The relationship between perception of effort and physiological responses to an acute fatiguing task of the elbow flexors. Evaluation of a new rating scale of perception of effort

This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.While fatigue is a common daily phenomenon, the exact relationship between perception of effort and fatigue is still unknown. Existing tools for assessing perception of effort are effectively limited to whole body exercise, while current methods for assessing voluntary activation are painful and not feasible for clinical application. The main aims of this thesis were to evaluate existing methodologies for their appropriateness in assessing perception of effort and voluntary activation following isolated muscle function testing, and to examine the relationship between subjective perception of effort and objective changes in the healthy motor control system. The implementation of reliable and valid assessment tools in clinical practice may enable clarification of the pathogenesis of many neurological conditions that have chronic fatigue as a key feature. Four studies of within-subjects repeated measures design have been conducted. Sixtynine healthy volunteers were recruited among staff and students of Brunel University. Magnetic stimulation was tested as a valid alternative to electrical stimulation in the conventional single-pulse Twitch Interpolation Technique. The 0–10 Numeric Rating Scale (NRS) was also tested for its reliability and validity in assessing the perception of effort during isometric exercise of elbow flexors. The changes of perception of effort following a submaximal elbow flexion fatiguing task, as well as following transcranial direct current stimulation (tDCS) over the motor cortex were also tested. The main findings showed significant differences between peripheral and magnetic stimulation in conventional single-pulse Twitch Interpolation Technique. The 0–10 NRS demonstrated linear properties and reported excellent test-retest reliability and good concurrent criterion validity in recording perception of effort under repeated isometric contractions of elbow flexors. Ten minutes of a submaximal intermittent isometric fatiguing exercise produced a significant elevation in rating of perceived effort, which was associated with central and peripheral neurophysiological changes of the motor control system. In contrast, perception of effort did not change significantly following 10 minutes of tDCS. The major findings of this thesis suggest the 0–10 NRS is a valid and reliable scale for rating perception of effort in healthy individuals. Further testing of the scale on patients is needed to establish its validity in clinical settings. Additionally, the findings indicate a substantial role of perception of effort in the voluntary motor control system. However, further research towards revealing the underlying mechanisms of perceived effort regulation in both health and disease is required

Impersonal you and stance-taking in social research interviews

The pronoun you is prototypically used to refer to the addressee or addressees in an interaction, but it also has other uses, including a kind of impersonal reference that does not pick out any particular person, but is the equivalent of someone, anyone, or one. This paper focuses on how the shift to an impersonal you works in one genre of interaction, research interviews by academic social science researchers, where the participants often use you where the previous turn might have projected the use of I or they. We argue that the shift, and related cues of the dimension of specific vs. general, can be seen as a form of stance-taking. We explore three possible functions: (1) recategorising of the speaker and their category-associated experiences, (2) displaying perceptions as shared, not merely individual, and (3) invoking commonplaces to deal with dilemmas posed by the question. These rhetorical actions can be related to the demands of the research interview, with the interviewee claiming or disclaiming an entitlement to have a stance, supporting their stances against possible challenge, and giving accounts or resisting judgments of the interviewee's behaviour or views. Attention to these shifts can make social science researchers more aware of the interactions underlying the transcripts

China Virus, Kung Flu, and MAGA: Countervalues and sociological fractionation on Twitter as evidenced by pro- and anti-Trump discourses in relation to Covid-19

This paper seeks to investigate the indexical links (Silverstein, 2003) to social values activated by terms like “covid” and “virus” in tweets from users with opposing political leanings. Our data comes from a corpus of 12,607 tweets collected in both May and August 2020. We focus on tweets containing “Trump”, as these occurred frequently throughout the corpus, to assess the ways in which Twitter users engage with discourses surrounding Covid-19 relative to the then-US President. Focusing on the local contexts of the tweets we, first, demonstrate the contrasting social values indexed by specific keywords and hashtags. We refer to these as countervalues (Bearth, 2005) that illustrate the multiple and competing valorisations of terms for Covid-19 and which lead to the reproduction of two main contrasting discourses. The first illustrates that Covid-19 is “fake”, “a hoax”, and is explicitly linked indexically with China and tends to appear in tweets by pro-Trump users. A second set of discourses emerges in opposition to the pro-Trump tweets where categorisations of the virus as fake or a hoax are described by users as moronic, links to China are described as racist, and users demonstrate an explicitly anti-Trump ideology. We conclude that the recirculation of these discourses is evidence of sociological fractionation (Agha, 2007), as we see the pro-Trump group resisting the scheme of values put forward by the anti-Trump group. To this end, we contribute to the body of research that sheds light on the participatory frameworks enabled by social media affordances

Comorbidities of deformational plagiocephaly in infancy:a scoping review protocol

Introduction Deformational plagiocephaly (DP) is one of the most common cranial shape disorders in infancy. It is characterised by unilateral flattening of the skull due to head preference to one side. The literature suggests that DP is associated with comorbidities such as developmental delay, but the nature and prevalence of the comorbid impairments are still unclear and controversial. Therefore, our scoping review (ScR) aims to explore systematically the extent and nature of literature by identifying, mapping and categorising the most relevant comorbidities of DP in children up to the age of 2 years.Methods and analysis This protocol is based on the framework outlined by Arksey and O’Malley. A systematic search will be conducted to identify relevant full text studies from 1992 to 2021 using the databases of Cochrane, MEDLINE, Google Scholar, EMBASE, PubMed and University of Nicosia EBSCO. Two independent reviewers will screen abstracts and full articles in parallel, using specific inclusion and exclusion criteria. Specifically, this review will consider studies investigating DP and relevant comorbidities in children up to the age of 2 years of life without craniosynostosis, torticollis and any other diagnosed neurodevelopmental deficiency.The Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for ScR Checklist will be considered for results’ analysis and reporting. The results will be described in a narrative form in relation to the research question and in the context of the overall study purpose.Ethics and dissemination Research ethics approval is not required for this ScR since data will be retrieved from publicly available studies. Dissemination activities will include research findings’ submission for publication in a relevant peer-reviewed journal and presentation of the results at relevant conferences.Registration Our protocol was registered prospectively with the Open Science Framework (https://osf.io/48am3/)

‘Hosting refugees is the most rewarding experience’: migrant identity and affective positioning in curated NGO stories

This study explores positive migrant storytelling in non-governmental organizations’ advocacy campaigns. We focus on the practices and implications of leveraging storytelling towards charity organizations’ institutional goals. Drawing upon critical discourse studies and narrative studies, we propose a critical storytelling approach that pays attention to the specific nature of storytelling as a discourse practice in itself. We focus on a UNHCR human-interest story of refugee displacement and subsequent integration into the UK. We employ the heuristic concept of positioning that calls for analysis at different, though interrelated levels of narrative activity, to explore how affect is mobilized and the specific identity categories and affect types that are created for migrants and their hosts. We then situate these identity positions in wider dominant discourses of migrant integration. We show that the story foregrounds emblematic refugees, worthy of hosts’ support as well as relationships of dependence between migrants and the host society as requisites to successful integration. We argue that the ways in which an individual refugee story gets mobilized as an exemplary story reveals canonized forms of positive migrant storytelling emerging in the UK context that end up invoking dominant power asymmetries in relation to migration and British integration

The relationship between perception of effort and physiological responses to an acute fatiguing task of the elbow flexors : evaluation of a new rating scale of perception of effort

While fatigue is a common daily phenomenon, the exact relationship between perception of effort and fatigue is still unknown. Existing tools for assessing perception of effort are effectively limited to whole body exercise, while current methods for assessing voluntary activation are painful and not feasible for clinical application. The main aims of this thesis were to evaluate existing methodologies for their appropriateness in assessing perception of effort and voluntary activation following isolated muscle function testing, and to examine the relationship between subjective perception of effort and objective changes in the healthy motor control system. The implementation of reliable and valid assessment tools in clinical practice may enable clarification of the pathogenesis of many neurological conditions that have chronic fatigue as a key feature. Four studies of within-subjects repeated measures design have been conducted. Sixtynine healthy volunteers were recruited among staff and students of Brunel University. Magnetic stimulation was tested as a valid alternative to electrical stimulation in the conventional single-pulse Twitch Interpolation Technique. The 0–10 Numeric Rating Scale (NRS) was also tested for its reliability and validity in assessing the perception of effort during isometric exercise of elbow flexors. The changes of perception of effort following a submaximal elbow flexion fatiguing task, as well as following transcranial direct current stimulation (tDCS) over the motor cortex were also tested. The main findings showed significant differences between peripheral and magnetic stimulation in conventional single-pulse Twitch Interpolation Technique. The 0–10 NRS demonstrated linear properties and reported excellent test-retest reliability and good concurrent criterion validity in recording perception of effort under repeated isometric contractions of elbow flexors. Ten minutes of a submaximal intermittent isometric fatiguing exercise produced a significant elevation in rating of perceived effort, which was associated with central and peripheral neurophysiological changes of the motor control system. In contrast, perception of effort did not change significantly following 10 minutes of tDCS. The major findings of this thesis suggest the 0–10 NRS is a valid and reliable scale for rating perception of effort in healthy individuals. Further testing of the scale on patients is needed to establish its validity in clinical settings. Additionally, the findings indicate a substantial role of perception of effort in the voluntary motor control system. However, further research towards revealing the underlying mechanisms of perceived effort regulation in both health and disease is required.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

A comparative study of cognitive behavioural therapy and shared reading for chronic pain

The case for psychosocial interventions in relation to chronic pain, one of the most common health issues in contemporary healthcare, is well-established as a means of managing the emotional and psychological difficulties experienced by sufferers. Using mixed methods, this study compared a standard therapy for chronic pain, cognitive behavioural therapy (CBT), with a specific literature-based intervention, shared reading (SR) developed by national charity, The Reader. A 5-week CBT group and a 22-week SR group for patients with chronic pain ran in parallel, with CBT group members joining the SR group after the completion of CBT. In addition to self-report measures of positive and negative affect before and after each experience of the intervention, the 10 participants kept twice-daily (12- hourly) pain and emotion diaries. Qualitative data were gathered via literary-linguistic analysis of audio/video�recordings and transcriptions of the CBT and SR sessions and video-assisted individual qualitative interviews with participants. Qualitative evidence indicates SR’s potential as an alternative or long-term follow-up or adjunct to CBT in bringing into conscious awareness areas of emotional pain otherwise passively suffered by patients with chronic pain. In addition, quantitative analysis, albeit of limited pilot data, indicated possible improvements in mood/pain for up to 2 days following SR. Both findings lay the basis for future research involving a larger sample siz

Stance-taking in interviews from the Qualidata Archive

Researchers in several disciplines have argued that a social science interview should be seen as a product of situated interaction, rather than as the elicitation of the interviewee's pre-existing cognitive state. We propose an approach for analysis of this interaction based on studies of stance-taking and of responses to questions. Studies of stance-taking can help us understand the process of elicitation; in these studies, expressing one's evaluation of an object is seen as an inherently dialogical act that involves positioning oneself, defining a shared object, and aligning or not with previous stance-taking. Studies of responses to questions can help us apply these general analyses of stance-taking in dialogue to the specific genre of the research interview. In this article, we analyse existing transcripts from the Qualidata Archive and focus on the devices interviewees have for showing that they are taking up the question, and for aligning or disaligning with the stance projected in it, and the devices used by interviewers in follow-up questions to recalibrate the object of stance-taking. Since we focus on the lexical and syntactic form of elicitations, responses, and follow-ups, the approach can be applied, with some important caveats, to typical social science research transcripts, not just to specially retranscribed interviews

Epilogue

This volume brings together studies investigating diverse semiotic strategies through which liquid racism emerges, which consists of ambiguities and contradictory interpretations due to the fact that racist views infiltrate discourse ..