scholarly journals Navigating the garden of forking paths for data exclusions in fear conditioning research

2019 ◽  
Author(s):  
Tina B Lonsdorf ◽  
Maren Klingelhöfer-Jens ◽  
Marta Andreatta ◽  
Tom Beckers ◽  
Anastasia Chalkia ◽  
...  

In this report, we use fear conditioning research as an example to illustrate the considerable impact of researcher degrees of freedom with respect to exclusion of participants. In human fear conditioning research, the exclusion of substantial numbers of participants as ‘non-learners’ and ‘non-responders’ is common - despite a lack of consensus on how to define these groups.We illustrate the substantial heterogeneity in exclusion criteria based on a systematic literature search and highlight potential problems and pitfalls of different definitions through case examples based on re-analyses of existing datasets. Based on this, we propose a consensus on evidence-based rather than idiosyncratic criteria for the definition and treatment of ‘non-learners’ and ‘non-responders’ including clear guidelines on reporting details. Taken together, we illustrate how flexibility in data collection and analysis can be avoided in the field of fear conditioning, which will benefit the robustness and replicability of research findings.

eLife ◽  
2019 ◽  
Vol 8 ◽  
Author(s):  
Tina B Lonsdorf ◽  
Maren Klingelhöfer-Jens ◽  
Marta Andreatta ◽  
Tom Beckers ◽  
Anastasia Chalkia ◽  
...  

In this report, we illustrate the considerable impact of researcher degrees of freedom with respect to exclusion of participants in paradigms with a learning element. We illustrate this empirically through case examples from human fear conditioning research, in which the exclusion of ‘non-learners’ and ‘non-responders’ is common – despite a lack of consensus on how to define these groups. We illustrate the substantial heterogeneity in exclusion criteria identified in a systematic literature search and highlight the potential problems and pitfalls of different definitions through case examples based on re-analyses of existing data sets. On the basis of these studies, we propose a consensus on evidence-based rather than idiosyncratic criteria, including clear guidelines on reporting details. Taken together, we illustrate how flexibility in data collection and analysis can be avoided, which will benefit the robustness and replicability of research findings and can be expected to be applicable to other fields of research that involve a learning element.


2021 ◽  
Author(s):  
Tina B Lonsdorf ◽  
Manuel Kuhn ◽  
Anna Gerlicher

Scientific work rests fundamentally upon data, their measurement, processing, analysis, illustration and interpretation. Raw data have to be processed to be ready for statistical analyses and interpretation. While these processing pipelines can be well defined and standardized, they are often characterized by substantial heterogeneity. Here, we present results from a systematic literature search on the different SCR response quantification approaches used in the literature by using fear conditioning research as a case example. Next, we applied seven of the identified approaches (trough-to-peak scoring, script-based baseline-correction, Ledalab as well as four different models implemented in the software PsPM) to two fear conditioning datasets differing in key procedural specifications (i.e., CS duration, reinforcement rate, number of trials). This can be viewed as a set of robustness analyses (i.e., same data subjected to different methods) aiming to investigate if and to what extent these methods yield comparable results. To our knowledge, no formal framework for the evaluation of robustness analyses exists to date, but we may borrow some criteria from a framework suggested for the evaluation of ‘replicability’ in general. Our results from seven different SCR response quantification approaches applied to two datasets suggest that there may be no single approach that consistently yields larger effect sizes across both datasets. Yet, at least some of the approaches employed show consistent effect sizes within each dataset indicating comparability. Finally, we highlight substantial heterogeneity also within most quantification approaches and discuss implications and potential remedies.


Author(s):  
Spadini Putri ◽  
Muhammad Ilyas

Background: One of the health problems that can be caused by Perfluorooctanoic acid (PFOA) is Diabetes mellitus (DM). However, the causal relationship between Perfluorooctanoic acid and DM is still unclear, so it is necessary to look for some evidence regarding this relationship. The search for evidence is also equipped with a seven-step assessment of occupational diseases therefore it can assist occupational health doctors who find patients with DM and have a history of exposure to glutaraldehyde. Methods: Literature search using Pubmed, Cochrane and JSTOR databases. The keywords used are “PFOA” OR “perfluoroalkyl substances” OR “perfluorooctanoic acid” AND “diabetes mellitus”. Article selection was performed using the defined inclusion and exclusion criteria. Selected articles will be critically reviewed based on etiological studies from the Oxford Center of Evidence-Based Medicine. Result: It was in 5 selected articles that met the inclusion and exclusion criteria. The main finding after a critical review was that PFOA may increase the risk of DM. Conclusion: There is a relationship between PFOA and the incidence of DM in health workers. To establish the diagnosis of occupational diseases in health workers who are exposed to PFOA, seven steps of diagnosis of occupational diseases are used.


2005 ◽  
Vol 39 (7-8) ◽  
pp. 1214-1219 ◽  
Author(s):  
Jill S Burkiewicz ◽  
David P Zgarrick

BACKGROUND Evidence-based medicine (EBM) is the use of the current best evidence from research to make practice and policy decisions. Little is known regarding the attitudes of pharmacists toward EBM. OBJECTIVE To determine the attitudes of pharmacists toward EBM, the extent that pharmacists use evidence to make decisions, and identify barriers to the use of evidence. METHODS A self-administered questionnaire was mailed to 2000 randomly selected Illinois licensed pharmacists. The questionnaire assessed the pharmacists' attitudes toward EBM, the extent to which recommendations are based on primary and tertiary literature, and perceived barriers to the use of EBM. RESULTS Completed responses were received from 323 pharmacists (17.2% response rate). Overall, respondents had positive attitudes toward EBM (58% positive, 32% somewhat positive). Respondents thought research findings were useful (42%) or very useful (42%) to daily practice. Nearly one-half (49.8%) of respondents had conducted a primary literature search within the past year. Hospital pharmacists and pharmacists in other practice settings were more likely than community pharmacists to conduct a literature search in the past year (75%, 61%, and 30%, respectively; p < 0.001). Although 86% of respondents reported having Internet access at home, only 42% of all respondents identified that they had PubMed access at home. Common barriers to the use of EBM include lack of time (45%), physician attitudes toward pharmacist recommendations (19%), and access to resources (11%). CONCLUSIONS Pharmacist respondents have positive attitudes toward EBM and the application of research findings to practice.


2020 ◽  
Vol 29 (2) ◽  
pp. 688-704
Author(s):  
Katrina Fulcher-Rood ◽  
Anny Castilla-Earls ◽  
Jeff Higginbotham

Purpose The current investigation is a follow-up from a previous study examining child language diagnostic decision making in school-based speech-language pathologists (SLPs). The purpose of this study was to examine the SLPs' perspectives regarding the use of evidence-based practice (EBP) in their clinical work. Method Semistructured phone interviews were conducted with 25 school-based SLPs who previously participated in an earlier study by Fulcher-Rood et al. 2018). SLPs were asked questions regarding their definition of EBP, the value of research evidence, contexts in which they implement scientific literature in clinical practice, and the barriers to implementing EBP. Results SLPs' definitions of EBP differed from current definitions, in that SLPs only included the use of research findings. SLPs seem to discuss EBP as it relates to treatment and not assessment. Reported barriers to EBP implementation were insufficient time, limited funding, and restrictions from their employment setting. SLPs found it difficult to translate research findings to clinical practice. SLPs implemented external research evidence when they did not have enough clinical expertise regarding a specific client or when they needed scientific evidence to support a strategy they used. Conclusions SLPs appear to use EBP for specific reasons and not for every clinical decision they make. In addition, SLPs rely on EBP for treatment decisions and not for assessment decisions. Educational systems potentially present other challenges that need to be considered for EBP implementation. Considerations for implementation science and the research-to-practice gap are discussed.


2019 ◽  
Vol 18 (1) ◽  
pp. 1
Author(s):  
Antonio Marcos Andrade

Em 2005, o grego John Loannidis, professor da Universidade de Stanford, publicou um artigo na PLOS Medicine intitulado “Why most published research findings are false” [1]. Ele que é dos pioneiros da chamada “meta-ciência”, disciplina que analisa o trabalho de outros cientistas, avaliou se estão respeitando as regras fundamentais que definem a boa ciência. Esse trabalho foi visto com muito espanto e indignação por parte dos pesquisadores na época, pois colocava em xeque a credibilidade da ciência.Para muitos cientistas, isso acontece porque a forma de se produzir conhecimento ficou diferente, ao ponto que seria quase irreconhecível para os grandes gênios dos séculos passados. Antigamente, se analisavam os dados em estado bruto, os autores iam às academias reproduzir suas experiências diante de todos, mas agora isso se perdeu porque os estudos são baseados em seis milhões de folhas de dados. Outra questão importante que garantia a confiabilidade dos achados era que os cientistas, independentemente de suas titulações e da relevância de suas descobertas anteriores, tinham que demonstrar seus novos achados diante de seus pares que, por sua vez, as replicavam em seus laboratórios antes de dar credibilidade à nova descoberta. Contudo, na atualidade, essas garantias veem sendo esquecidas e com isso colocando em xeque a validade de muitos estudos na área de saúde.Preocupados com a baixa qualidade dos trabalhos atuais, um grupo de pesquisadores se reuniram em 2017 e construíram um documento manifesto que acabou de ser publicado no British Medical Journal “Evidence Based Medicine Manifesto for Better Health Care” [2]. O Documento é uma iniciativa para a melhoria da qualidade das evidências em saúde. Nele se discute as possíveis causas da pouca confiabilidade científica e são apresentadas algumas alternativas para a correção do atual cenário. Segundo seus autores, os problemas estão presentes nas diferentes fases da pesquisa:Fases da elaboração dos objetivos - Objetivos inúteis. Muito do que é produzido não tem impacto científico nem clínico. Isso porque os pesquisadores estão mais interessados em produzir um número grande de artigos do que gerar conhecimento. Quase 85% dos trabalhos não geram nenhum benefício direto a humanidade.Fase do delineamento do estudo - Estudos com amostras subdimensionados, que não previnem erros aleatórios. Métodos que não previnem erros sistemáticos (viés na escolha das amostras, falta de randomização correta, viés de confusão, desfechos muito abertos). Em torno de 35% dos pesquisadores assumem terem construídos seus métodos de maneira enviesada.Fase de análise dos dados - Trinta e cinco por cento dos pesquisadores assumem práticas inadequadas no momento de análise dos dados. Muitos assumem que durante esse processo realizam várias análises simultaneamente, e as que apresentam significância estatística são transformadas em objetivos no trabalho. As revistas também têm sua parcela de culpa nesse processo já que os trabalhos com resultados positivos são mais aceitos (2x mais) que trabalhos com resultados negativos.Fase de revisão do trabalho - Muitos revisores de saúde não foram treinados para reconhecer potenciais erros sistemáticos e aleatórios nos trabalhos.Em suma é necessário que pesquisadores e revistas científicas pensem nisso. Só assim, teremos evidências de maior qualidade, estimativas estatísticas adequadas, pensamento crítico e analítico desenvolvido e prevenção dos mais comuns vieses cognitivos do pensamento.


2018 ◽  
Vol 5 (2) ◽  
pp. 207-211
Author(s):  
Nazila Zarghi ◽  
Soheil Dastmalchian Khorasani

Abstract Evidence based social sciences, is one of the state-of- the-art area in this field. It is making decisions on the basis of conscientious, explicit and judicious use of the best available evidence from multiple sources. It also could be conducive to evidence based social work, i.e a kind of evidence based practice in some extent. In this new emerging field, the research findings help social workers in different levels of social sciences such as policy making, management, academic area, education, and social settings, etc.When using research in real setting, it is necessary to do critical appraisal, not only for trustingon internal validity or rigor methodology of the paper, but also for knowing in what extent research findings could be applied in real setting. Undoubtedly, the latter it is a kind of subjective judgment. As social sciences findings are highly context bound, it is necessary to pay more attention to this area. The present paper tries to introduce firstly evidence based social sciences and its importance and then propose criteria for critical appraisal of research findings for application in society.


In this first edition book, editors Jolly and Jarvis have compiled a range of important, contemporary gifted education topics. Key areas of concern focus on evidence-based practices and research findings from Australia and New Zealand. Other contributors include 14 gifted education experts from leading Australian and New Zealand Universities and organisations. Exploring Gifted Education: Australian and New Zealand Perspectives, introduced by the editors, is well organised. Jolly and Jarvis’s central thesis in their introduction is to acknowledge the disparity between policy, funding and practice in Australia and New Zealand. Specifically, in relation to Australia, they note that a coordinated, national research agenda is absent, despite recommendations published by the Australian Senate Inquiry almost 20 years ago.


2021 ◽  
Vol 41 (01) ◽  
pp. 087-095
Author(s):  
Ingrid Chaves de Souza Borges ◽  
Natália Costa Resende Cunha ◽  
Amanda Marsiaj Rassi ◽  
Marcela Garcia de Oliveira ◽  
Jacqueline Andréia Bernardes Leão-Cordeiro ◽  
...  

Abstract Objective This metanalysis aimed to evaluate the sensitivity and specificity of computed tomography colonography in colorectal polyp detection. Methods A literature search was performed in the PubMed and Web of Science databases. Results A total of 1,872 patients (males 57.2%, females 42.8%) aged 49 to 82 years old (mean age 59.7 ± 5.3 years) were included in this metanalysis. The estimated sensitivity of computed tomography colonography was 88.4% (46.3–95.7%, coefficient of variation [CV] = 28.5%) and the estimated specificity was 73.6% (47.4–100.0%, CV = 37.5%). For lesions up to 9 mm, the sensitivity was 82.5% (62.0–99.9%, CV = 25.1%) and the specificity was 79.2% (32.0–98.0%, CV = 22.9%). For lesions > 9 mm, the sensitivity was 90.2% (64.0–100.0%, CV = 7.4%) and the specificity was 94.7% (80.0–100.0%, CV = 6.2%). No statistically significant differences in sensitivity according to the size of the lesion were found (p = 0.0958); however, the specificity was higher for lesions > 9 mm (p < 0.0001). Conclusions Most of the studies analyzed in the present work were conducted before 2010, which is about a decade after computed tomography colonography started being indicated as a screening method by European and American guidelines. Therefore, more studies aimed at analyzing the technique after further technological advancements are necessary, which could lead to the development of more modern devices.


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