Estimating the reliability of repeatedly measured endpoints based on linear mixed‐effects models. A tutorial

There are various settings in which researchers are interested in the assessment of the correlation between repeated measurements that are taken within the same subject (i.e., reliability). For example, the same rating scale may be used to assess the symptom severity of the same patients by multiple physicians, or the same outcome may be measured repeatedly over time in the same patients. Reliability can be estimated in various ways, for example, using the classical Pearson correlation or the intra‐class correlation in clustered data. However, contemporary data often have a complex structure that goes well beyond the restrictive assumptions that are needed with the more conventional methods to estimate reliability. In the current paper, we propose a general and flexible modeling approach that allows for the derivation of reliability estimates, standard errors, and confidence intervals – appropriately taking hierarchies and covariates in the data into account. Our methodology is developed for continuous outcomes together with covariates of an arbitrary type. The methodology is illustrated in a case study, and a Web Appendix is provided which details the computations using the R package CorrMixed and the SAS software. Copyright © 2016 John Wiley & Sons, Ltd.     

“The Day All of the Different Parts of Me Can Come Along”: Intersectionality and U.S. Third World Feminism in the Poetry of Pat Parker and Willyce Kim

This article brings to light the poetry of Pat Parker and Willyce Kim, two key figures within the 1970s and ‘80s women in print movement. While Parker and Kim have been rightly placed within African-American and Asian-American histories, respectively, and working-class and lesbian-feminist literary histories, their work is most fully understood within the context of U.S. Third World Feminism. Through close readings of poetic form and content in addition to engagement with current debates about intersectionality as a methodology, the article links Kim and Parker's works to central contributions of U.S. Third World Feminism such as intersectionality and power across and within difference that continue to influence feminist theory today.     

The discursive construction of gay teenagers in times of mediatization: youth's reflections on intimate storytelling,queer shame and realness in popular social media places

New media applications such as social networking sites are understood as important evolutions for queer youth. These media and communication technologies allow teenagers to transgress their everyday life places and connect with other queer teens. Moreover, social media websites could also be used for real political activism such as publicly sharing coming out videos on YouTube. Despite these increased opportunities for self-reflexive storytelling on digital media platforms, their everyday use and popularity also bring particular complexities in the everyday lives of young people. Talking to 51 youngsters between 13 and 19 years old in focus groups, this paper inquires how young audiences discursively constructed meanings on intimate storytelling practices such as interpreting intimate stories, reflecting on their own and other peers' intimate storytelling practices. Specifically focusing on how they relate to intimate storytelling practices of gay peers, this paper identified particular challenges for queer youth who transgress the heteronormative when being active on popular social media. The increasing mediatization of intimate youth cultures brings challenges for queer teenagers, which relate to authenticity, (self-) surveillance and fear of imagined audiences.     

Asexuality: A Multidimensional Approach

While lack of sexual attraction, lack of sexual behavior, and self-identification as asexual have been used as criteria to define asexuality, it is not known how much they overlap in describing the same group of people. This study aimed to assess how many individuals could be identified as asexual based on each of these criteria and on combinations of these criteria. Participants were recruited through the Asexuality Visibility and Education Network, social media, and posts on several health- and lifestyle-related websites. In total, 566 participants between 18 and 72 years old (M = 27.86, SD = 10.53) completed an online survey (24% male, 68.9% female, 7.1% “other”). Based on self-identification or lack of sexual attraction, 71.3% and 69.2%, respectively, of participants were categorized as asexual, while based on lack of sexual behavior only 48.5% were categorized as asexual. Gender differences were found only for those participants who indicated that they did not experience sexual attraction, with more women (72.8%) than men (58.8%) indicating a lack of sexual attraction. Given that self-identification as asexual implies familiarity with the term asexual, we argue for the use of lack of sexual attraction as the primary criterion to define asexuality.     

The Job Demand-Control (-Support) Model and psychological well-being: A review of 20 years of empirical research

The Job Demand-Control (JDC) model (Karasek, 1979) and the Job Demand-Control-Support (JDCS) model (Johnson, and Hall, 1988) have dominated research on occupational stress in the last 20 years. This detailed narrative review focuses on the JDC(S) model in relation to psychological well-being. It covers research from 63 samples, published in the period 1979-1997. In the review a distinction is drawn between two different hypotheses prevailing in research on the models. According to the strain hypothesis of the JDC model, employees working in a high-strain job (high demands-low control) experience the lowest well-being. The buffer hypothesis states that control can moderate the negative effects of high demands on well-being. Translating these hypotheses to the expanded JDCS model, the iso-strain hypothesis predicts the most negative outcomes among workers in an iso-strain job (high demands-low control-low social support/isolation), whereas the buffer hypothesis states that social support can moderate the negative impact of high strain on well-being. Although the literature gives considerable support for the strain and iso-strain hypotheses, support for the moderating influence of job control and social support is less consistent. The conceptualization of demands and control is a key factor in discriminating supportive from nonsupportive studies. Only aspects of job control that correspond to the specific demands of a given job moderate the impact of high demands on well-being. Furthermore, certain subpopulations appear to be more vulnerable to high (iso)strain, whereas others benefit more from high control. On the basis of the results of this review, suggestions for future research and theoretical development are formulated.     

Starting Relationships with Neighbors After a Move Later in Life: An Exploratory Study

The authors examined eight personal and contextual conditions associated with starting new relationships with neighbors after short- and long-distance moves. A total of 625 Dutch movers and 1,936 non-movers (57–93 years old) were selected from the Longitudinal Aging Study Amsterdam. OLS linear regression analyses showed that short-distance movers mainly started relationships with neighbors when they did volunteer work. Long-distance movers who moved to rural areas and felt safe in their new neighborhood or moved to areas with lower priced homes also started new relationships with neighbors. Contextual conditions appear to play a larger role than personal ones, especially after long-distance moves.     

Estimating sexual behavior parameters from routine sexual behavior data

In mathematical models for predicting the spread of sexually transmitted diseases (STDs), the rate of acquisition of new sex partners and concurrency, the number of simultaneous sexual partnerships, are important parameters. Yet, information on these parameters is rarely obtained in routine sexual behavior surveys; instead, questions about the total number of sex partners during specific periods are often asked. We present two methods that estimate the rate of partnership acquisition and concurrency from reported numbers of sex partners in two overlapping periods. The first method assumes homogeneous behavior, while the second method also takes account of heterogeneity in sexual behavior. Both methods assume random (Poisson) partnership acquisition and the possibility of overlap in relationships. For both methods it might be relevant to distinguish individuals who are in a stable relationship from those who are not.     

Facing the situation: Testing a biosocial contingency model of leadership in intergroup relations using masculine and feminine faces

Using an evolutionary psychology framework we propose that leadership and followership are evolved traits to solve recurrent group coordination problems. We argue that adaptive problems such as those concerning intergroup conflict or cooperation activate different cognitive leadership prototypes, and the face conveys diagnostic information about the suitability and emergence of intergroup leadership. Consistent with hypotheses we find that followers expect masculine-faced leaders to behave competitively and feminine-faced leaders cooperatively in intergroup relations. Furthermore, individuals prefer leaders whose facial cues match the adaptive problem. For example, a masculine-looking leader is preferred in a competitive intergroup setting. Also, this match between face and situation is reinforced with a consistent leadership message such as a masculine-looking leader expressing the need for competition. An evolutionary perspective provides a deeper understanding of the biological aspects of leadership and generates many novel hypotheses about how markers such as the human face affect leadership emergence and effectiveness.