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Mourad El Karkri; Antonio Quesada; Marta Romero-Ariza – Review of Education, 2025
Until now, the conventional approach using two distinct groups, experimental and control, continues to dominate research, especially education research. Researchers, particularly those who are active in this domain, readily recognise this pattern when surveying literature. This article explores the use of the Solomon four-group design as a…
Descriptors: Educational Research, Research Methodology, Experimental Groups, Control Groups
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Heining Cham; Hyunjung Lee; Igor Migunov – Asia Pacific Education Review, 2024
The randomized control trial (RCT) is the primary experimental design in education research due to its strong internal validity for causal inference. However, in situations where RCTs are not feasible or ethical, quasi-experiments are alternatives to establish causal inference. This paper serves as an introduction to several quasi-experimental…
Descriptors: Causal Models, Educational Research, Quasiexperimental Design, Research Design
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Melanie Arnold; Stacie Merritt; Kathryn Mears; Anna Bryan; Jane Bryce – Research Ethics, 2024
This article describes our efforts to screen and enrol clinical trial participants conscientiously in the COVID-19 pandemic setting. We present the standard screening and enrolment process prior to, and our process of adapting to, the pandemic. Our goal was to develop a way to screen and enrol people for clinical trials that was both equitable and…
Descriptors: COVID-19, Pandemics, Experimental Groups, Control Groups
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Simon Šuster; Timothy Baldwin; Karin Verspoor – Research Synthesis Methods, 2024
Existing systems for automating the assessment of risk-of-bias (RoB) in medical studies are supervised approaches that require substantial training data to work well. However, recent revisions to RoB guidelines have resulted in a scarcity of available training data. In this study, we investigate the effectiveness of generative large language…
Descriptors: Medical Research, Safety, Experimental Groups, Control Groups
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Ning Wang; Haibin Wang; Yu Bai; Yilu Zhao; Xiangyu Zheng; Xuping Gao; Zifeng Zhang; Li Yang – Journal of Attention Disorders, 2024
Objective: Although ADHD is highly heritable, some environmental factors contribute to its development. Given the growing evidence that gut microbiota was involved in psychiatric disorders, we aimed to identify the characteristic composition of the gut microbiota in ADHD. Methods: We recruited 47 medication-naive children and adolescents with…
Descriptors: Human Body, Microbiology, Attention Deficit Hyperactivity Disorder, Genetics
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Shifeng Liu; Florence T. Bourgeois; Claire Narang; Adam G. Dunn – Research Synthesis Methods, 2024
Searching for trials is a key task in systematic reviews and a focus of automation. Previous approaches required knowing examples of relevant trials in advance, and most methods are focused on published trial articles. To complement existing tools, we compared methods for finding relevant trial registrations given a International Prospective…
Descriptors: Artificial Intelligence, Medical Research, Experimental Groups, Control Groups
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Yin Kiong Hoh – American Biology Teacher, 2025
Stem cell therapy, a cutting-edge technology, aims to replace damaged cells with healthy ones. Stem cells possess the remarkable ability to multiply and differentiate into various cell types, making them ideal candidates for regenerative medicine. This therapy holds promise for treating a wide range of conditions and injuries. In this review, I…
Descriptors: Embryology, Biotechnology, Biomedicine, Cytology
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Youmi Suk; Youjin Lee – Society for Research on Educational Effectiveness, 2024
Background/Context: Some observational studies involve multiple layers of treatment selection, specifically in the context of the extended time accommodation (ETA) for English language learners (ELLs). In ETA settings, the first selection occurs due to the eligibility rule, where students whose ELL English proficiency is below a certain threshold…
Descriptors: Evidence, Regression (Statistics), Research Design, Control Groups
Shawndra Lyn Fordham – ProQuest LLC, 2024
Integrating Course-based Undergraduate Research Experiences (CUREs) into introductory STEM courses at the university level has been recognized as important in increasing persistence in STEM. A significant area of attrition from the STEM pathway, however, occurs during secondary school when student interest in STEM rapidly declines. In this study,…
Descriptors: STEM Education, Secondary School Students, Learner Engagement, Student Research
Joao M. Souto-Maior; Kenneth A. Shores; Rachel E. Fish – Annenberg Institute for School Reform at Brown University, 2025
Whether selection processes contribute to group-level disparities or merely reflect pre-existing inequalities is an important societal question. In the context of observational data, researchers, concerned about omitted-variable bias, assess selection-contributing inequality via a kitchen-sink approach, comparing selection outcomes of…
Descriptors: Control Groups, Predictor Variables, Correlation, Selection Criteria