respectively. Possible explanations for thesesurprising results are briefly discussed. They confirm the overrepresentationof people with mental disorder amongst suicides, and identifyan overrepresentation of CSAR suicides, particularly perpetrators.The results have implications for suicide prevention programmes,whilst highlighting the importance of the child protection-psychiatricinterface, and indicates the futility of simple explanationsin an area of practical and moral complexity. 相似文献
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Winston Fletcher 《Long Range Planning》1978,11(6):37-41
The advertising industry in the U.K. has for many years been regarded as a dynamic and growing industry. This paper examines the proposition and details the historical growth of the advertising industry during post war years and outlines structure through which that growth occurred. Furthermore, the author examines the structure of advertising expenditure both in terms of supply (that is the types of media utilized) and the demand (that is the types of commercial or industrial activity).
The author details surprising facts about the level of business at which the advertising industry is currently operating and examines the causes for the trends he discerns. As the Managing Director of an advertising agency formed in 1974 the author is both a qualified and deeply concerned writer. 相似文献