This study examined models of self and other as they relate to attachment, forgiveness, emotional and cognitive reactions to a breakup, relationship variables, and positive and negative feelings toward the self and former partner after a romantic relationship is ended. This study also tested how these variables change over time. Data were collected over a period of five weeks from 130 undergraduates who had experienced a breakup within the two weeks prior to beginning the study. Data were analyzed with a series of univariate and multivariate analyses of variance. Results found that there were differences in how participants reacted to the relationship breakup based on attachment style. There were some changes over time in the variables for all the attachment styles, and there was only one interaction between time and attachment style. Results are discussed in terms of previous research findings. Limitations of the current study are discussed and suggestions for future research are presented.

High prevalence and the negative legal, health, and psychological consequences of adolescent dating aggression underscore the need to identify risk and protective processes associated with this type of aggression. Studying dating aggression in early adolescence is important, as this is the developmental time frame when most youth are establishing attitudes, beliefs, and norms for dating behaviors. The current study investigated longitudinal associations between perceived parental and peer support for violent and nonviolent responses to conflict and dating aggression perpetration among middle school students. Participants included 1,399 adolescents (52% female) in the sixth (n = 466), seventh (n = 467), and eighth (n = 466) grades. Results showed that peer support for nonviolent responses predicted lower frequencies of subsequent dating aggression among sixth graders, and perceived parental support for nonviolent responses resulted in decreased frequencies of dating aggression in the seventh and eighth grades. Peer support for violent responses predicted increased dating aggression in the seventh grade, and perceived parental support for violent responses led to higher frequencies of dating aggression in the eighth grade. Additionally, dating aggression predicted changes in adolescent perceptions of parental and peer support for violent and nonviolent responses. No sex differences were found in these models. Lastly, moderation analyses identified two significant interactions. These interactions illustrated that different combinations of parental and peer support for violent and nonviolent responses affected dating aggression perpetration, highlighting the importance of examining mixed messages and combinations of messages from parents and peers. Overall, the findings from the current study indicated that adolescent perceptions of parental and peer support for violent and nonviolent responses to conflict are important risk and protective processes, respectively, that are longitudinally associated with dating aggression. These findings can inform dating violence prevention programs, and stress the importance of adolescent, parental, and peer involvement in these programs.

Reality TV dating shows have increased in popularity during the last decade. The producers of this kind of reality TV tend to claim that their shows represent a true portrayal of social reality. Viewing the world from a social constructivist perspective, social reality and behavior are understood as social constructions. From that perspective the content of dating shows are viewed as constructions shaped by, for example, the producers. The purpose of this study is to examine how love ideals and gender roles are constructed within the Swedish dating shows Farmers wants a wife [Bonde söker fru] and Faith, hope and love [Tro, hopp och kärlek].Further this study aims to compare the constructions from each show. To investigate this, an adjusted version of Norman Fairclough’s critical discourse analysis has been used. There is not much previous sociological research done concerning reality TV in general, or dating TV more specifically. However, other disciplines have investigated these fields more. For example, several feminist studies have shown that dating TV shows enforces stereotypic gender roles, and a research study in psychology has shown that dating shows may affect attitudes toward sexual behavior among youths. The study shows that the constructions about love and gender roles are similar in both dating shows. In the shows constructed ideal of love, intimacy is one of the most important things. This love ideal could be understood in the context of Anthony Giddens theory of the pure relationship. The gender role constructions in the shows contain contradictions. In many aspects the constructed gender roles reflect upon the show’s love ideal, in sense of equality and the importance of mutual commitment to the dating process. But in some ways there are more traditional gender role expressions, for example women’s criticism towards passivity amongst men. / Tv-sända dejtingprogram har blivit en alltmer populär företeelse de senaste åren. Produktionerna bakom denna form av dokusåpor anser ofta att programmen speglar en sann social verklighet. Utifrån ett socialkonstruktivistiskt perspektiv förstås samhället och socialt beteende som sociala konstruktioner. Med ett sådant perspektiv ses skildringar i dejtingprogram som en konstruktion formad av bland annat produktionen. Syftet med denna studie är att undersöka hur kärlek och könsroller konstrueras i de svenska upplagorna av dejtingprogrammen Bonde söker fru och Tro, hopp och kärlek. Vidare syftar studien till att göra en jämförelse av programmens konstruktioner rörande kärlek och könsroller. För att undersöka detta har studien utförts enligt en anpassning av Norman Faircloughs kritiska diskursanalys. En översikt av tidigare forskning visar att det inte finns mycket sociologisk forskning på området dokusåpor i allmänhet, och dejtingprogram mer specifikt. Angränsande discipliner har dock utforskat problemområdet mer. Bland annat har flera feministiska studier visat att stereotypa könroller förstärks i dejtingprogram och en studie i psykologi visade att ungdomars konsumtion av dejtingprogram kan påverka deras attityder kring sexuellt beteende. Denna studie visar att de båda programmens konstruktioner, gällande kärlek och könsroller, har stora likheter. I dejtingprogrammens genomsyrande kärleksideal betonas bland annat vikten av intimitet. Detta ideal kan förstås utifrån Anthony Giddens begrepp det rena förhållandet. Studien visar även att könrollskonstruktionerna i programmen präglas av en slitning. Till stor del går könsrollerna i linje med dejtingprogrammens kärlekskonstruktioner, då könsrollerna utmärks av en jämlikhetssträvan och vikten av ömsesidigt engagemang i dejtingen. Samtidigt innehåller könsrollkonstruktionerna bland annat kvinnors kritik mot passiva män, vilket kan förstås som ett uttryck för mer traditionella könsroller.

The purpose of this research study was to conduct an exploration of the dating preferences of African American women and U.S. men between the ages of 30-74 years old. This research focuses on the dating preferences and desirability of African American women and if they are influential on the high unmarried rates of African American women. A weighted stratified sampling of 2,800 personal advertisements of African American, Asian, Latino and White men and women from Match.com were collected to conduct the research. The five research hypotheses of this study were tested using frequency and percentage distribution, logistic regression and cross-tabulation models. The findings partially support the hypotheses African American women are more likely to prefer a mate with a bachelor's degree or higher and African American women are more likely to prefer a mate of the same race compared to U.S. women of other races. The findings also suggested non-African American men are less likely to have an interest in dating African American women and non-African American men, who are interested in dating African American women, are less likely to prefer women with a bachelor's degree or higher or a more socially desirable body type.

Estudos filogeográficos para distintas espécies de Medusozoa (Cnidaria) foram conduzidos enfatizando a área nerítica central do Atlântico Sul-ocidental (ASO), entre os litorais sudeste do Brasil e o litoral da província de Buenos Aires na Argentina. Estes foram baseados em sequências de DNA dos genes mitocondriais COI e 16S e do íntron nuclear ITS1, levando em consideração tanto a heterogeneidade atual e a historia geológica das condições oceanográficas do ASO, como também as capacidades dispersivas de Liriope tetraphylla, Olindias sambaquiensis e Acharadria crocea, inferidas pelos seus ciclos de vida. Adicionalmente, a estrutura filogeográfica de Pelagia noctiluca foi avaliada em outras regiões oceânicas, considerando o Atlântico (Atl.) e o Mediterrâneo (Med.) e utilizando os marcadores COI, 16S e ITS1. Este estudo foi conduzido através de calibrações de taxas de substituição baseadas em uma divergência significativa embora filogeneticamente rasa, entre populações do Atl. e do Pacífico. Os resultados específicos indicam: 1) padrões comuns, de expansões populacionais e estruturação genética acompanhada de padrões filogenéticos sem uma correlação geográfica evidente, para as três espécies estudadas do ASO, os quais remetem a alterações de área habitável em períodos glaciais e interglaciais a partir do Pleistoceno médio ou tardio; 2) uma estrutura filogeográfica entre populações de P. noctiluca do Atl. e do Med. que remete a possíveis efeitos de isolamento entre ambas bacias durante o Gelasiano. Além disso, aspectos dos resultados que sugerem a importância de se considerar que a demografia não seria apenas afetada pela história biogeográfica são discutidos. A demografia também modularia o grau de resposta das populações aos eventos biogeográficos, podendo ser uma característica comum para populações de espécies que mostram padrões filogeográficos similares, a despeito de possuírem biologias marcadamente distaintas. É importante salientar que a prevalência na interpretação da influência da história natural nos estudos biogeográficos não se restringe a estudos microevolutivos. A origem dos metazoários é geralmente associada ao impacto biológico de mudanças ambientais que teriam desencadeando a chamada explosão cambriana. Entretanto, a atividade tectônica que propiciou estas mudanças é pouco discutida dentro de uma abordagem biogeográfica, a qual é considerada controversa. Resultados indicadores de que as principais linhagens de Cnidaria teriam surgido ao longo do Criogeniano e o Ediacarano foram obtidos, Períodos em que novos mares e áreas de plataforma rasa estavam surgindo como resultado da fragmentação da placa continental de Rodínia. A relação entre estes eventos geológicos e um possível surgimento de biotas marinhas diversificadas, as quais poderiam ser consideradas as primeiras cladogêneses em Eumetazoa relacionadas a eventos vicariantes, é uma nova hipótese a ser considerada / Phylogeographic studies for different species of Medusozoa (Cnidaria) were performed, emphasizing the central neritic area of the South-Western Atlantic (SWA), localized between the southeastern Brazilian coast and the coast of the Buenos Aires province in Argentina. These were based on DNA sequences of the mitochondrial genes COI and 16S, and the nuclear intron ITS1. They considered both the heterogeneity of the geological history and the present oceanographic conditions of the SWA, as well as the dispersal capabilities of Liriope tetraphylla, Olindias sambaquiensis and Acharadria crocea, inferred by their life cycles. Additionally, the phylogeographic structure of Pelagia noctiluca was evaluated in other oceanic regions, considering the Atlantic (Atl.) and Mediterranean (Med.) and using COI, ITS1 and 16S as molecular markers. This study was conducted through calibrations of substitution rates based on a significant but phylogenetically shallow divergence, between populations from the Atl. and the Pacific. Specific results indicate: 1) common patterns of population expansion and genetic structure associated to phylogenetic patterns without a clear geographical correlation, for the three species of the ASO, which refer to changes of the habitable area during glacial and interglacial periods since the middle or late Pleistocene; 2) genetic structure between populations of P. noctiluca from the Atl. and Med., referring to possible isolation effects between the two basins during the Gelasian. Moreover, the results also suggest the importance of considering that the demographic aspects would not be affected only by the biogeographical history. The demography would also modulate the degree of response of populations to biogeographic events, and could be a common feature for populations of species that exhibit similar phylogeographic patterns, in spite of having markedly different biological features. It is important to notice that the prevalence in the interpretation of the influence of natural history in biogeographical studies is not restricted to microevolutionary studies. The origin of metazoans is generally associated with the biological impact of environmental changes that would have triggered the Cambrian explosion. However, the tectonic activity that resulted in such changes is not discussed within a biogeographic approach, which is considered controversial. Results indicating that the main lineages of Cnidaria emerged during the Cryogenian and Ediacaran were obtained, at that Period new seas and areas of shallow platform were emerging as a result of the fragmentation of the Rodinia continental plate. The relationship between those geological events and the possible emergence of a diverse marine biota, whose could be considered as the firsts cladogenesis in Eumetazoa related to vicariant events, is a new hypothesis to be considered

Thesis advisor: Jeremy D. Shakun / Few data are available to infer the thinning rate of the Laurentide Ice Sheet (LIS) through the last deglaciation, despite its importance for constraining past ice sheet response to climate warming. We measured 31 cosmogenic 10Be exposure ages in samples collected on coastal mountainsides in Acadia National Park and from the slightly inland Pineo Ridge moraine complex, a ~100-km-long glaciomarine delta, to constrain the timing and rate of LIS thinning and subsequent retreat in coastal Maine. Samples collected along vertical transects in Acadia National Park have indistinguishable exposure ages over a 300 m range of elevation, suggesting that rapid, century-scale thinning occurred at 15.2 ± 0.7 ka, similar to the timing of abrupt thinning inferred from cosmogenic exposure ages at Mt. Katahdin in central Maine (Davis et al., 2015). This rapid ice sheet surface lowering, which likely occurred during the latter part of the cold Heinrich Stadial 1 event (19-14.6 ka), may have been due to enhanced ice-shelf melt and calving in the Gulf of Maine, perhaps related to regional oceanic warming associated with a weakened Atlantic Meridional Overturning Circulation at this time. The ice margin subsequently stabilized at the Pineo Ridge moraine complex until 14.5 ± 0.7 ka, near the onset of Bølling Interstadial warming. Our 10Be ages are substantially younger than marine radiocarbon constraints on LIS retreat in the coastal lowlands, suggesting that the deglacial marine reservoir effect in this area was ~1,200 14C years, perhaps also related to the sluggish Atlantic Meridional Overturning Circulation during Heinrich Stadial 1. / Thesis (MS) — Boston College, 2017. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Earth and Environmental Sciences.

This thesis investigates the design and use of communication technologies to support long distance dating relationships (LDDRs). We focus on using co-located behaviours that hold special relational meaning as the metaphor behind the design of devices to mediate between separated partners. Social Presence is used as the main theoretical construct through which support for LDDRs is addressed. Social Presence is a phenomenological concept which refers to “the degree of salience of the other person in the interaction and the consequent salience of the interpersonal relationship” [Short et al., 1976, p. 65]. An additional concept, Closeness, is also brought in to the design problem to account for the supportive role of communication technologies between moments of synchronous contact. This thesis proposes three main arguments. The first is that individual acts of communication, through feelings of Social Presence, have an impact on a couple’s feelings of Closeness towards one another. We explore possible connections between Social Presence and Closeness through a diary study. The results of the diary study also establish that the selection of communication media impacts feelings of Social Presence. Our second argument is that a number of design facets, explored throughout the thesis, could enhance the design of communication technologies for LDDRs by increasing feelings of Social Presence. An analysis of current literature informs the development of seven prototype devices based on hand-holding, hugging, sharing notes and pillow talk. Two interview studies explore people’s reactions to these devices. The findings from these studies are integrated into a design space which describes some of the design decisions that should be considered when creating behaviour-based devices which aim to support LDDRs. Our third argument is that devices based on co-located behaviours support LDDRs through engendering high levels of SP. This is investigated through five case studies using the devices we previously developed, showing that three of our devices are associated with particularly high levels of SP. They also provide insights about the design space facets, as realised in the devices, through using the devices within couples’ existing communication routines. The thesis concludes with a discussion of how the results of these studies are of relevance to researchers interested in supporting long distance dating relationships. Our investigation into Social Presence provides two main contributions; firstly it offers an understanding of how various factors (including relationship type and distance) affect feelings of SP. Secondly, it demonstrates that increasing feelings of Social Presence can have a longer-term impact on LDDRs through increasing their feelings of Closeness towards one another. This suggests that SP is suitable concept to try and support through the design of communication technologies. In addition to informing our discussion of our design space, the case studies within this thesis highlight that devices based on co-located behaviours can help support LDDRs. Given the dearth of devices based on this metaphor, we suggest that other researchers may be interested in extending these findings by exploring other behavioural metaphors. The design space proposed within this thesis offers two main contributions. Firstly, designers can use the design space to foster innovation when creating new designs. Design spaces result in a descriptive and exploratory tool for designers creating new innovations. Secondly, the comprehensive consideration of the various dimensions, especially regarding our consideration of existing communication technologies, provides researchers with a novel design-centric view over the state of the art.

Recently there has been an increase in academic scholarship focused on the lived experiences and health of transgender people; however, few studies have explored the romantic relationships of transgender individuals, particularly of transgender men. Among the general population, relationships have been shown to be central to both identity formation and as support in terms of health and wellbeing, and are therefore a potential factor of resilience of vital importance given the health disparities found among the transgender population. This dissertation is comprised of three articles investigating the dating and relationship experiences of transgender men from both individual and couple level perspectives, and employs Sexual Script Theory as a conceptual framework through which to analyze and interpret study findings. The first article provides a comprehensive review of the literature that has examined the relationships of transgender men and makes recommendations for future research to address gaps and limitations identified in these studies. The second article presents the findings from an investigation of N = 24 couples of transgender men and their cisgender female (n = 12) or male (n = 12) partners who completed in-depth qualitative, individual and dyadic interviews. The third article is a secondary analysis of data from a mixed-methods study on gender and HIV risk among N = 228 cisgender men who have sex with transgender men exploring their characteristics, attractions, identities, behaviors, relationships, sexuality, and health. Findings reported and discussed in these three articles include that transgender men and their partners, despite a number of identified barriers, form enduring and satisfying relationships. Prevailing cultural scripts of heteronormativity and homonormativity provide transgender men and their partners a blueprint for actualizing gender identity and for obtaining recognition and validation as a couple. However, these normative scripts are not always a perfect fit and include barriers to private and public affirmation of identity and fulfillment of sexual and intimacy needs. Transgender men and their partners simultaneously reinforce and challenge normative, relationship scripts, and in doing so, contribute to the evolution of social norms regarding gender and sexuality. Implications for the health and wellbeing of both transgender men and their partners are discussed.

No description available.

A diversidade de espécies e fenotípica pode variar consideravelmente entre grupos taxonômicos e ao longo do tempo em uma mesma linhagem. O estudo de tais variações tornou-se um dos principais objetivos da biologia evolutiva fornecendo informações importantes a respeito dos possíveis mecanismos que regulam a biodiversidade. Dessa forma, o objetivo geral da presente tese foi investigar os padrões da diversificação de espécies e da morfologia em um grupo cosmopolita de serpentes, a família Viperidae, e os potenciais processos subjacentes. Primeiramente, (1) reconstruímos as relações filogenéticas e estimamos os tempos de divergência entre as linhagens da família Viperidae utilizando uma abordagem Bayesiana. (2) Aplicando um método recentemente desenvolvido (BAMM), exploramos como as taxas de especiação e extinção variaram ao longo da radiação do grupo inferindo os possíveis processos reguladores. Por fim, (3) analisamos se a evolução do tamanho do corpo e as taxas de especiação variam nos diferentes habitats ocupados pelos viperídeos (terrestres vs arborícola). Nesta tese geramos a filogenia molecular de viperídeos mais completa até o momento utilizando sequências para 11 genes mitocondriais e nucleares abrangendo 79% das espécies viventes (264 terminais) e todos com exceção de um gênero. De maneira geral, foi possível obter relações filogenéticas robustas para o grupo com a maioria dos gêneros sendo monofilética. Os tempos de divergência obtidos indicam que os viperídeos começaram a diversificar em meados do Paleoceno tardio/meio do Eoceno inferindo idades um pouco mais tardias que o encontrado em estudos anteriores. Durante a radiação do grupo, um aumento nas taxas de especiação parece ter ocorrido durante a diversificação dos crotalíneos (pit vipers) em decorrência não só da evolução das fossetas loreais mas também como resultado de mudanças geológicas e climáticas na Ásia e da invasão do novo mundo. Após este rápido aumento inicial, as taxas de especiação desaceleraram em direção ao presente. Por fim, os resultados aqui apresentados indicam que apesar dos habitats arborícolas limitarem a evolução morfológica nos viperídeos, a evolução da arborealidade parece não afetar as taxas de especiação que permanecem similares entre linhagens arborícolas e terrestres. Isto sugere dois cenários: (1) a especiação acontece de forma independente das mudanças morfológicas nos viperídeos; ou (2) o isolamento geográfico seria um mecanismo importante na diversificação de linhagens arborícolas contrabalançando decréscimos nas oportunidades de especiação possivelmente relacionados às pressões seletivas impostas pelo ambiente arborícola. A presente tese contribui para entendermos mais sobre como evoluíram os viperídeos ao longo dos seus ∼50 milhões de anos. Além de propor cenários e hipóteses a serem futuramente explorados com os viperídeos, elaboramos uma discussão ampla e conceitual a respeito dos possíveis mecanismos por trás da diversificação de espécies e da morfologia que poderiam também ser contemplados para outros grupos de organismos. Portanto, a presente tese contribui não só para entendermos os mecanismos que geram e mantém a diversidade de serpentes, mas também para enriquecer a discussão dos mecanismos que geram e mantém a biodiversidade como um todo / Species and phenotypic diversity may vary considerably between taxonomic groups and through time for a given lineage. The study of such variation became one of the main goals of evolutionary biology and provides important information related to the possible mechanisms regulating biodiversity. The general goal of the present thesis was to investigate the patterns of species and morphological diversification in a cosmopolitan group of snakes, the family Viperidae, and the potential underlying processes. First, (1) we estimated the phylogenetic relationships and divergence times between lineages of the family Viperidae using a Bayesian approach; then we (2) applyed a recently developed method (BAMM) to explore how speciation and extinction rates varied during the radiation of the group suggesting possible underlying processes. Finally, (3) we analyzed if body size evolution and speciation rates showed distinct patterns among vipers occurring in different habitats (terrestrial vs arboreal). Herein we generated the most complete molecular phylogeny for vipers until this moment using sequences from 11 mitochondrial and nuclear genes comprising 79% of extant species (264 terminals) and all except one genus. In general, we were able to recover well supported phylogenetic relationships with most genera being monophyletic. Divergence time estimates suggested that vipers started to diversify around the late Paleocene/middle Eocene finding older ages than previous studies. During the group radiation, an increase in speciation rates seems to have occurred during the diversification of crotalines (pit vipers) not only due to the evolution of loreal pits but also as a result of climatic and geological changes in Asia and the invasion of the New World. After this rapid initial increase, speciation rates decelerated toward the present. Lastly, the results presented here suggest that although arboreal habitats constrain morphological evolution in vipers the evolution of arboreality does not seem to affect speciation rates, which remain similar among arboreal and terrestrial lineages. Our results suggest two distinct scenarios: (1) speciation could be independent of morphological evolution in vipers; or (2) geographic isolation would be an important mechanism underlying species diversification in arboreal lineages offsetting decreases in speciation opportunities potentially related to the selective pressures imposed by the arboreal environment. The present thesis contribute to increase our understanding about how vipers evolved during their ∼50 million years. In addition to providing scenarios and hypotheses to be further explored with vipers, we elaborated a broad and conceptual discussion about the possible mechanisms underlying species and morphological diversification that might apply to other groups of organisms. Therefore, this thesis comprises a contribution that goes beyond the understanding of mechanisms generating and maintaining the diversity of snakes, but will hopefuly enrich the discussion of mechanisms that generate and maintain biodiversity as a whole