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Browse the failure-mode index

19,815 real negative results, null findings, and replication failures · Negative / Null Result Report. 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

Data protection concerns are a statistically significant reason for refusal: Exploratory study of the patient perspective on telemedicine services based on 735 gynecological surgery patients

Sascha Hoffmann, Marina Ott, Franziska Bobbert et al. · 2024 · DIGITAL HEALTH

Objective Internet-based healthcare is a crucial facet of telemedicine. Here, we examine telemedicine methods in perioperative care for gynecological surgery from a patient's perspective. We aim to understand the patients’ needs during…

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Negative / Null Result Report

Hubble diagrams in statistically homogeneous, anisotropic universes

Theodore Anton, Timothy Clifton · 2024 · Journal of Cosmology and Astroparticle Physics

Abstract We consider the form of Hubble diagrams that would be constructed by observers in universes that are homogeneous but anisotropic, when averaged over suitably large length-scales. This is achieved by ray-tracing in different…

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Negative / Null Result Report

STABILIZER

Charlie Curtsinger, Emery D. Berger · 2013 · ACM SIGPLAN Notices

Researchers and software developers require effective performance evaluation. Researchers must evaluate optimizations or measure overhead. Software developers use automatic performance regression tests to discover when changes improve or…

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Negative / Null Result Report

Comparison of AI ‐Generated and Instructor Feedback: No Significant Difference in Perceived Feedback Quality and Neither on Performance

Şeyma Çağlar‐Özhan, Perihan Tekeli, Selay Arkün‐Kocadere · 2025 · Journal of Computer Assisted Learning

ABSTRACT Background Feedback is an essential part of the educational process as it enriches students' learning experiences, provides information about their current performance, shows them what is lacking in achieving goals, and provides…

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Negative / Null Result Report

Evaluation Methods for Statistically Dependent Text

Sarvnaz Karimi, Jie Yin, Jiri Baum · 2015 · Computational Linguistics

In recent years, many studies have been published on data collected from social media, especially microblogs such as Twitter. However, rather few of these studies have considered evaluation methodologies that take into account the…

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Negative / Null Result Report

Where do we expect to find deep plant roots?

G. Annie Mailloux, Mazvita Chikomo, Ying Fan · 2025 · Ecography

Plant roots have been observed up to 70 m in depth – what would compel a plant to root so deeply? Earlier work shows that the climate, soil and drainage all affect rooting depth, but with conflicting results. For example, both the deepest…

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Negative / Null Result Report

No significant difference in intermediate key outcomes in men with low- and intermediate-risk prostate cancer managed by active surveillance

Karolina Cyll, Sven Löffeler, Birgitte Carlsen et al. · 2022 · Scientific Reports

Abstract Active surveillance (AS) is standard of care for patients with low-risk prostate cancer (PCa), but its feasibility in intermediate-risk patients is controversial. We compared outcomes of low- and intermediate-risk patients managed…

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Negative / Null Result Report

Mining Statistically Significant Patterns with High Utility

Huijun Tang, Jiangbo Qian, Yangguang Liu et al. · 2022 · International Journal of Computational Intelligence Systems

Abstract Statistically significant pattern mining (SSPM) is to mine patterns with significance based on hypothesis test. Under the constraint of statistical significance, our study aims to introduce a new preference relation into high…

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Negative / Null Result Report

Funding source and primary outcome changes in clinical trials registered on ClinicalTrials.gov are associated with the reporting of a statistically significant primary outcome: a cross-sectional study

Sreeram V Ramagopalan, Andrew P. Skingsley, Lahiru Handunnetthi et al. · 2015 · F1000Research

Background : We and others have shown a significant proportion of interventional trials registered on ClinicalTrials.gov have their primary outcomes altered after the listed study start and completion dates. The objectives of this study…

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Negative / Null Result Report

Cross‐sectional survey of the replacement of the Japanese term for dementia: Did it reduce discomfort in family members?

Katsuo Yamanaka, Naoya Todo, Mutsumi Yoshizawa et al. · 2020 · Brain and Behavior

Abstract Objectives Decreasing discrimination and stigma of dementia is an international issue. In 2004, the Japanese government changed the previous Japanese stigmatic term of dementia (“Chiho”) to the present one (“Ninchi‐sho”) a meaning…

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Negative / Null Result Report

Statins, metformin, and RAS inhibitors did not reduce variceal bleeding risk and mortality in a large, real-life cohort of patients with cirrhosis

Nikolaus Pfisterer, Michael Schwarz, Caroline Schwarz et al. · 2024 · PLOS ONE

Background Previous experimental and clinical studies suggested a beneficial effect of statins, metformin, angiotensin-converting-enzyme inhibitors and angiotensin II receptor blockers (RASi) on portal hypertension. Still, their effects on…

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Negative / Null Result Report

What if we Find Nothing? Bayesian Analysis of the Statistical Information of Null Results in Future Exoplanet Habitability and Biosignature Surveys

Daniel Angerhausen, Amedeo Balbi, Andjelka B. Kovačević et al. · 2025 · The Astronomical Journal

Abstract Future telescopes will survey temperate, terrestrial exoplanets to estimate the frequency of habitable ( η Hab ) or inhabited ( η Life ) planets. This study aims to determine the minimum number of planets ( N ) required to draw…

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Negative / Null Result Report

Early Hip Fracture Surgery Within 24 hours did not Reduce the Mortality Rate but Resulted in Less Postoperative Opioid use and a Shorter Length of Stay: A Retrospective Study of 276 Patients From a Tertiary Private Hospital in Thailand

Aasis Unnanuntana, Chirathit Anusitviwat, Vasu Lertsiripatarajit et al. · 2024 · Geriatric Orthopaedic Surgery & Rehabilitation

Introduction The comparative results of early hip fracture surgery including mortality and postoperative complications in Thailand were not reported. Therefore, we conducted this study to compare the outcomes between patients who received…

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Negative / Null Result Report

Union-Find Decoders For Homological Product Codes

Nicolas Delfosse, Matthew B. Hastings · 2021 · Quantum

Homological product codes are a class of codes that can have improved distance while retaining relatively low stabilizer weight. We show how to build union-find decoders for these codes, using a union-find decoder for one of the codes in…

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Negative / Null Result Report

Do fundamental portfolios outperform in the MENA equity markets?

Rasha Tawfiq Abadi, Florinda Silva · 2019 · International Journal of Islamic and Middle Eastern Finance and Management

Purpose This study aims to investigate the performance of fundamental weighted portfolios (using sales, cash flows, dividends, book values and a composite of all these variables), an equal weighted portfolio and a smoothed cap-weighted…

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