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1.
Although a significant amount of research has focused on traditional media choice and use, and even on some ‘new’ media, these studies have either neglected the Internet and World Wide Web or were conducted prior to their recent popularity. This study offers a novel exploration of individuals' use of three Internet functions (information retrieval, information giving, and conversation capabilities) in the context of the use of other communication media. Data from 684 individuals demonstrate that the Internet is a multidimensional technology used in a manner similar to other, more traditional media. Specifically, conversation features of the Internet align with mediated interpersonal technologies (the telephone and electronic mail), whereas the Internet's information‐retrieval and information‐giving features are used in ways similar to mass media channels (newspapers, television, and books and magazines). In addition, needs fulfilled by these channels cluster in ways consistent with past research, regardless of the technologies employed to meet them.  相似文献   
2.
Public goods theories highlight an incentive system that rewards ‘free riding’ on the contributions of early contributors toward collective actions. However, because such theories focus on creation of the good, they may underestimate returns that accrue to early contributors subsequent to the good's realization. The concept of formative investment is introduced here to describe the extent to which organizations help to create public goods such as interorganizational linkages like participatory federations. Data from the CEOs of 48 organizations involved in a participatory federation were used to assess how an organization's level of formative investment is related to later patterns of dependency and interaction among federation members. Findings suggest that from a long‐term perspective, and for goods that involve communication and interaction, the incentive structure may not be so favorable for free riders. To the extent that organizations with high formative investment have the capability to envision the future and communicate that vision to potential federation partners, they may be able to both reduce free riding and secure for themselves advantageous positions in the subsequent network of relations.  相似文献   
3.
Molecular sequence data, made available in the last 15 years or so, have led to the classification of living cells into three phylogenetic domains: Bacteria, Archaea, and Eucarya. All the organisms that have been tested belonging to either domain were capable of mounting a stress response with essentially the same characteristics, regardless of the stressor. The protagonists in the cell's stress response are the stress genes and their protein products. Some of the latter are molecular chaperones. Under physiological conditions, these chaperones aid other cellular proteins to fold properly and achieve a native -functional- configuration, and to translocate from the place of synthesis to the cell's locale in which they will operate. In a stressed cell, the stress proteins that are chaperones protect other molecules from denaturation and help those partially damaged to regain a functional configuration. Thus, cell death is avoided and recovery is enhanced. The study of stress genes and proteins has progressed considerably in organisms belonging to the domains Bacteria and Eucarya. Less is known about the archaeal stress genes. Here, research with an organism from the Archaea is discussed, focusing on the stress genes of the hsp70 (dnaK) locus. Future perspectives for basic and applied research within the health sciences and biotechnology industries are presented.  相似文献   
4.
Although children born preterm or low birth weight (PT LBW) are more likely to exhibit behavior problems compared to children born at term, developmental and family processes associated with these problems are unclear. We examined trajectories of maternal depressive symptoms in relation to toddler compliance and behavior problems in families with PT LBW infants. A total of 177 infants (93 boys, 84 girls) and their mothers enrolled in the study during the infant's NICU stay. Data were collected at five time points across 2 years. Assessments of maternal depressive symptoms were conducted at all time points, and toddler compliance and opposition to maternal requests and behavior problems were assessed at 2 years. Toddlers born earlier with more health problems to mothers whose depressive symptoms increased over time exhibited the most opposition to maternal requests during a cleanup task at 24 months, consistent with multiple risk models. Mothers with elevated depression symptoms reported more behavior problems in their toddlers. The study has implications for family‐based early intervention programs seeking to identify PT LBW infants at highest risk for problem behaviors.  相似文献   
5.
The aim of the current study was to assess the relative uniqueness of three components of male body image (i.e., muscle, body fat, and height dissatisfaction) in the prediction of indices of psychological distress (i.e., depression, eating restraint, eating concerns, and social sensitivity) among a community sample of 228 gay men. Results indicated that body fat dissatisfaction was predictive of all four criterion variables (controlling for muscle dissatisfaction). Conversely, muscle dissatisfaction was only associated with social sensitivity, while height dissatisfaction failed to significantly predict any of the criterion variables. These findings highlight the relative importance of body fat dissatisfaction among gay men and suggest that researchers and clinicians working with this population should utilize measures which include assessment of both muscularity and body fat.  相似文献   
6.
This study investigated whether gay men and lesbians are assumed to have attributes stereotypically associated with the other gender. Participants were 110 male and female undergraduates from a private, Midwestern, U.S. university. Participants were randomly assigned to one of four conditions (i.e., gay male, lesbian, heterosexual female, heterosexual male) and rated their given target on possession of traditionally masculine and feminine occupational interests, activities, and traits. Results revealed that, despite some changes in the status of gay men and lesbians in society, stereotypes regarding sexual orientation were similar to those seen in studies conducted 20 years ago. Specifically, gay males were viewed as less masculine/more feminine than heterosexual males, and lesbians were viewed as more masculine/less feminine than heterosexual females.  相似文献   
7.
The aim of the current study was to assess psychosocial correlates (i.e., perceived weight, weight control strategies, substance use, and victimization) of frequent indoor tanning in adolescent boys—a group at high risk for developing skin cancer. Participants (N = 7,907) were drawn from a nationally representative sample of adolescent boys attending high school in the United States. Binary logistic regression revealed that extreme weight control strategies, particularly steroid use (odds ratio = 3.67) and compensatory vomiting (odds ratio = 2.34), along with substance use and victimization, were significantly related to frequent indoor tanning. These results highlight the role of appearance-changing, and health-risk behaviors in the context of frequent indoor tanning. Skin cancer prevention interventions may benefit from adopting approaches that integrate the treatment of body dissatisfaction and subsequent maladaptive behaviors.  相似文献   
8.
Health anxiety involves persistent worry about one's physical health, despite medical reassurance. Cognitive-behavioral therapy (CBT) is currently the most widely used, evidence-based treatment for health anxiety. Mindfulness-based cognitive therapy (MBCT) is an evidence-based cognitive-behavioral treatment approach that may be useful for health anxiety due to its focus on nonjudgmental awareness and acceptance of physical and emotional events. MBCT has largely been evaluated in a group format; however, the majority of outpatient CBT providers rely also on individual treatments. No research to date has examined the utility of MBCT delivered as an individual therapy for patients with health anxiety. The purpose of the current case study is to describe the delivery, acceptability, and effects of an individually delivered mindfulness-based cognitive-behavioral intervention on health anxiety symptoms for a young woman with severe health anxiety referred to outpatient behavioral medicine by her primary care provider. The treatment was a 16-session, patient-centered intervention largely delivered using MBCT techniques, supplemented by traditional cognitive-behavioral techniques. The patient completed a validated self-report measure of health anxiety symptoms (SHAI) at the beginning of each session. The treatment was found to be acceptable, as evidenced by high treatment attendance and patient feedback. The patient reported significant cognitive, affective, and behavioral improvements, including a 67% reduction in medial visits. Health anxiety scores on the SHAI showed a 52% decrease from the first to last session, reliable change index score of 12.11, and fell below the clinical cutoff at the final session, demonstrating clinical significance. These results suggest that it is feasible to adapt MBCT for the individual treatment of health anxiety, and that controlled trials of individual MBCT are warranted.  相似文献   
9.
The current study reviewed relationships between gender roles and (a) eating pathology, (b) body dissatisfaction, and (c) muscle dissatisfaction among men via meta-analysis. Moderators of sexual orientation and type of gender role measure were also investigated. Results revealed the relationship between femininity and eating and body-related variables did not significantly differ from zero. Sexual orientation moderated the relationship between femininity and muscle dissatisfaction (i.e., femininity was negatively related to muscle dissatisfaction for heterosexual but not gay men). Masculinity was negatively associated with eating pathology and body dissatisfaction. Type of masculinity measure moderated the relationship between masculinity and body dissatisfaction (i.e., trait-based measures produced a negative association, multidimensional measures yielded nonsignificant relationships). Type of masculinity measure produced a cross-over interaction when examining muscle dissatisfaction (i.e., trait-based instruments yielded a negative association and multidimensional instruments revealed a positive relationship). Findings highlight the salience of masculinity in men's eating and body concerns.  相似文献   
10.
Innovation adoption research has demonstrated that organizational features and perceived benefits of innovations play significant roles in explaining organizational‐level decisions to adopt new technologies. Beyond such motivations, however, social pressures operating at the interorganizational level have been proposed to influence the decision to adopt innovations, even without regard to any proven or anticipated benefit from the innovation itself. To empirically determine the influence of organizational features, perceived benefits, and social pressures on organizations' innovation adoption decisions, this study examined the decisions of 288 organizations to adopt Internet websites. Organizational social pressures were found to be the most significant discriminators of adopters and non adopters, although they were not particularly important in predicting the likelihood of future adoption for those organizations currently without websites. This finding suggests that social pressures are significant in innovation adoption, but that they may have their strongest effect during the early phases of innovation diffusion. Organizational features and perceived benefits were also reasonable discriminators of adopters and nonadopters as well as effective predictors of the likelihood of adoption for nonadopters. To a lesser degree, these factors were also predictive of the stage of adoption for those organizations that have already adopted websites.  相似文献   
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