scholarly journals Sociogenetic Organization of the Red Honey Ant (Melophorus bagoti)

Insects ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 755
Author(s):  
Nathan Lecocq de Pletincx ◽  
Serge Aron
Keyword(s):  
Inclusive Fitness ◽  
Small Sample ◽  
Worker Reproduction ◽  
Future Research ◽  
Inclusive Fitness Theory ◽  
Morphometric Analyses ◽  
Dna Microsatellite ◽  
Reproductive Altruism ◽  
Dna Microsatellite Markers ◽  
Melophorus Bagoti

Kin selection and inclusive fitness are thought to be key factors explaining the reproductive altruism displayed by workers in eusocial insect species. However, when a colony’s queen has mated with <2 males, workers may increase their fitness by producing their own male offspring. Conversely, when the queen has mated with ≥2 males, workers are expected to increase their inclusive fitness by eschewing the production of their sons and preventing other workers from reproducing as well. Here, we investigated sociogenetic structure and worker reproduction in the red honey ant, Melophorus bagoti. Morphometric analyses revealed that workers belong to one of two distinct subcastes: they are either majors or minors. Using DNA microsatellite markers, we showed that all the colonies had a single, multiple-mated queen and that there was no relationship between worker patriline and worker subcaste. Furthermore, we found that workers were producing males in the presence of the queen, which contrasts with the predictions of inclusive fitness theory. Although our results are based on a small sample, they can serve as the foundation for future research examining worker reproduction in M. bagoti.

Depressive Traits and Theory of Mind in Healthy Individuals: A Mediation Study

2018 ◽  
Author(s):  
Nicholas James Rowark
Keyword(s):  
Theory Of Mind ◽  
Executive Functions ◽  
Executive Control ◽  
Statistical Power ◽  
Social Cognitive ◽  
Clinical Sample ◽  
Small Sample ◽  
Future Research ◽  
Healthy Individuals ◽  
Prepotent Response

Depression has been associated with poor social cognitive functioning, including impaired performance on measures of theory of mind. However, the association between depression and theory of mind performance has been removed when controlling for differences in executive functioning, which is also impacted by depression. Among these executive functions, inhibition of prepotent response has been demonstrated as enabling success on theory of mind tests. In the context of these findings, the current investigation tested whether a relationship could be found between depressive traits and theory of mind in a non-clinical sample, and whether this relationship was mediated by differences in executive control of inhibition. Theory of mind was assessed in 31 healthy individuals using an audio-presented false-belief reasoning task, which also tested baseline performance in non-mental-state reasoning. Inhibition of prepotent response was assessed with interference measures on a Stroop colour-word task, and depressive traits were self-reported through the second version of the Beck Depression Inventory. Mediation analysis revealed that executive control of inhibition did not significantly mediate an indirect effect of depressive traits on theory of mind. It was interpreted that relationships previously found between major depression, executive and social-cognitive functions do not generalise beyond clinical boundaries. However, these findings are discussed in terms of the small sample size, limiting statistical power, and several methodological limitations. Future research should assess the relationship between depressive traits and theory of mind using alternative measures of mental representation, or include a neurocognitive battery assessing executive functions other than inhibition.

Social Evolution, Hamilton’s Rule, and Inclusive Fitness

2018 ◽  
Author(s):  
Samir Okasha
Keyword(s):  
Social Behaviour ◽  
Social Evolution ◽  
Inclusive Fitness ◽  
Popular Approach ◽  
Hamilton’S Rule ◽  
Inclusive Fitness Theory ◽  
The Social ◽  
Social Encounters ◽  
The Individual ◽  
Hamilton's Rule

Inclusive fitness theory, originally due to W. D. Hamilton, is a popular approach to the study of social evolution, but shrouded in controversy. The theory contains two distinct aspects: Hamilton’s rule (rB > C); and the idea that individuals will behave as if trying to maximize their inclusive fitness in social encounters. These two aspects of the theory are logically separable but often run together. A generalized version of Hamilton’s rule can be formulated that is always true, though whether it is causally meaningful is debatable. However, the individual maximization claim only holds true if the payoffs from the social encounter are additive. The notion that inclusive fitness is the ‘goal’ of individuals’ social behaviour is less robust than some of its advocates acknowledge.

scholarly journals The Role of Dopamine Receptor D2 in Bridging the Intention-Behavior Gap in Sport Participation

2021 ◽  
Vol 18 (5) ◽  
pp. 2379
Author(s):  
Seiyeong Park ◽  
Junhye Kwon ◽  
Chiyoung Ahn ◽  
Hae-Sung Cho ◽  
Hyo Youl Moon ◽  
...  
Keyword(s):  
University Students ◽  
Dopamine Receptor ◽  
Sport Participation ◽  
Small Sample Size ◽  
Behavioral Model ◽  
Small Sample ◽  
Male Students ◽  
Future Research ◽  
Dopamine Receptor D2 ◽  
The Impact

Previous studies have identified that a behavior can occur through the strongest predictor intention, but there is a gap between intention and behavior. Dopamine receptor D2 (DRD2) is known to account for a variance in sporting behaviors in human and animal subjects. However, the relationship between DRD2 and sport participation has been poorly studied, and the limited available reports are inconsistent. The present study was performed to examine the impact of DRD2 on sport participation among Korean university students based on the integrated behavioral model (IBM). Data were collected from enrolled university students in Seoul (N = 45). Participants answered survey questions first, and then they gave investigators their hair to provide DNA information (i.e., the A1 allele of DRD2). DRD2 had a significant effect on sport participation, but only in male students. Male students who carried the A1 allele of DRD2 significantly participated in 105.10 min more sporting activities than male students who did not. Moreover, the effect of intention on sport participation was significantly decreased when considering DRD2. Despite the small sample size, the results of this study could be a preliminary case for a larger study and indicate the direction of future research. Our results suggest that DRD2 may have played an important role as the “actual skill” shown in the IBM.

scholarly journals The incidence and prevalence of cardiovascular diseases in gout: a systematic review and meta-analysis

2021 ◽  
Author(s):  
Peter Cox ◽  
Sonal Gupta ◽  
Sizheng Steven Zhao ◽  
David M. Hughes
Keyword(s):  
Systematic Review ◽  
Cardiovascular Disease ◽  
Cardiovascular Risk ◽  
Cardiovascular Diseases ◽  
Small Sample Size ◽  
Meta Analysis ◽  
Random Effect ◽  
Small Sample ◽  
Future Research ◽  
Increased Risk

AbstractThe aims of this systematic review and meta-analysis were to describe prevalence of cardiovascular disease in gout, compare these results with non-gout controls and consider whether there were differences according to geography. PubMed, Scopus and Web of Science were systematically searched for studies reporting prevalence of any cardiovascular disease in a gout population. Studies with non-representative sampling, where a cohort had been used in another study, small sample size (< 100) and where gout could not be distinguished from other rheumatic conditions were excluded, as were reviews, editorials and comments. Where possible meta-analysis was performed using random-effect models. Twenty-six studies comprising 949,773 gout patients were included in the review. Pooled prevalence estimates were calculated for five cardiovascular diseases: myocardial infarction (2.8%; 95% confidence interval (CI)s 1.6, 5.0), heart failure (8.7%; 95% CI 2.9, 23.8), venous thromboembolism (2.1%; 95% CI 1.2, 3.4), cerebrovascular accident (4.3%; 95% CI 1.8, 9.7) and hypertension (63.9%; 95% CI 24.5, 90.6). Sixteen studies reported comparisons with non-gout controls, illustrating an increased risk in the gout group across all cardiovascular diseases. There were no identifiable reliable patterns when analysing the results by country. Cardiovascular diseases are more prevalent in patients with gout and should prompt vigilance from clinicians to the need to assess and stratify cardiovascular risk. Future research is needed to investigate the link between gout, hyperuricaemia and increased cardiovascular risk and also to establish a more thorough picture of prevalence for less common cardiovascular diseases.

scholarly journals Community intervention strategies to reduce the impact of financial strain and promote financial well-being: a comprehensive rapid review

2021 ◽  
Vol 28 (1) ◽  
pp. 42-50
Author(s):  
Nicole M. Glenn ◽  
Lisa Allen Scott ◽  
Teree Hokanson ◽  
Karla Gustafson ◽  
Melissa A. Stoops ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Community Intervention ◽  
Well Being ◽  
Small Sample ◽  
Financial Strain ◽  
Rapid Review ◽  
Research Centre ◽  
Future Research ◽  
The Impact

Financial well-being describes when people feel able to meet their financial obligations, feel financially secure and are able to make choices that benefit their quality of life. Financial strain occurs when people are unable to pay their bills, feel stressed about money and experience negative impacts on their quality of life and health. In the face of the global economic repercussions of the COVID-19 pandemic, community-led approaches are required to address the setting-specific needs of residents and reduce the adverse impacts of widespread financial strain. To encourage evidence-informed best practices, a provincial health authority and community-engaged research centre collaborated to conduct a rapid review. We augmented the rapid review with an environmental scan and interviews. Our data focused on Western Canada and was collected prior to the pandemic (May–September 2019). We identified eight categories of community-led strategies to promote financial well-being: systems navigation and access; financial literacy and skills; emergency financial assistance; asset building; events and attractions; employment and educational support; transportation; and housing. We noted significant gaps in the evidence, including methodological limitations of the included studies (e.g. generalisability, small sample size), a lack of reporting on the mechanisms leading to the outcomes and evaluation of long-term impacts, sparse practice-based data on evaluation methods and outcomes, and limited intervention details in the published literature. Critically, few of the included interventions specifically targeted financial strain and/or well-being. We discuss the implications of these gaps in addition to possibilities and priorities for future research and practice. We also consider the results in relation to the COVID-19 pandemic and its economic consequences.

scholarly journals Inclusive Fitness Theory from Darwin to Hamilton

Genetics ◽  
2007 ◽  
Vol 176 (3) ◽  
pp. 1375-1380
Author(s):  
Lee Alan Dugatkin
Keyword(s):  
Inclusive Fitness ◽  
Inclusive Fitness Theory

scholarly journals Changes in the Food-Related Behaviour of Italian Consumers during the COVID-19 Pandemic

Foods ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 169
Author(s):  
Rosa Maria Fanelli
Keyword(s):  
Standard Deviation ◽  
Food Consumption ◽  
Consumer Behaviour ◽  
Eating Habits ◽  
Small Sample ◽  
Future Research ◽  
Critical Approach ◽  
Pilot Survey

The principal aim of this study is to explore the effects of the first lockdown of the Coronavirus Disease 2019 (COVID-19) pandemic on changes in food consumption and food-related behaviour on a diverse sample of Italian consumers aged ≥18 years. To achieve this aim, the research path starts with an investigation of some of the first few studies conducted on Italian consumers. It then reports the findings of a pilot survey carried out on a small sample of Italian consumes who live in Molise. The studies chosen for investigation were published as articles or research reports. In total, six relevant studies were chosen, each involving a different sized sample of Italian consumers. The average number of respondents is 2142, with a standard deviation of 1260.56. A distinction is made between the results of the articles, the research reports, and the pilot survey. The latter was conducted to develop and validate the components of a new questionnaire and, furthermore, to assess changes in the eating habits of individuals during the COVID-19 pandemic. The results suggest that the effects of the pandemic on consumer behaviour can, above all, be grouped into changes related to shopping for food, eating habits, and food-related behaviour. This article can serve as the basis for future research in this area as it identifies and highlights key changes, in addition to comparing the earliest evidence available, using a critical approach.

The quality of research exploring in-session measures of CBT competence: a systematic review

2021 ◽  
pp. 1-17
Author(s):  
Kathryn Rayson ◽  
Louise Waddington ◽  
Dougal Julian Hare
Keyword(s):  
English Language ◽  
Research Training ◽  
Evidence Base ◽  
Small Sample ◽  
Measurement Properties ◽  
Future Research ◽  
Sample Sizes ◽  
Fidelity Assessment ◽  
Quality Of Research

Abstract Background: Cognitive behavioural therapy (CBT) is in high demand due to its strong evidence base and cost effectiveness. To ensure CBT is delivered as intended in research, training and practice, fidelity assessment is needed. Fidelity is commonly measured by assessors rating treatment sessions, using CBT competence scales (CCSs). Aims: The current review assessed the quality of the literature examining the measurement properties of CCSs and makes recommendations for future research, training and practice. Method: Medline, PsychINFO, Scopus and Web of Science databases were systematically searched to identify relevant peer-reviewed, English language studies from 1980 onwards. Relevant studies were those that were primarily examining the measurement properties of CCSs used to assess adult 1:1 CBT treatment sessions. The quality of studies was assessed using a novel tool created for this study, following which a narrative synthesis is presented. Results: Ten studies met inclusion criteria, most of which were assessed as being ‘fair’ methodological quality, primarily due to small sample sizes. Construct validity and responsiveness definitions were applied inconsistently in the studies, leading to confusion over what was being measured. Conclusions: Although CCSs are widely used, we need to pay careful attention to the quality of research exploring their measurement properties. Consistent definitions of measurement properties, consensus about adequate sample sizes and improved reporting of individual properties are required to ensure the quality of future research.

scholarly journals War and peace: social interactions in infections

2014 ◽  
Vol 369 (1642) ◽  
pp. 20130365 ◽  
Author(s):  
Helen C. Leggett ◽  
Sam P. Brown ◽  
Sarah E. Reece
Keyword(s):  
Species Interactions ◽  
Disease Ecology ◽  
Social Evolution ◽  
Inclusive Fitness ◽  
Experimental Tests ◽  
Microbial Pathogens ◽  
Emergent Properties ◽  
Social Strategies ◽  
Inclusive Fitness Theory ◽  
Social Behaviours

One of the most striking facts about parasites and microbial pathogens that has emerged in the fields of social evolution and disease ecology in the past few decades is that these simple organisms have complex social lives, indulging in a variety of cooperative, communicative and coordinated behaviours. These organisms have provided elegant experimental tests of the importance of relatedness, kin discrimination, cooperation and competition, in driving the evolution of social strategies. Here, we briefly review the social behaviours of parasites and microbial pathogens, including their contributions to virulence, and outline how inclusive fitness theory has helped to explain their evolution. We then take a mechanistically inspired ‘bottom-up’ approach, discussing how key aspects of the ways in which parasites and pathogens exploit hosts, namely public goods, mobile elements, phenotypic plasticity, spatial structure and multi-species interactions, contribute to the emergent properties of virulence and transmission. We argue that unravelling the complexities of within-host ecology is interesting in its own right, and also needs to be better incorporated into theoretical evolution studies if social behaviours are to be understood and used to control the spread and severity of infectious diseases.

scholarly journals Sexual Orientation Provisions in Canadian Collective Agreements

2004 ◽  
Vol 58 (4) ◽  
pp. 644-666 ◽  
Author(s):  
Travor Brown
Keyword(s):  
Sexual Orientation ◽  
Public Sector ◽  
Small Sample Size ◽  
Small Sample ◽  
Future Research ◽  
Empirical Testing ◽  
Collective Agreements ◽  
The Past ◽  
Workplace Needs ◽  
Public Sector Bargaining

Abstract The past decade has been marked by increased awareness concerning employment discrimination against gays and lesbians. Yet, to the author’s knowledge, there has been limited research regarding the response of Canadian labour organizations to the workplace needs of gay and lesbian members. Limitations of these previous studies include small sample size, lack of theoretical framework, and the absence of empirical testing of hypotheses. The present study builds on these works through the use of Craig’s model, the inclusion of multi-disciplinary research, and the empirical testing of data collected from more than 240 Canadian collective agreements. Key findings include that larger, public sector bargaining units with equality clauses in their collective agreements were most likely also to contain clauses that prohibited discrimination based on sexual orientation. The paper concludes with suggestions for future research.

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