Negative / Null Result ReportMedicine
Steven Masson, Benjamin Marrow, Stuart Kendrick et al. · 2014 · Transplant International
Return to drinking after liver transplantation for alcoholic liver disease (ALD) remains a source of unease with varying reported rates of return to drinking and impact this has on graft function. In 2005, the UK Transplant liver advisory…
View details →Negative / Null Result ReportOpen accessSocial Sciences
Michael N. Stagnaro, Ben M Tappin, David G. Rand · 2023 · Proceedings of the National Academy of Sciences
The highly influential theory of "Motivated System 2 Reasoning" argues that analytical, deliberative ("System 2") reasoning is hijacked by identity when considering ideologically charged issues-leading people who are more likely to engage in such reasoning to be more polarized, rather than more accurate. Here, we fail to replicate the key empirical support for this theory across five contentious issues, using a large gold-standard nationally representative probability sample of Americans. While participants were more accurate in evaluating a contingency table when the outcome aligned with thei
View details →Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology
Yuan Gao, Dokyun Lee, Gordon Burtch et al. · 2025 · Proceedings of the National Academy of Sciences
Recent studies suggest large language models (LLMs) can generate human-like responses, aligning with human behavior in economic experiments, surveys, and political discourse. This has led many to propose that LLMs can be used as surrogates…
View details →Negative / Null Result ReportOpen accessMedicine
Sara Lindström, Fredrick R. Schumacher, Daniele Campa et al. · 2012 · Cancer Epidemiology Biomarkers & Prevention
BACKGROUND: A recent genome-wide association study (GWAS) of prostate cancer in a Japanese population identified five novel regions not previously discovered in other ethnicities. In this study, we attempt to replicate these five loci in a…
View details →Negative / Null Result ReportOpen accessMedicine
Linda Zaharenko, Ineta Kalniņa, Kristine Geldnere et al. · 2016 · European Journal of Endocrinology
Objective(s) High variability in clinical response to metformin is often observed in type 2 diabetes (T2D) patients, and it highlights the need for identification of genetic components affecting the efficiency of metformin therapy. Aim of…
View details →Negative / Null Result ReportOpen accessMedicine
Cerissa L. Blaney, Mark L. Robbins, Andrea L. Paiva et al. · 2012 · American Journal of Health Promotion
PURPOSE: African-Americans have high rates of physical inactivity-related morbidity and mortality, thus effective interventions to increase exercise are necessary. Tailored interventions show promise, but measures need validation in this…
View details →Negative / Null Result ReportBiochemistry, Genetics and Molecular Biology
Aditi Mathur, Matthew H. Law, Ian L. Megson et al. · 2010 · Psychiatric Genetics
OBJECTIVES: A number of studies have reported a genetic association of the AKT1 gene with schizophrenia, although some have failed to replicate the AKT1 association. This study was undertaken to further explore the AKT1 association with…
View details →Negative / Null Result ReportOpen accessDecision Sciences
Gillian Pepper, Deirdre Corby, Rachel Bamber et al. · 2017 · PeerJ
Here, we report three attempts to replicate a finding from an influential psychological study (Griskevicius et al., 2011b). The original study found interactions between childhood SES and experimental mortality-priming condition in predicting risk acceptance and delay discounting outcomes. The original study used US student samples. We used British university students (replication 1) and British online samples (replications 2 and 3) with a modified version of the original priming material, which was tailored to make it more credible to a British audience. We did not replicate the interaction b
View details →Negative / Null Result Report
Erik Litonius, Tomohisa Niiya, Pertti J. Neuvonen et al. · 2011 · Basic & Clinical Pharmacology & Toxicology
Abstract: Intravenous lipid emulsion has been used in the resuscitative treatment of intoxications caused by local anaesthetics and tricyclic antidepressants with seemingly beneficial results. We studied the effect of intravenous lipid…
View details →Negative / Null Result ReportMedicine
Þórunn Rafnar, Patrick Sulem, Søren Besenbacher et al. · 2011 · Cancer Research
Genome-wide association studies (GWAS) have identified 3 genomic regions, at 15q24-25.1, 5p15.33, and 6p21.33, which associate with the risk of lung cancer. Large meta-analyses of GWA data have failed to find additional associations of…
View details →Negative / Null Result ReportOpen accessMathematics
Mathieu Guillaumé, Christine Schiltz, Amandine Van Rinsveld · 2020 · Journal of Numerical Cognition
Basic numerical abilities are generally assumed to influence more complex cognitive processes involving numbers, such as mathematics. Yet measuring non-symbolic number abilities remains challenging due to the intrinsic correlation between numerical and non-numerical dimensions of any visual scene. Several methods have been developed to generate non-symbolic stimuli controlling for the latter aspects but they tend to be difficult to replicate or implement. In this study, we describe the NASCO method, which is an extension to the method popularized by Dehaene, Izard, and Piazza (2005). Their pro
View details →Negative / Null Result ReportOpen accessPsychology
Matt Field, Lisa Di Lemma, Paul Christiansen et al. · 2016 · Psychology of Addictive Behaviors
Alcohol dependence is characterized by conflict between approach and avoidance motivational orientations for alcohol that operate in automatic and controlled processes. This article describes the first study to investigate the predictive validity of these motivational orientations for relapse to drinking after discharge from alcohol detoxification treatment in alcohol-dependent patients. One hundred twenty alcohol-dependent patients who were nearing the end of inpatient detoxification treatment completed measures of self-reported (Approach and Avoidance of Alcohol Questionnaire; AAAQ) and auto
View details →Negative / Null Result ReportOpen accessMedicine
Camila S. Halal, Diego G. Bassani, Iná S. Santos et al. · 2020 · Journal of Sleep Research
This study used data from 2,222 mothers and infants participating in a population-based birth cohort to verify whether maternal depression in the perinatal period was associated with poor infant sleep. Mothers who scored ≥13 points on the…
View details →Replication FailureOpen accessMedicine
Päivi Merjonen, Liisa Keltikangas‐Järvinen, Markus Jokela et al. · 2011 · Translational Psychiatry
Hostility is a multidimensional personality trait with changing expression over the life course. We performed a genome-wide association study (GWAS) of the components of hostility in a population-based sample of Finnish men and women for…
View details →Negative / Null Result ReportOpen accessDecision Sciences
Anton Olsson-Collentine, Robbie C. M. van Aert, Marjan Bakker et al. · 2023 · Psychological Methods
-hacking) from this "multiverse" of outcomes can inflate effect size estimates and false positive rates. We studied the effects of researcher degrees of freedom and selective reporting using empirical data from extensive multistudy…
View details →Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology
Ismaïl Ahmed, Pei‐Chen Lee, Christina M. Lill et al. · 2014 · PLoS Genetics
The etiology of Parkinson disease (PD) involves both genetic susceptibility and environmental exposures. In particular, coffee consumption is inversely associated with PD but the mechanisms underlying this intriguing association are unknown. According to a recent genome-wide gene-environment interaction study, the inverse coffee-PD association was two times stronger among carriers of the T allele of SNP rs4998386 in gene GRIN2A than in homozygotes for the C allele. We attempted to replicate this result in a similarly sized pooled analysis of 2,289 cases and 2,809 controls from four independent
View details →Negative / Null Result ReportOpen accessPsychology
Paweł A. Atroszko, Bartosz Atroszko, Edyta Charzyńska · 2021 · International Journal of Environmental Research and Public Health
Background: Relatively strong theoretical assumptions and previous studies concerning co-occurring addictive behaviors suggest a subpopulation representing general proclivity to behavioral addictions (BAs), and there are gender-specific subpopulations. This study aimed to compare latent profile analysis (LPA) and latent class analysis (LCA) as the methods of investigating different clusters of BAs in the general student population and among students positively screened for at least one BA. Participants and procedure: Analyses of six BAs (study, shopping, gaming, Facebook, pornography, and food
View details →Negative / Null Result ReportOpen accessMedicine
David Baumeister, Wolfgang Eich, Silvia Saft et al. · 2019 · Scientific Reports
There has been a surging interest in the putative role of peripheral growth factors in the pathophysiology of fibromyalgia, specifically in the peripheral sensitization that occurs in chronic pain disorders. This cross-sectional study set out to assess and compare brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) in plasma samples from fibromyalgia patients and healthy controls. Plasma BDNF and NGF were measured in 89 fibromyalgia patients and 36 pain-free controls, and compared using ANCOVA controlling for potential confounders, as well as Bayesian methods for parameter e
View details →Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology
William R. Scott, Weihua Zhang, Marie Loh et al. · 2016 · PLoS ONE
South Asians are 1/4 of the world's population and have increased susceptibility to central obesity and related cardiometabolic disease. Knowledge of genetic variants affecting risk of central obesity is largely based on genome-wide association studies of common SNPs in Europeans. To evaluate the contribution of DNA sequence variation to the higher levels of central obesity (defined as waist hip ratio adjusted for body mass index, WHR) among South Asians compared to Europeans we carried out: i) a genome-wide association analysis of >6M genetic variants in 10,318 South Asians with focused analy
View details →Negative / Null Result ReportOpen accessEngineering
Nour El Din El Sheikh, Esteban Paz, Juan Pinto et al. · 2021
The blocking performance of a heuristic and a deep reinforcement learning approach for resource provisioning in a dynamic multi-band elastic optical network is evaluated. The heuristic is based on a previous proposal that prioritises the…
View details →Negative / Null Result ReportPsychology
Natalie L. Wilver, Jesse R. Cougle · 2018 · Journal of Consulting and Clinical Psychology
OBJECTIVE: The current study extended upon previous research efforts by evaluating the utility and feasibility of an 8-session Internet-based interpretation bias modification (IBM) training protocol targeting evaluation- and…
View details →Negative / Null Result ReportAgricultural and Biological Sciences
Patrick J. McIntyre, Sharon Y. Strauss · 2017 · Evolution
The geographic distributions of polyploids suggest they can have distinct and sometimes broader niches compared to diploids. However, relatively few field experiments have investigated whether range differences are associated with local…
View details →Negative / Null Result ReportNeuroscience
Tong He, Ru Kong, Avram J. Holmes et al. · 2018
In recent years, deep learning has transformed the field of machine learning. In the field of neuroimaging, there are increasing interests in adopting deep learning techniques. However, deep neural networks (DNNs) usually need large…
View details →Negative / Null Result ReportOpen accessHealth Professions
Cecilia Elam, Per Aagaard, Frode Slinde et al. · 2021 · Journal of Physical Therapy Science
[Purpose] To examine the effects of age and gender in an ageing population with respect to functional decline and the relationship between muscle power and functional capacity. [Participants and Methods] The cohort (N=154) was subdivided…
View details →Negative / Null Result ReportOpen accessImmunology and Microbiology
D. Beaujean, Fedor Gassner, A Wong et al. · 2016 · BMC Public Health
BACKGROUND: Lyme disease or Lyme borreliosis (LB) is the most common tick-borne disease both in the United States and Europe. Children, in particular, are at high risk of contracting LB. Since child-specific educational tools on ticks, tick bites and LB are lacking, we developed an online educational video game. In this study, we compared the effectiveness of an online educational video game versus a newly developed leaflet aimed to improve prevention of tick bites and LB among Dutch schoolchildren. METHODS: A total of 887 children, aged 9-13 years and attending the two final years of primary
View details →Negative / Null Result ReportMedicine
Shahar Shelly, Pritikanta Paul, Hong‐Yan Bi et al. · 2020 · Neurology
OBJECTIVE: To improve myasthenia gravis (MG) autoantibody testing. METHODS: MG serologic tests with confirmatory or refuting clinical-electrodiagnostic (EDX) testing and cancer evaluations were reviewed over 4 years (2012-2015). All…
View details →Negative / Null Result ReportOpen accessMedicine
Wouter M. IJgosse, Harry van Goor, Camiel Rosman et al. · 2020 · JMIR Serious Games
Background Surgical residents underutilize opportunities for traditional laparoscopic simulation training. Serious gaming may increase residents’ motivation to practice laparoscopic skills. However, little is known about the effectiveness of serious gaming for laparoscopic skills training. Objective The aim of this study was to establish construct validity for the laparoscopic serious game Underground. Methods All study participants completed 2 levels of Underground. Performance for 2 novel variables (time and error) was compared between novices (n=65, prior experience <10 laparoscopic proc
View details →Negative / Null Result ReportOpen accessMedicine
Nilgün Mendil, Şahin Temel, Recep Civan Yüksel et al. · 2021 · TURKISH JOURNAL OF MEDICAL SCIENCES
Background/aim: High flow nasal cannula (HFNC) was mostly used in intensive care units (ICUs) with few studies in other departments. We hypothesized that HFNC applied at wards is beneficial for acute respiratory failure in hematological malignancy patients. Materials and methods: The study is a single center, randomized controlled study. Inclusion criteria were hypoxemic respiratory failure and hematological malignancy. Patients were randomized to either venturi mask/nasal cannula oxygen treatment or HFNC. Results: One hundred patients were included in the study. Median age was 58.5 (18–86) ye
View details →Abandoned HypothesisOpen accessMedicine
Richard Parker, Gene Y. Im, Fiona Jones et al. · 2017 · Journal of Gastroenterology
BACKGROUND: Previous studies have described the clinical impact of infection in alcoholic hepatitis (AH) but none have comprehensively explored the aetiopathogenesis of infection in this setting. We examined the causes, consequences and treatment of infection in a cohort of patients with AH. METHODS: We undertook a retrospective cohort study of patients with AH admitted between 2009 and 2014 to seven centres in Europe and the USA. Clinical and microbiological data were extracted from medical records. Survival was analysed with Kaplan-Meier analysis and Cox proportional hazards analysis to cont
View details →Negative / Null Result ReportOpen accessMedicine
Natalie Kashefi, Jonathan I. Nathan, Sharmila Dissanaike · 2014 · Plastic & Reconstructive Surgery Global Open
BACKGROUND: Smoke inhalation is a major source of morbidity and mortality. Heparin and N-acetylcysteine treatment has potential efficacy in inhalation injury. We investigated the impact of a heparin/N-acetylcysteine/albuterol nebulization…
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