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Browse the failure-mode index

21,245 real negative results, null findings, and replication failures. Search the index →

WASTE indexes published research — it does not host or republish full papers. Each entry is a metadata record compiled from open scholarly databases; the abstract is shown in full only where the paper is openly licensed, otherwise a short excerpt under fair use. Classifications are automated and approximate.

Negative / Null Result Report

Human-derived Treg and MSC combination therapy may augment immunosuppressive potency in vitro, but did not improve blood brain barrier integrity in an experimental rat traumatic brain injury model

Henry W. Caplan, Karthik S. Prabhakara, Naama E. Toledano Furman et al. · 2021 · PLOS ONE

Traumatic brain injury (TBI) causes both physical disruption of the blood brain barrier (BBB) and altered immune responses that can lead to significant secondary brain injury and chronic inflammation within the central nervous system…

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Negative / Null Result Report

Did a quality improvement intervention improve quality of maternal health care? Implementation evaluation from a cluster-randomized controlled study

Elysia Larson, Godfrey M Mbaruku, Jessica Cohen et al. · 2019 · International Journal for Quality in Health Care

Abstract Objective To test the success of a maternal healthcare quality improvement intervention in actually improving quality. Design Cluster-randomized controlled study with implementation evaluation; we randomized 12 primary care…

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Negative / Null Result Report

Routine Diagnostics Confirm Novel Neurodevelopmental Disorders

Robin-Tobias Jauss, Sophia Schließke, Rami Abou Jamra · 2022 · Genes

Routine diagnostics is biased towards genes and variants with satisfactory evidence, but rare disorders with only little confirmation of their pathogenicity might be missed. Many of these genes can, however, be considered relevant,…

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Negative / Null Result Report

Prognostically Significant Myocardial Injury in Patients Undergoing Transcatheter Aortic Valve Replacement

Vikram Sharma, Tanujit Dey, Kesavan Sankaramangalam et al. · 2019 · Journal of the American Heart Association

Background Troponin elevation occurs commonly in the setting of transcatheter aortic valve replacement (TAVR). There is a lack of information on the extent of troponin elevation post TAVR that is prognostically significant. We assessed the…

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Negative / Null Result Report

When do neural networks outperform kernel methods?*

Behrooz Ghorbani, Song Mei, Theodor Misiakiewicz et al. · 2021 · Journal of Statistical Mechanics: Theory and Experiment

Abstract For a certain scaling of the initialization of stochastic gradient descent (SGD), wide neural networks (NN) have been shown to be well approximated by reproducing kernel Hilbert space (RKHS) methods. Recent empirical work showed…

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Negative / Null Result Report

Pro-inflammatory response ensured by LPS and Pam3CSK4 in RAW 264.7 cells did not improve a fungistatic effect on Cryptococcus gattii infection

Gabriela Yamazaki de Campos, Raquel Amorim Oliveira, Patrícia Kellen Martins Oliveira-Brito et al. · 2020 · PeerJ

Background The macrophage lineage is characterized by plasticity due to the acquisition of distinct functional phenotypes, and two major subsets are evaluated; classical M1 activation (strong microbicidal activity) and alternative M2…

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Negative / Null Result Report

A Prospective Study of the Association Between Clinically Significant Bleeding in PICU Patients and Thrombocytopenia or Prolonged Coagulation Times*

Paul C. Moorehead, Nicholas J. Barrowman, Janelle Cyr et al. · 2017 · Pediatric Critical Care Medicine

Objective: There are no proven methods to predict the risk of clinically significant bleeding in the PICU. A retrospective study identified platelet count as a risk marker for clinically significant bleeding. We conducted a study to…

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Negative / Null Result Report

Significant effects on neonatal morbidity and mortality after regional change in management of post‐term pregnancy

CHARLOTTA GRUNEWALD, STELLAN HÅKANSSON, SISSEL SALTVEDT et al. · 2010 · Acta Obstetricia et Gynecologica Scandinavica

Abstract Objective. To evaluate the effects on neonatal morbidity of a regional change in induction policy for post‐term pregnancy from 43 +0 to 42 +0 gestational weeks (GWs). Design and setting. Nationwide retrospective register study…

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Negative / Null Result ReportNeuroscience

How does Stroop interference change with practice? A reappraisal from the musical Stroop paradigm.

Laurent Grégoire, Pierre Perruchet, Bénédicte Poulin-Charronnat · 2014 · Journal of Experimental Psychology Learning Memory and Cognition

Most earlier studies investigating the evolution of the Stroop effect with the amount of reading practice have reported data consistent with an inverted U-shaped curve, whereby the Stroop effect appears early during reading acquisition,…

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Negative / Null Result ReportOpen accessMedicine

Polyprotein Processing as a Determinant for in Vitro Activity of Semliki Forest Virus Replicase

Maija K. Pietilä, Irina C. Albulescu, Martijn J. van Hemert et al. · 2017 · Viruses

Semliki Forest virus (SFV) is an arthropod-borne alphavirus that induces membrane invaginations (spherules) in host cells. These harbor the viral replication complexes (RC) that synthesize viral RNA. Alphaviruses have four replicase or nonstructural proteins (nsPs), nsP1-4, expressed as polyprotein P1234. An early RC, which synthesizes minus-strand RNA, is formed by the polyprotein P123 and the polymerase nsP4. Further proteolytic cleavage results in a late RC consisting of nsP1-4 and synthesizing plus strands. Here, we show that only the late RCs are highly active in RNA synthesis in vitro. F

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Negative / Null Result ReportOpen accessMedicine

A Genome-Wide Investigation of Copy Number Variation in Patients with Sporadic Brain Arteriovenous Malformation

Nasrine Bendjilali, Helen Kim, Shantel Weinsheimer et al. · 2013 · PLoS ONE

BACKGROUND: Brain arteriovenous malformations (BAVM) are clusters of abnormal blood vessels, with shunting of blood from the arterial to venous circulation and a high risk of rupture and intracranial hemorrhage. Most BAVMs are sporadic, but also occur in patients with Hereditary Hemorrhagic Telangiectasia, a Mendelian disorder caused by mutations in genes in the transforming growth factor beta (TGFβ) signaling pathway. METHODS: To investigate whether copy number variations (CNVs) contribute to risk of sporadic BAVM, we performed a genome-wide association study in 371 sporadic BAVM cases and 56

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Negative / Null Result ReportOpen accessNeuroscience

Comparing fear and anxiety chemosignals: Do they modulate facial muscle activity and facilitate identifying facial expressions?

Nuno Gomes, Bettina M. Pause, Monique A. M. Smeets et al. · 2023 · Chemical Senses

Fear and anxiety are the most frequently studied emotional states in chemosignal research. Despite differences between these two emotional states, findings from research using fear and anxiety body odors (BOs) are often treated as part of…

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Negative / Null Result ReportOpen accessMedicine

A cross-sectional study to assess response generated by ChatGPT and ChatSonic to patient queries about Epilepsy

Aditya Kumar Gudimella Tirumala, Shubham Mishra, Nritya Trivedi et al. · 2023 · Telematics and Informatics Reports

This article presents a study comparing the responses of two AI chatbots, ChatGPT and ChatSonic, regarding inquiries about epilepsy. Overall, ChatGPT and ChatSonic are very similar in terms of their capabilities and limitations and they…

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Negative / Null Result ReportOpen accessEconomics, Econometrics and Finance

True versus Spurious Long Memory in Cryptocurrencies

Dooruj Rambaccussing, Murat Mazibaş · 2020 · Journal of risk and financial management

We test whether the selected cryptocurrencies exhibit long memory behavior in returns and volatility. We use data on five most traded cryptocurrencies: Bitcoin, Litecoin, Ethereum, Bitcoin Cash, and XRP. Using recent tests of long memory developed against persistent and nonlinear alternatives, this paper finds that long memory is mostly rejected in returns. The tests fail to reject the null hypothesis of long memory in most cases across different volatility proxies and cryptocurrencies. The estimated memory parameters show that volatility is persistent, and when volatility is measured by log r

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Negative / Null Result ReportOpen accessMedicine

Rodent Models of Alzheimer’s Disease: Past Misconceptions and Future Prospects

Helen M Collins, Susan A. Greenfield · 2024 · International Journal of Molecular Sciences

Alzheimer's disease (AD) is a progressive neurodegenerative disease with no effective treatments, not least due to the lack of authentic animal models. Typically, rodent models recapitulate the effects but not causes of AD, such as cholinergic neuron loss: lesioning of cholinergic neurons mimics the cognitive decline reminiscent of AD but not its neuropathology. Alternative models rely on the overexpression of genes associated with familial AD, such as amyloid precursor protein, or have genetically amplified expression of mutant tau. Yet transgenic rodent models poorly replicate the neuropatho

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