scholarly journals A Systematic Review on the Elicitation and Enhancement of Vection Through Tactile Stimulation

2021 ◽  
Author(s):  
Lars Kooijman ◽  
Houshyar Asadi ◽  
Shady Mohamed ◽  
Saeid Nahavandi
Keyword(s):  
Motion Sickness ◽  
Tactile Stimulation ◽  
A Priori ◽  
Visual Stimuli ◽  
Multimodal Interaction ◽  
Sensory Systems ◽  
Future Research ◽  
Illusory Perception ◽  
Definition Of ◽  
Self Motion

Vection is classically defined as the illusory perception of self-motion induced via visual stimuli. The utility of vection research lies in its potential to enhance simulation fidelity as measured through presence and reduce the probability that motion sickness symptoms occur through the identification of differences and similarities in physiological responses to vection and motion sickness. Recent studies have shown a multimodal interaction of various sensory systems in facilitating vection. Moreover, the utility of co-stimulating some of these sensory systems along with the presentation of visual stimuli have been reviewed. However, a review on the tactile mediation of vection appears to be missing from literature. The purpose of this review is to evaluate the current methodologies, and utility of, tactile stimulation in vection research. We searched for articles through EBSCOHost, Scopus and Web of Science. Only studies were included wherein an experiment on the effect of tactile stimulation on human self-motion perception was detailed. Twenty-three studies were obtained and distilled in tabular form. The studies reviewed presented a strong variability in the a-priori definition of vection, methodological inhomogeneity, varying approaches to the assessment of subjective vection measures and a lack of objective measures. We discuss the need for more qualitative research to reduce methodological inhomogenities, recommend future research in tactile-mediated vection to investigate stimulation to the torso, and suggest further investigation into the utility of concurrently presenting different forms of tactile stimulation.

scholarly journals Role Ambiguity in Sport Teams

2003 ◽  
Vol 25 (4) ◽  
pp. 534-550 ◽  
Author(s):  
Mark A. Eys ◽  
Albert V. Carron ◽  
Mark R. Beauchamp ◽  
Steven R. Bray
Keyword(s):  
Role Ambiguity ◽  
A Priori ◽  
Operational Definition ◽  
General Purpose ◽  
Future Research ◽  
First Year ◽  
Individual Level ◽  
Sport Teams ◽  
Definition Of ◽  
The Individual

The general purpose of the present study was to examine the nature of role ambiguity in sport teams and to explore the construct validity of the operational definition of role ambiguity developed by Beauchamp, Bray, Eys, and Carron (2002). Role ambiguity was operationalized as a multidimensional construct (Scope of Responsibilities, Behavioral Responsibilities, Evaluation of Performance, and Consequences of Not Fulfilling Responsibilities) that occurs in two contexts, offense and defense. Consistent with the a priori hypothesis, perceptions of role ambiguity exhibited some degree of within-group consistency and group-level variability, but most of the variance in role ambiguity was seen at the individual level. Also, perceptions of role ambiguity decreased from early to late season. Finally, veteran athletes experienced less role ambiguity than first-year athletes at the beginning of the season, but not at the end. Implications of the findings and suggestions for future research are discussed.

On the Relationship Between Method and the Object of Study When Studying Religion

Numen ◽  
2014 ◽  
Vol 61 (2-3) ◽  
pp. 131-144 ◽  
Author(s):  
Cameron David Warner
Keyword(s):  
A Priori ◽  
Future Research ◽  
Cautionary Note ◽  
Definition Of ◽  
Object Of Study ◽  
Contextual Study ◽  
The Relationship

Abstract If a discipline is defined by the object of its study, then the definition of the object of study has a priori paramount importance. Studies of the evolution of the study of religion show that researchers have been unable to escape their own socio-political contexts. I begin with a brief consideration of the evolution of superstition as a means to gain perspective on the evolution of the study of religion and definitions of religion and as a cautionary note to both the contextual study of religion and the cognitive-evolutionary (ce) study of religion. I then continue with an overview of our conference, “Researching Religion: Methodological Debates in Anthropology and the Study of Religion,” at Aarhus University, and the seven articles published in this special double issue of Numen. Taken together, they reflect and address an international rupture between the contextual and the ce study of religion, and point towards productive avenues for future research.

Internal Models, Vestibular Cognition, and Mental Imagery: Conceptual Considerations

2015 ◽  
Vol 28 (5-6) ◽  
pp. 443-460 ◽  
Author(s):  
Fred W. Mast ◽  
Andrew W. Ellis
Keyword(s):  
Mental Imagery ◽  
Sensory Input ◽  
A Priori ◽  
Computational Approach ◽  
Future Research ◽  
Top Down ◽  
Spatial Perspective ◽  
Forward Models ◽  
Underlying Mechanisms ◽  
Self Motion

Vestibular cognition has recently gained attention. Despite numerous experimental and clinical demonstrations, it is not yet clear what vestibular cognition really is. For future research in vestibular cognition, adopting a computational approach will make it easier to explore the underlying mechanisms. Indeed, most modeling approaches in vestibular science include a top-down ora prioricomponent. We review recent Bayesian optimal observer models, and discuss in detail the conceptual value of prior assumptions, likelihood and posterior estimates for research in vestibular cognition. We then consider forward models in vestibular processing, which are required in order to distinguish between sensory input that is induced by active self-motion, and sensory input that is due to passive self-motion. We suggest that forward models are used not only in the service of estimating sensory states but they can also be drawn upon in an offline mode (e.g., spatial perspective transformations), in which interaction with sensory input is not desired. A computational approach to vestibular cognition will help to discover connections across studies, and it will provide a more coherent framework for investigating vestibular cognition.

A 2 × 2 Achievement Goals Questionnaire for Sport: Evidence for Factorial Invariance, Temporal Stability, and External Validity

2003 ◽  
Vol 25 (4) ◽  
pp. 456-476 ◽  
Author(s):  
David E. Conroy ◽  
Andrew J. Elliot ◽  
Scott M. Hofer
Keyword(s):  
Achievement Goals ◽  
A Priori ◽  
Temporal Stability ◽  
Avoidance Performance ◽  
Factorial Invariance ◽  
Achievement Goal ◽  
Future Research ◽  
And Performance ◽  
Definition Of ◽  
Mastery Avoidance

Achievement goals in sport have traditionally been defined according to the definition of competence alone (i.e., mastery/task, performance/ego). Emerging research and theory from the academic domain indicates that the utility of the achievement goal construct can be enhanced when the valence (i.e., approach, avoidance) of goals is also considered in conjunction with the definition of competence. The present study was designed to evaluate the psychometric properties of scores for mastery-approach, mastery-avoidance, performance-approach, and performance-avoidance goals from a measure of achievement goals in sport. The a priori 2 × 2 model fit the data better than any of the plausible alternative models. In a series of longitudinal factorial invariance and latent growth curve analyses, scores for the four subscales exhibited structural invariance, and both differential and latent mean stability over a 21-day period. Achievement goal scores conformed to theoretical predictions regarding their relationship with fear-of-failure scores. The AGQ-S would be an appropriate instrument for future research using the 2 × 2 model of achievement goals in sport, particularly for experimental/intervention research on change processes associated with achievement goals.

Applying personalized medicine to adult severe asthma

2021 ◽  
Vol 42 (1) ◽  
pp. e8-e16 ◽  
Author(s):  
Angelica Tiotiu
Keyword(s):  
Personalized Medicine ◽  
Severe Asthma ◽  
Negative Impact ◽  
Target Therapy ◽  
Asthma Management ◽  
Future Research ◽  
Biologic Therapies ◽  
Eosinophilic Asthma ◽  
Definition Of ◽  
Structured Approach

Background: Severe asthma is a heterogeneous disease that consists of various phenotypes driven by different pathways. Associated with significant morbidity, an important negative impact on the quality of life of patients, and increased health care costs, severe asthma represents a challenge for the clinician. With the introduction of various antibodies that target type 2 inflammation (T2) pathways, severe asthma therapy is gradually moving to a personalized medicine approach. Objective: The purpose of this review was to emphasize the important role of personalized medicine in adult severe asthma management. Methods: An extensive research was conducted in medical literature data bases by applying terms such as “severe asthma” associated with “structured approach,” “comorbidities,” “biomarkers,” “phenotypes/endotypes,” and “biologic therapies.” Results: The management of severe asthma starts with a structured approach to confirm the diagnosis, assess the adherence to medications and identify confounding factors and comorbidities. The definition of phenotypes or endotypes (phenotypes defined by mechanisms and identified through biomarkers) is an important step toward the use of personalized medicine in asthma. Severe allergic and nonallergic eosinophilic asthma are two defined T2 phenotypes for which there are efficacious targeted biologic therapies currently available. Non-T2 phenotype remains to be characterized, and less efficient target therapy exists. Conclusion: Despite important progress in applying personalized medicine to severe asthma, especially in T2 inflammatory phenotypes, future research is needed to find valid biomarkers predictive for the response to available biologic therapies to develop more effective therapies in non-T2 phenotype.

Prophetic Leadership Model: Conceptualizing a Prophet’s Leadership Behaviour, Leader-Follower Mutuality and Altruism to Decision Making Quality

2015 ◽  
Vol 3 (1) ◽  
pp. 93
Author(s):  
Nik Maheran Nik Muhammad
Keyword(s):  
Decision Making ◽  
Social Network ◽  
A Priori ◽  
Complex Function ◽  
Spiritual Leadership ◽  
Leadership Theory ◽  
Future Research ◽  
Leadership Model ◽  
Leadership Behaviour ◽  
Current Leadership

This article advocates that research is lacking on the connection between leadership theory and social network theory. To date, little empirical research has been conducted on leadership and social networks. Thus, the proposition of this article goes beyond traditional leadership models to advocate for a fuller and more integrative focus that is multilevel, multi-component and interdisciplinary, while recognizing that leadership is a complex function of both the organisational leaders and the followers who perform tasks, all of which subsequently leads to decision making qualities. Indeed, the current leadership model focuses on leadership behaviour and the ability to gain followers mutuality, to achieve decision making quality involving the integration of leadership and social network theories. Given the apparent mutable palette of contemporary leadership theory, this emergent construct of the leadership paradigm can expand the poles of the leadership continuum and contribute to a richer and deeper understanding of the relationships and responsibilities of leaders and followers as they relate to decision making qualities. This new construct, which is termed prophetic leadership, explores the literature of the life experiences of the prophet in the ‘Abrahamic Faith’ religion. Drawing on a priori links between the personality trait and spiritual leadership that has recently garnered the interest of scholars, the present study asserts a normative leadership theory that links the personal quality of a leader, posture and principal (based on the Prophet’s leadership behaviour) to synergy and decision making quality. Altruism is proposed to enhance relationships between leadership behaviour and decision making quality. For future research, much work needs to be done specifically aiming to (a) achieve greater clarity of construct definitions, (b) address measurement issues, and (c) avoid construct redundancy.

Prophetic Leadership Model: Conceptualizing a Prophet’s Leadership Behaviour, Leader-Follower Mutuality and Altruism to Decision Making Quality

2015 ◽  
Vol 1 (3) ◽  
pp. 93
Author(s):  
Nik Maheran Nik Muhammad
Keyword(s):  
Decision Making ◽  
Social Network ◽  
A Priori ◽  
Complex Function ◽  
Spiritual Leadership ◽  
Leadership Theory ◽  
Future Research ◽  
Leadership Model ◽  
Leadership Behaviour ◽  
Current Leadership

This article advocates that research is lacking on the connection between leadership theory and social network theory. To date, little empirical research has been conducted on leadership and social networks. Thus, the proposition of this article goes beyond traditional leadership models to advocate for a fuller and more integrative focus that is multilevel, multi-component and interdisciplinary, while recognizing that leadership is a complex function of both the organisational leaders and the followers who perform tasks, all of which subsequently leads to decision making qualities. Indeed, the current leadership model focuses on leadership behaviour and the ability to gain followers mutuality, to achieve decision making quality involving the integration of leadership and social network theories. Given the apparent mutable palette of contemporary leadership theory, this emergent construct of the leadership paradigm can expand the poles of the leadership continuum and contribute to a richer and deeper understanding of the relationships and responsibilities of leaders and followers as they relate to decision making qualities. This new construct, which is termed prophetic leadership, explores the literature of the life experiences of the prophet in the ‘Abrahamic Faith’ religion. Drawing on a priori links between the personality trait and spiritual leadership that has recently garnered the interest of scholars, the present study asserts a normative leadership theory that links the personal quality of a leader, posture and principal (based on the Prophet’s leadership behaviour) to synergy and decision making quality. Altruism is proposed to enhance relationships between leadership behaviour and decision making quality. For future research, much work needs to be done specifically aiming to (a) achieve greater clarity of construct definitions, (b) address measurement issues, and (c) avoid construct redundancy.

Positive Workplaces

2009 ◽  
pp. 578-588
Author(s):  
Fred Luthans ◽  
Carolyn M. Youssef
Keyword(s):  
Organizational Behavior ◽  
Psychological Capital ◽  
Future Research ◽  
Positive Organizational Behavior ◽  
Performance Impact ◽  
Research Directions ◽  
Future Research Directions ◽  
And Performance ◽  
Definition Of ◽  
Psychological Capacities

Over the years, both management practitioners and academics have generally assumed that positive workplaces lead to desired outcomes. Unlike psychology, considerable attention has also been devoted to the study of positive topics such as job satisfaction and organizational commitment. However, to place a scientifically based focus on the role that positivity may play in the development and performance of human resources, and largely stimulated by the positive psychology initiative, positive organizational behavior (POB) and psychological capital (PsyCap) have recently been introduced into the management literature. This chapter first provides an overview of both the historical and contemporary positive approaches to the workplace. Then, more specific attention is given to the meaning and domain of POB and PsyCap. Our definition of POB includes positive psychological capacities or resources that can be validly measured, developed, and have performance impact. The constructs that have been determined so far to best meet these criteria are efficacy, hope, optimism, and resiliency. When combined, they have been demonstrated to form the core construct of what we term psychological capital (PsyCap). A measure of PsyCap is being validated and this chapter references the increasing number of studies indicating that PsyCap can be developed and have performance impact. The chapter concludes with important future research directions that can help better understand and build positive workplaces to meet current and looming challenges.

A Deep Motion Sickness Predictor Induced by Visual Stimuli in Virtual Reality

2020 ◽  
pp. 1-13
Author(s):  
Jinwoo Kim ◽  
Heeseok Oh ◽  
Woojae Kim ◽  
Seonghwa Choi ◽  
Wookho Son ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Motion Sickness ◽  
Visual Stimuli

scholarly journals Validity of the Gender Dysphoria diagnosis and incidence trends in Sweden: a nationwide register study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Malin Indremo ◽  
Richard White ◽  
Thomas Frisell ◽  
Sven Cnattingius ◽  
Alkistis Skalkidou ◽  
...  
Keyword(s):  
Gender Dysphoria ◽  
Age Groups ◽  
Medical Intervention ◽  
Future Research ◽  
Advantages And Disadvantages ◽  
Incidence Trends ◽  
Interaction Terms ◽  
Definition Of ◽  
The Individual ◽  
Nationwide Register Study

AbstractThe aim of this study was to examine the validity of the Gender Dysphoria (GD) diagnoses in the Swedish National Patient Register (NPR), to discuss different register-based definitions of GD and to investigate incidence trends. We collected data on all individuals with registered GD diagnoses between 2001 and 2016 as well as data on the coverage in the NPR. We regarded gender confirming medical intervention (GCMI) as one proxy for a clinically valid diagnosis and calculated the positive predictive value (PPV) for receiving GCMI for increasing number of registered GD diagnoses. We assessed crude and coverage-adjusted time trends of GD during 2004–2015 with a Poisson regression, using assigned sex and age as interaction terms. The PPV for receiving GCMI was 68% for ≥ 1 and 79% for ≥ 4 GD-diagnoses. The incidence of GD was on average 35% higher with the definition of ≥ 1 compared to the definition of ≥ 4 diagnoses. The incidence of GD, defined as ≥ 4 diagnoses increased significantly during the study period and mostly in the age categories 10–17 and 18–30 years, even after adjusting for register coverage. We concluded that the validity of a single ICD code denoting clinical GD in the Swedish NPR can be questioned. For future research, we propose to carefully weight the advantages and disadvantages of different register-based definitions according to the individual study’s needs, the time periods involved and the age-groups under study.

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