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51.
Research examining infants’ discrimination of affect often uses unfamiliar faces and voices of adults. Recently, research has examined infant discrimination of affect in familiar faces and voices. In much of this research, infants were habituated to the affective expressions using a “standard” 50% habituation criterion. We extend this line of research by examining infants’ discrimination of unfamiliar peers’, that is, 4‐month‐olds, dynamic, facial, and vocal affective expressions and assessing how discrimination is affected by changing the habituation criterion. In two experiments, using an infant‐controlled habituation design, we explored 3‐ and 5‐month‐olds’ discrimination of their peers’ dynamic audiovisual displays of positive and negative expressions of affect. Results of Experiment 1, using a 50% habituation criterion, revealed that 5‐month‐olds, but not 3‐month‐olds discriminated the affective expressions of their peers. In Experiment 2, we examined whether 3‐month‐olds’ lack of discrimination in Experiment 1 was a result of insufficient habituation (i.e., familiarization). Specifically, 3‐month‐olds were habituated using a 70% habituation criterion, providing them with longer familiarization time. Results revealed that using the more stringent habituation criterion, 3‐month‐olds showed longer habituation times, that is increased familiarization, and discriminated their peers’ affective expressions. Results are discussed in terms of infants’ discrimination of affect, the role of familiarization time, and limitations of the 50% habituation criterion.  相似文献   
52.
In a previous paper it has been shown that across three cohorts of men and women born in Britain in 1946, 1958 and 1970 a gender difference exists in regard to relative rates of class mobility. For men these rates display an essential stability but for women they become more equal. The aim of the present paper is to shed light on the causes of this trend—or, that is, of increasing social fluidity—among women. We begin by considering a refined version of the perverse fluidity hypothesis: that is, one that proposes that part‐time work leads to increasing downward worklife mobility among women that also entails downward intergenerational mobility and thus promotes greater fluidity. We do in fact find that the increase in fluidity is very largely, if not entirely, confined to women who have had at least one period of part‐time work. However, a more direct test of the hypothesis is not supportive. We are then led to investigate whether it is not that part‐time working itself is the crucial factor but rather that women who subsequently work part‐time already differ from those who do not at entry into employment. We find that eventual full‐ and part‐timers do not differ in their class origins nor, in any systematic way, in their educational qualifications. But there is a marked and increasing difference in the levels of employment at which they make their labour market entry. Eventual part‐timers are more likely than eventual full‐timers to enter in working‐class positions, regardless of their class origins and qualifications. Insofar as these women are from more advantaged origins, they would appear not to seek to exploit their advantages to the same extent as do full‐timers in order to advance their own work careers. And it is, then, in the downward mobility accepted by these women—who increase in number across the cohorts—that we would locate the main source of the weakening association between class origins and destinations that is revealed among women at large.  相似文献   
53.
Scientists, activists, industry, and governments have raised concerns about health and environmental risks of nanoscale materials. The Society for Risk Analysis convened experts in September 2008 in Washington, DC to deliberate on issues relating to the unique attributes of nanoscale materials that raise novel concerns about health risks. This article reports on the overall themes and findings of the workshop, uncovering the underlying issues for each of these topics that become recurring themes. The attributes of nanoscale particles and other nanomaterials that present novel issues for risk analysis are evaluated in a risk analysis framework, identifying challenges and opportunities for risk analysts and others seeking to assess and manage the risks from emerging nanoscale materials and nanotechnologies. Workshop deliberations and recommendations for advancing the risk analysis and management of nanotechnologies are presented.  相似文献   
54.
55.
Current understandings of sexual difficulties originate from a model that is based on the study of heterosexual men and women. Most research has focused on sexual difficulties experienced by heterosexual men incapable of engaging in vaginal penetration. To better understand men’s perceptions and experiences of sexual difficulties, seven focus groups and 29 individual interviews were conducted with gay (n = 22), bisexual (n = 5), and heterosexual (n = 25) men. In addition, the extent to which difficulties reported by gay and bisexual men differ from heterosexual men was explored. Data were analyzed using thematic analysis applying an inductive approach. Two intercorrelated conceptualizations were identified: penis function (themes: medicalization, masculine identity, psychological consequences, coping mechanisms) and pain (themes: penile pain, pain during receptive anal sex). For the most part, gay, bisexual, and heterosexual men reported similar sexual difficulties; differences were evident regarding alternative masculinity, penis size competition, and pain during receptive anal sex. The results of this study demonstrate the complexity of men’s sexual difficulties and the important role of sociocultural, interpersonal, and psychological factors. Limitations and suggested directions for future research are outlined.  相似文献   
56.
Significant multi-layered challenges with delivering quality practicum experiences to social work students have led field education coordinators to release a joint statement that social work field education in Canada is in a state of crisis. This article presents the results of a two-year mixed methods study that sought to investigate and describe the challenges in order to enhance understanding of the crisis from the perspective of Canadian social work field education coordinators. The results indicate that social work education programs in Canada face four key challenges in regard to field education that can be further divided into two sections: (a) the social work practice field and (b) social work field education administration. The two key challenges associated with the social work practice field are: (a) social work practice contexts and realities and (b) practicum shortages and saturation. The two key challenges associated with social work field education administration are: (a) practicum procurement and field instructor recruitment and retention; and (b) expectations and workloads of field education coordinators. To address these challenges, collaborative development of a multi-level strategy aimed at moving beyond the current state of crisis toward a sustainable model of social work field education in Canada is recommended.  相似文献   
57.
This article addresses the need to establish a comprehensive conceptual framework for analysing healthcare systems and their transformations. It begins by offering an overview of the current state of the art in the field, pointing to the literature's absence of conceptual robustness in the definition of system types. By exploring the dimensions 'financing', 'provision' and 'regulation' of healthcare, the article then proceeds deductively in line with the 'Weberian method of ideal-types' to establish a taxonomy of 27 healthcare systems, of which three can be identified as 'ideal-types'. When applying this concept, not only can differences between healthcare systems be analysed, but also changes over time. The article concludes by identifying three forms of healthcare system transformation.  相似文献   
58.
Child health     
In "Child Health," Lorraine V. Klerman, a professor at Brandeis University's Heller School for Social Policy and Management, describes the difficulty of measuring welfare reform's impact on children's physical and mental health by using existing data sources and suggests additional approaches to consider. She relies on the following data sources: the Behavior and Risk Factor Surveillance System (BRFSS); the Current Population Survey (CPS); the Medical Expenditure Panel Survey (MEPS); the National Health Interview Survey (NHIS); the National Health and Nutritional Examination Survey (NHANES); the National Hospital Discharge Survey (NHDS); the National Household Survey of Drug Abuse (NHSDA); the National Immunization Survey; the State and Local Area Integrated Telephone Survey (SLAITS); the VSCP; and the Youth Risk Behavior Surveillance System (YRBSS).  相似文献   
59.
The purpose of this article is to identify the contexts for service that are useful for the professional development of university faculty as well as to suggest a model for delivering the work that is part of this type of professional development. The article accomplishes this goal by examining contexts for service, related activities and transformable skills. The model suggested for developing and implementing service activities consists of three components: 1) an initiating force, 2) ways for testing and sharing ideas, and 3) proposed solutions.  相似文献   
60.
The measurement of subjective components of sexual functioning is of increasing importance in clinical research and practice. Differences have been reported in prevalence rates and experiences of sexual difficulties between heterosexual and gay men. The aim of this article is to identify reliable and valid measures of sexual dysfunction suitable for use with gay men. Seven measures were reviewed; details about item development, dimensionality, reliability, and validity are provided. Heteronormative and heterosexist wording were evident throughout. Several areas of concern emerged in relation to psychometric properties (e.g., questionable validity). No psychometrically robust sexual function measure was identified for use with gay populations.  相似文献   
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