Apps and Autonomy: Perceived Interactivity and Autonomous Regulation in mHealth Applications

Thousands of smartphone apps geared toward monitoring health behaviors are released regularly. Even as developers flood the market with mHealth apps, consumers seem overwhelmed with choices and report lack of sustained use, which raises questions about their efficacy. An online survey (N = 513) found that perceived interactivity not only has a direct effect but also exerts an indirect effect via greater autonomous regulation on users’ attitudes and behavioral intentions toward mHealth apps. Frequency of tracking and updating personal data showed significant effects on behavioral intentions. Theoretical and practical suggestions for the design and evaluation of mHealth apps are discussed

Who Posted That Story? Processing Layered Sources in Facebook News Posts

With social media platforms becoming primary news sources, concerns about credibility judgments and knowledge grow. This study (N = 233) experimentally tests the effects of multiple source cues on Facebook news posts on credibility and knowledge. Judgments of story credibility were directly influenced by media source cues, but not friend source cues. Involvement in the source topic moderated the effects of these source cues, such that particular combinations influenced credibility differently, and also influenced cognitive elaboration about the topic. Theoretical implications for cognitive mediation model of learning from the news and the heuristic-systematic model of information processing are presented

Examining Twitter Content of State Emergency Management During Hurricane Joaquin

Those tasked with disseminating life-protecting messages during crises have many factors to consider. Social media sites have become an information source for individuals during these times, and more research is needed examining the use of specific message strategies by emergency management agencies that may elicit attention and retransmission. This study examines Twitter content concerning Hurricane Joaquin. Content analysis of tweets from state emergency management accounts was performed to provide an overview of the content and stylistic elements used in tweets associated with the event. The findings are discussed in the context of both past research on the matter and implications for emergency management agencies responding to high-consequence events

Prospectus, August 26, 1985

https://spark.parkland.edu/prospectus_1985/1015/thumbnail.jp

Chagasic Thymic Atrophy Does Not Affect Negative Selection but Results in the Export of Activated CD4+CD8+ T Cells in Severe Forms of Human Disease

Extrathymic CD4+CD8+ double-positive (DP) T cells are increased in some pathophysiological conditions, including infectious diseases. In the murine model of Chagas disease, it has been shown that the protozoan parasite Trypanosoma cruzi is able to target the thymus and induce alterations of the thymic microenvironment and the lymphoid compartment. In the acute phase, this results in a severe atrophy of the organ and early release of DP cells into the periphery. To date, the effect of the changes promoted by the parasite infection on thymic central tolerance has remained elusive. Herein we show that the intrathymic key elements that are necessary to promote the negative selection of thymocytes undergoing maturation during the thymopoiesis remains functional during the acute chagasic thymic atrophy. Intrathymic expression of the autoimmune regulator factor (Aire) and tissue-restricted antigen (TRA) genes is normal. In addition, the expression of the proapoptotic Bim protein in thymocytes was not changed, revealing that the parasite infection-induced thymus atrophy has no effect on these marker genes necessary to promote clonal deletion of T cells. In a chicken egg ovalbumin (OVA)-specific T-cell receptor (TCR) transgenic system, the administration of OVA peptide into infected mice with thymic atrophy promoted OVA-specific thymocyte apoptosis, further indicating normal negative selection process during the infection. Yet, although the intrathymic checkpoints necessary for thymic negative selection are present in the acute phase of Chagas disease, we found that the DP cells released into the periphery acquire an activated phenotype similar to what is described for activated effector or memory single-positive T cells. Most interestingly, we also demonstrate that increased percentages of peripheral blood subset of DP cells exhibiting an activated HLA-DR+ phenotype are associated with severe cardiac forms of human chronic Chagas disease. These cells may contribute to the immunopathological events seen in the Chagas disease

When Friends Share about Brands: A Study of eWOM on Social Networking Sites

Word-of-mouth marketing has been recognized as a significant factor influencing consumer behavior. Research has indicated that certain peer consumers – often known as opinion leaders or market mavens – can influence purchase intentions and product attitudes. Likewise, bandwagon cues, which signal to consumers that a product or brand is popular among others, have also been found to influence consumer decisions. To date, most eWOM studies, and particularly those examining bandwagon cues, have assessed messages from anonymous individuals in digital environments such as online review sites. To address this gap in the literature, this study explored how an individual’s judgment of a peer’s opinion leadership – specifically market mavenism – influences consumer decisions by examining eWOM from known peers within an online social network. In particular, this study aims to integrate our understanding of opinion leadership, eWOM, and bandwagon cues to gain clearer insight into how consumers are influenced by brand messages shared by friends on social media. Findings indicated messages from peers perceived to be market mavens were judged to be more credible and garnered more positive attitudes in terms of the message, as well as product and brand attitudes. These attitudes also influenced purchase intentions. However, the data did not indicate an effect for the bandwagon cue on post credibility or attitude