scholarly journals Risk ratios for contagious outcomes

2018 ◽  
Vol 15 (138) ◽  
pp. 20170696 ◽  
Author(s):  
Olga Morozova ◽  
Ted Cohen ◽  
Forrest W. Crawford

Epidemiologists commonly use the risk ratio to summarize the relationship between a binary covariate and outcome, even when outcomes may be dependent. Investigations of transmissible diseases in clusters—households, villages or small groups—often report risk ratios. Epidemiologists have warned that risk ratios may be misleading when outcomes are contagious, but the nature of this error is poorly understood. In this study, we assess the meaning of the risk ratio when outcomes are contagious. We provide a mathematical definition of infectious disease transmission within clusters, based on the canonical stochastic susceptible–infective model. From this characterization, we define the individual-level ratio of instantaneous infection risks as the inferential target, and evaluate the properties of the risk ratio as an approximation of this quantity. We exhibit analytically and by simulation the circumstances under which the risk ratio implies an effect whose direction is opposite that of the true effect of the covariate. In particular, the risk ratio can be greater than one even when the covariate reduces both individual-level susceptibility to infection, and transmissibility once infected. We explain these findings in the epidemiologic language of confounding and Simpson's paradox, underscoring the pitfalls of failing to account for transmission when outcomes are contagious.

2017 ◽  
Author(s):  
Chris Aberson

Social Identity Theory contains two seemingly incompatible predictions regarding the relationship between self-esteem and ingroup bias. The first focuses on low self-esteem as motivation for bias, predicting that low self-esteem individuals exhibit more ingroup bias. The second posits that high self-esteem results from exhibiting bias, thus, high self-esteem individuals exhibit greater bias. A meta analysis examined the relationship between self-esteem and ingroup bias. Additionally, the project examined methodological issues such as the lack of consistency in measurement of self-esteem, artificial dichotomization of self-esteem scores, classification of individuals as low self-esteem, and theoretical considerations such as the use of different ingroup bias strategies and the role of social category salience. Thirty-four studies yielding 102 effect sizes from 6660 subjects were included in the analysis.Results indicated a consistent pattern whereby high self-esteem individuals exhibited more ingroup bias than did individuals with low self-esteem. However, this result was moderated by ingroup bias strategy. When using ingroup bias strategies that required ratings of ingroup superiority, high self-esteem individuals showed more ingroup bias than individuals with low self-esteem. However, when using "indirect" strategies, such as rating groups that the individual did not contribute to, differences between low and high self-esteem individuals were not found. This result leads to the conclusion that both groups exhibit ingroup bias; however, individuals with low self-esteem are limited in the types of bias they exhibit. The pattern of results held for all self-esteem measures except for the Collective Self-Esteem Scale (CSES). No differences between low and high self-esteem individuals were found when scores on the CSES defined self-esteem. These results may however be an artifact of interactions with social identity salience. Methodological shortcomings were found in the definition of low self-esteem. Individuals were most commonly classified as "low self-esteem" based on median splits of self-esteem scores. This strategy resulted in classification of some individuals as low self-esteem despite relatively high self-esteem scores. Results of the current analysis are interpreted as indicating that individual level phenomena such as self-esteem may be predictive of group level behaviors. Implications for social identity theories are discussed.


2021 ◽  
pp. 073563312110308
Author(s):  
Fan Ouyang ◽  
Si Chen ◽  
Yuqin Yang ◽  
Yunqing Chen

Group-level metacognitive scaffolding is critical for productive knowledge building. However, previous research mainly focuses on the individual-level metacognitive scaffoldings in helping learners improve knowledge building, and little effort has been made to develop group-level metacognitive scaffolding (GMS) for knowledge building. This research designed three group-level metacognitive scaffoldings of general, task-oriented, and idea-oriented scaffoldings to facilitate in-service teachers’ knowledge building in small groups. A mixed method is used to examine the effects of the GMSs on groups’ knowledge building processes, performances, and perceptions. Results indicate a complication of the effects of GMSs on knowledge building. The idea-oriented scaffolding has potential to facilitate question-asking and perspective-proposing inquiry through peer interactions; the general scaffolding does not necessarily lessen teachers’ idea-centered explanation and elaboration on the individual level; the task-oriented scaffolding has the worst effect. Pedagogical and research implications are discussed to foster knowledge building with the support of GMSs.


2021 ◽  
pp. 170-195
Author(s):  
Elena I. Rasskazova ◽  
Galina V. Soldatova ◽  
Yulia Y. Neyaskina ◽  
Olga S. Shiriaeva

Relevance. The modern society creates the image of a successful person as actively interacting with different information flows, including an impressive stream of news content. This paper assumes that there is a personal need for tracking and spreading news that develops in the interaction between person and digital world. The individual level of this need could explain the interaction with information (its critical and uncritical dissemination) and the subjective experience of its redundancy and inaccuracy, including those experiences and actions in a pandemic situation. The aim of the study was to reveal the relationship of the subjective need for news with personal values, beliefs about technologies (“technophilia”) and the dissemination of news about the pandemic. Method. 270 people (aged 18 to 61) filled out The short (Schwartz) Portrait Values Questionnaire (PVQ), Beliefs about New Technologies Questionnaire, Monitoring of Information about Coronavirus Scale as well as items on the subjective need for receiving and disseminating news, readiness for critical and non-critical dissemination of news about pandemics, subjective experiences of redundancy and distrust of pandemic-related information. Results. According to the results, the Need for News Scale allows assessing the subjective importance of receiving news and discussing them with other people and is characterized by sufficient consistency and factor validity. The need for regular news is more pronounced among men, older people, people with higher education, married people, people who have children, while the need to discuss news is not related to sociodemographic factors. For people, who are more prone to technophilia, it is more important to regularly receive and discuss news information with others, which, in turn, mediates the relationship between technophilia and monitoring news about coronavirus. The need for news dissemination mediates the relationship between technophilia and readiness for critical and non-critical dissemination of information about the pandemic.


2017 ◽  
Vol 8 (7) ◽  
pp. 816-826 ◽  
Author(s):  
Gilad Feldman ◽  
Huiwen Lian ◽  
Michal Kosinski ◽  
David Stillwell

There are two conflicting perspectives regarding the relationship between profanity and dishonesty. These two forms of norm-violating behavior share common causes and are often considered to be positively related. On the other hand, however, profanity is often used to express one’s genuine feelings and could therefore be negatively related to dishonesty. In three studies, we explored the relationship between profanity and honesty. We examined profanity and honesty first with profanity behavior and lying on a scale in the lab (Study 1; N = 276), then with a linguistic analysis of real-life social interactions on Facebook (Study 2; N = 73,789), and finally with profanity and integrity indexes for the aggregate level of U.S. states (Study 3; N = 50 states). We found a consistent positive relationship between profanity and honesty; profanity was associated with less lying and deception at the individual level and with higher integrity at the society level.


2021 ◽  
pp. 073428292110576
Author(s):  
Gordon L. Flett

While the importance of having self-esteem is widely recognized and has been studied extensively, another core component of the self-concept has been relatively neglected—a sense of mattering to other people. In the current article, it is argued that mattering is an entirely unique and complex psychological construct with great public appeal and applied significance. The various ways of assessing mattering are reviewed and evidence is summarized, indicating that mattering is a vital construct in that deficits in mattering are linked with consequential outcomes at the individual level (i.e., depression and suicidal tendencies), the relationship level (i.e., relationship discord and dissolution), and the societal level (i.e., delinquency and violence). Contemporary research is described which shows that mattering typically predicts unique variance in key outcomes beyond other predictor variables. Mattering is discussed as double-edged in that mattering is highly protective but feelings of not mattering are deleterious, especially among people who have been marginalized and mistreated. The article concludes with an extended discussion of key directions for future research and an overview of the articles in this special issue. It is argued that a complete view of the self and personal identity will only emerge after we significantly expand the scope of inquiry on the psychology of mattering.


2019 ◽  
Vol 41 (3) ◽  
pp. 592-613 ◽  
Author(s):  
Andrés Salas Vallina ◽  
Maria D. Moreno-Luzon ◽  
Anna Ferrer-Franco

PurposeThe purpose of this paper is twofold: first, to examine whether inspirational leadership of heads of specialized medical units is related to individual ambidexterity of their dependent physicians; and second, to study the possible mediating role of organizational learning capability (OLC) in the relationship between inspirational leadership and individual ambidexterity.Design/methodology/approachStructural equation modeling was used on a sample of 194 medical specialists from Spanish public hospitals.FindingsResults show that inspirational leadership is positively related to individual ambidexterity among healthcare physicians. In addition, the results of the study revealed that the relationship between inspirational leadership and individual ambidexterity is mediated by conditions that facilitate learning, namely, OLC.Research limitations/implicationsThis study uses cross-sectional data, which do not guarantee causality relationships among the examined variables.Practical implicationsThe results of this paper suggest first that heads of healthcare units should inspire followers to achieve both exploration and exploitation. Second, it is also necessary to consider that inspirational leaders promote those conditions that facilitate learning, which should be particularly taken into account to enhance both physician’s exploration and exploitation.Originality/valueIn stressing an evident gap in the relationship between leadership and ambidexterity at the individual level, this paper attempts to advance in the leadership literature by revealing how the action or power of moving the intellect or emotions, and enhancing enthusiasm and confidence, empowers physicians to both explore and exploit knowledge. The results also indicate that the inspiration transmitted by the heads of medical services, facilitate physician’s perceived learning conditions which, in turn, fosters their individual ambidexterity.


2019 ◽  
Vol 36 (11-12) ◽  
pp. 3471-3491
Author(s):  
Anthony E. Coy ◽  
Jody L. Davis ◽  
Jeffrey D. Green ◽  
Paul E. Etcheverry

A dyadic approach to studying relationship dynamics yields considerably more insights than examining each partner separately. Yet relatively little research has examined dyadic models of commitment, despite commitment being essential to relationship persistence. Accordingly, we tested a dyadic version of the investment model of commitment. In two cross-sectional studies of couples and one experiment, we tested the role of partner investments and perceived partner investments as novel antecedents of commitment. Studies 1 and 2 demonstrated that greater partner investments were related to greater levels of individuals’ commitment, while controlling for individuals’ own satisfaction with, investments in, and alternatives to the relationship. Study 3 revealed that partner-reported investments predicted commitment independent of perceived partner investments. The findings advance the investment model beyond the individual level, emphasizing the need to examine dyadic elements of relationships.


Author(s):  
Octavio Álvarez ◽  
Isabel Castillo ◽  
Vladimir Molina-García ◽  
Inés Tomás

Despite the well-known positive consequences of transformational coaches in sport, there is still little research exploring the mechanisms through which coaches’ transformational leadership exerts its impact on athletes. Multilevel SEM was used to examine the relationship between coaches’ transformational leadership style, a task-involving climate, and leadership effectiveness outcome criteria (i.e., players’ extra effort, coach effectiveness, and satisfaction with their coach), separately estimating between and within effects. A representative sample of 625 Spanish male soccer players ranging from 16 to 18 years old and nested in 50 teams completed a questionnaire package tapping the variables of interest. Results confirmed that at the team level, team perceptions of transformational leadership positively predicted teams’ perceptions of task climate, which in turn positively predicted the three outcome criteria. At the individual level, players’ perceptions of transformational leadership positively predicted teams’ perceptions of task climate, which in turn positively predicted teams’ extra effort and coach effectiveness. Mediation effects appeared at the team level for all the outcome criteria, and at the individual only for extra effort. Transformational leadership is recommended to enhance task climate, in order to increase players’ extra effort, their perceptions of the effectiveness of their coach, and their satisfaction with his/her leadership style.


2019 ◽  
Vol 29 (1) ◽  
pp. 10-13
Author(s):  
Patrick O’Donnell ◽  
Khalifa Elmusharaf

Social exclusion is a concept that has been discussed and debated in many disciplines in recent decades. In 2006 the WHO Social Exclusion Knowledge Network published a report detailing their work explaining the relevance of social exclusion to the domain of health. As part of that work, the authors formulated a complex definition of social exclusion that has proven difficult to adapt or operationalize in healthcare settings. We looked at this WHO work, and at other published evidence, and decided that social exclusion is a concept that is worth measuring at the individual level in healthcare settings. We suggest that the primary healthcare space, in particular, is an ideal setting in which to do that measurement. We have examined existing social exclusion measurement tools, and scrutinised the approaches taken by their authors, and the various domains they measured. We now propose to develop and validate such a tool for use in primary healthcare settings.


2019 ◽  
Vol 62 (1) ◽  
pp. 81-103 ◽  
Author(s):  
Jiaojiao Feng ◽  
Pengxin Xie

This study explores procedural preferences in the historical development of labour dispute resolution systems at the national level and employees’ pre-experience preference to resolve disputes at the individual level. Drawing on two datasets – one from national public statistics and one from China’s employer–employee matched data – we find that mediation has fluctuated in its use and efficacy, and it has re-emerged as an important method to stabilize labour relations. Employees choose internal mediation only if they feel that the enterprise’s mediation committee is selected fairly. Organizational structure factors, such as the enterprise’s size and the effectiveness of the Staff and Workers Representative Congress, moderate the relationship between employees’ perceptions of justice and procedural preferences. This study contributes to the dispute resolution literature by highlighting the interactions between individual perceptions of justice and organizational factors of procedural preference. Additionally, practical implications are offered to aid in the design of dispute resolution systems and improve organizational justice.


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