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111.
As social media use becomes increasingly widespread among adolescents, research in this area has accumulated rapidly. Researchers have shown a growing interest in the impact of social media on adolescents’ peer experiences, including the ways that the social media context shapes a variety of peer relations constructs. This paper represents Part 2 of a two-part theoretical review. In this review, we offer a new model for understanding the transformative role of social media in adolescents’ peer experiences, with the goal of stimulating future empirical work that is grounded in theory. The transformation framework suggests that the features of the social media context transform adolescents’ peer experiences by changing their frequency or immediacy, amplifying demands, altering their qualitative nature, and/or offering new opportunities for compensatory or novel behaviors. In the current paper, we consider the ways that social media may transform peer relations constructs that often occur at the group level. Our review focuses on three key constructs: peer victimization, peer status, and peer influence. We selectively review and highlight existing evidence for the transformation of these domains through social media. In addition, we discuss methodological considerations and key conceptual principles for future work. The current framework offers a new theoretical perspective through which peer relations researchers may consider adolescent social media use.  相似文献   
112.
In the Arab and Muslim countries, there are several taboos of sexuality. To overcome the latter, and to distinguish between cultural and scientific data, sexual education is a key measure, especially during medical studies. The purpose of this study was to assess the knowledge of the Tunisian medical trainees and to identify their sources of information concerning sexuality. We conducted a survey among medical trainees of the faculty of medicine of Sfax, in Tunisia. An anonymous questionnaire was distributed to 171 and completed by 157 trainees (91.8%). The sources of knowledge about sexuality were: friends (81.5%; N = 128), internet (77.1%; N = 121), television and movies (68.2%; N = 107), courses at the faculty (40.1%; N = 63) and parents (22.9%; N = 36). The score of correct answers was higher than or equal to 75% for 28 trainees (17.8%). It was on average 63.3%. It was correlated with male gender (p = 0.006), being a second-year trainee (p = 0.017) and television and movies as a source of knowledge about sexuality (p = 0.008). Masturbation was considered pathological by 17.2% of participants (N = 27). A 5-min period of intercourse was deemed sufficient to have a female orgasm by 44 trainees (28%). Andropause and menopause are inconsistent with a satisfying sexuality according to 44.6% (N = 70) and 56.1% (N = 88) of the participants respectively.  相似文献   
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Employing a sample of 197 employee-supervisor dyads, we explore whether employees’ attitudes and underlying motivation for engaging in organizational citizenship behaviours (OCBs) differentially relate to supervisors’ assessments of their individual performance and reward recommendations. We theorized that employees who perform OCBs with self-serving motives would be low on affective commitment and high on equity sensitivity, and that such individuals would receive lower performance ratings and fewer reward recommendations than those who are high on affective commitment, low on equity sensitivity, and more selflessly motivated. Our results suggest that employees with high affective commitment, low equity sensitivity, and high selfless motives were more likely to receive positive supervisor performance ratings and high reward recommendations. We also found that affective commitment moderated the mediating path of prosocial values (a selfless motive) on the relationship between OCBs and reward recommendations. Practical implications and future research directions are discussed.  相似文献   
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Little is known about research misconduct within industry and how it compares to universities, even though a lot of biomedical research is performed by–or in collaboration with–commercial entities. Therefore, we sent an e-mail invitation to participate in an anonymous computer-based survey to all university researchers having received a biomedical research grant or scholarship from one of the two national academic research funders of Belgium between 2010 and 2014, and to researchers working in large biomedical companies or spin-offs in Belgium. The validated survey included questions about various types of research misconduct committed by respondents themselves and observed among their colleagues in the last three years. Prevalences of misconduct were compared between university and industry respondents using binary logistic regression models, with adjustments for relevant personal characteristics, and with significance being accepted for p < 0.01. The survey was sent to 1766 people within universities and an estimated 255 people from industry. Response rates were 43 (767/1766) and 48% (123/255), and usable information was available for 617 and 100 respondents, respectively. In general, research misconduct was less likely to be reported by industry respondents compared to university respondents. Significant differences were apparent for one admitted action (gift authorship) and three observed actions (plagiarism, gift authorship, and circumventing animal-subjects research requirements), always with lower prevalences for industry compared to universities, except for plagiarism. This survey, based on anonymous self-report, shows that research misconduct occurs to a substantial degree among biomedical researchers from both industry and universities.  相似文献   
116.
Since the September 11th attacks on the U.S., more than 2 million children have experienced parental deployment during their early years, with potentially lasting impact. When a parent is deployed, a number of factors may affect the well-being of the service member and his/her family. One parental factor—posttraumatic stress disorder or distress—might be particularly powerful in its effect on young children and the family system. We analyzed baseline data from an intervention development project which focused on supporting military families with very young children during post-deployment. The purpose of this research is to understand the relationships between parental mental health status, parenting stress, couple functioning, and young child well-being. The effects of mental health status of home-front and service member parents and the role of couple functioning on parent–child interactions and behavioral problems of young children were examined in a sample of military families during the post-deployment period. Findings suggest that service member posttraumatic stress symptoms are associated with higher parental report of child behavior problems. Higher quality of the couple relationship appears to lessen the impact of parental posttraumatic stress but is not related to parent perceptions of child behavior concerns. Implications for future research with military families are discussed.  相似文献   
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Diverse adaptive visual processing mechanisms allow us to complete visual search tasks in a wide visual photopic range (>0.6 cd/m2). Whether search strategies or mechanisms known from this range extend below, in the mesopic and scotopic luminance spectra (<0.6 cd/m2), has yet to be addressed. Based on a study that addressed simple target discrimination in luminance environments using contrast-dependent behavioral efficiency functions, we assessed visual search in more complex-feature and conjunction-search paradigms. The results verify the previously reported deficiency windows defined by an interaction of base luminance and luminance contrast for more complex visual-search tasks. Based on significant regression analyses, a more precise definition of the magnitude of contribution of different contrast parameters. Characterized feature search patterns had approximately a 2.5:1 ratio of contribution from the Michelson contrast property relative to Weber contrast, whereas the ratio was approximately 1:1 in a serial-search condition. The results implicate near-complete magnocellular isolation in a visual-search paradigm that has yet to be demonstrated. Our analyses provide a new method of characterizing visual search and the first insight in its underlying mechanisms in luminance environments in the low mesopic and scotopic spectra.

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Heidegger's Being and Time is an underappreciated venue for pursuing work on the role narrative plays in self‐understanding and self‐constitution, and existing work misses Heidegger's most interesting contribution. Implicit in his account of Dasein (an individual human person) is a notion of the narrative self more compelling than those now on offer. Bringing together an adaptive interpretation of Heidegger's notion of “thrown projection”, Wolfgang Iser's account of “the wandering viewpoint”, and more recent Anglo‐American work on the narrative self, I argue that we read our ongoing existences in the same way that, mid‐story, we read a narrative. Reading is a better master metaphor than authorship, narration, plot, or character to guide investigations of narrative's relation to the self. It is not merely a metaphor, however, as the hermeneutic structures involved in interpreting existence and a narrative from the middle are the same.  相似文献   
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