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19,803 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 ReportComputer Science

Inferring Statistically Significant Hidden Markov Models

Lu Yu, Jason Schwier, Ryan Craven et al. · 2013 · IEEE Transactions on Knowledge and Data Engineering

Hidden Markov models (HMMs) are used to analyze real-world problems. We consider an approach that constructs minimum entropy HMMs directly from a sequence of observations. If an insufficient amount of observation data is used to generate…

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Negative / Null Result ReportOpen accessPsychology

Issues and advances in research methods on video games and cognitive abilities

Bartosz Sobczyk, Paweł Dobrowolski, Maciek Skorko et al. · 2015 · Frontiers in Psychology

The impact of video game playing on cognitive abilities has been the focus of numerous studies over the last 10 years. Some cross-sectional comparisons indicate the cognitive advantages of video game players (VGPs) over non-players (NVGPs) and the benefits of video game trainings, while others fail to replicate these findings. Though there is an ongoing discussion over methodological practices and their impact on observable effects, some elementary issues, such as the representativeness of recruited VGP groups and lack of genre differentiation have not yet been widely addressed. In this articl

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Negative / Null Result ReportEnvironmental Science

Synthesizing Laboratory and Field Experiments to Quantify Dominant Transformation Mechanisms of 2,4-Dichlorophenoxyacetic Acid (2,4-D) in Aquatic Environments

Amber White, Michelle Nault, Katherine D. McMahon et al. · 2022 · Environmental Science & Technology

Laboratory studies used to assess the environmental fate of organic chemicals such as pesticides fail to replicate environmental conditions, resulting in large errors in predicted transformation rates. We combine laboratory and field data…

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Negative / Null Result ReportOpen accessMedicine

Surgical Methods and Experiences of Surgeons did not Significantly Affect the Recovery in Phonation Following Reconstruction of the Recurrent Laryngeal Nerve

Kana Yoshioka, Akira Miyauchi, Mitsuhiro Fukushima et al. · 2016 · World Journal of Surgery

BACKGROUND: We reported phonatory recovery in the majority of 88 patients after recurrent laryngeal nerve (RLN) reconstruction. Here we analyzed factors that might influence the recovery, in a larger patient series. METHODS: At Kuma Hospital, 449 patients (354 females and 95 males) underwent RLN reconstruction with direct anastomosis, ansa cervicalis-to-RLN anastomosis, free nerve grafting, or vagus-to-RLN anastomosis; 47.4 % had vocal cord paralysis (VCP) preoperatively. Maximum phonation time (MPT) and mean airflow rate during phonation (MFR) were measured 1 year post surgery. Forty patients

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Negative / Null Result ReportOpen accessMedicine

Kawasaki disease and 13-valent pneumococcal conjugate vaccination among young children: A self-controlled risk interval and cohort study with null results

Meghan A. Baker, Bethany Baer, Martin Kulldorff et al. · 2019 · PLoS Medicine

BACKGROUND: Kawasaki disease is an acute vasculitis that primarily affects children younger than 5 years of age. Its etiology is unknown. The United States Vaccine Safety Datalink conducted postlicensure safety surveillance for 13-valent pneumococcal conjugate vaccine (PCV13), comparing the risk of Kawasaki disease within 28 days of PCV13 vaccination with the historical risk after 7-valent PCV (PCV7) vaccination and using chart-validation. A relative risk (RR) of 2.38 (95% CI 0.92-6.38) was found. Concurrently, the Food and Drug Administration (FDA) conducted a postlicensure safety review that

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Negative / Null Result ReportOpen accessPsychology

Opening Pandora’s Loot Box: Weak Links Between Gambling and Loot Box Expenditure in China, and Player Opinions on Probability Disclosures and Pity-Timers

Leon Y. Xiao, Tullia C. Fraser, Philip Newall · 2022 · Journal of Gambling Studies

Loot boxes are quasi-gambling virtual products in video games that provide randomised rewards of varying value. Previous studies in Western contexts have identified a positive correlation between loot box purchasing and problem gambling severity. A preregistered survey of People's Republic of China (PRC) video game players (N = 879) failed to replicate this correlation. We observed statistically significant but weak positive correlations between loot box expenditure and past-year gambling participation, and between loot box expenditure and impulsiveness. This study cannot prove that loot boxes

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Negative / Null Result ReportOpen accessPsychology

Performance similarities predict collective benefits in dyadic and triadic joint visual search

Basil Wahn, Artur Czeszumski, Peter König · 2018 · PLoS ONE

When humans perform tasks together, they may reach a higher performance in comparison to the best member of a group (i.e., a collective benefit). Earlier research showed that interindividual performance similarities predict collective benefits for several joint tasks. Yet, researchers did not test whether this is the case for joint visuospatial tasks. Also, researchers did not investigate whether dyads and triads reach a collective benefit when they are forbidden to exchange any information while performing a visuospatial task. In this study, participants performed a joint visual search task e

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Negative / Null Result ReportOpen accessNeuroscience

Local Information Processing in Adults with High Functioning Autism and Asperger Syndrome: The Usefulness of Neuropsychological Tests and Self-Reports

Annelies Spek, Evert Scholte, Ina A. van Berckelaer‐Onnes · 2010 · Journal of Autism and Developmental Disorders

Local information processing in 42 adults with high functioning autism, 41 adults with Asperger syndrome and 41 neurotypical adults was examined. Contrary to our expectations, the disorder groups did not outperform the neurotypical group…

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Negative / Null Result ReportOpen accessPsychology

Test-retest reliability of a smartphone-based approach-avoidance task: Effects of retest period, stimulus type, and demographics

Hilmar Zech, Philip A. Gable, W. van Dijk et al. · 2022 · Behavior Research Methods

The approach-avoidance task (AAT) is an implicit task that measures people's behavioral tendencies to approach or avoid stimuli in the environment. In recent years, it has been used successfully to help explain a variety of health problems (e.g., addictions and phobias). Unfortunately, more recent AAT studies have failed to replicate earlier promising findings. One explanation for these replication failures could be that the AAT does not reliably measure approach-avoidance tendencies. Here, we first review existing literature on the reliability of various versions of the AAT. Next, we examine

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Negative / Null Result ReportOpen accessMedicine

Preoperative statins are associated with a reduced risk of postoperative delirium following vascular surgery

Dae-Sang Lee, Mi Yeon Lee, Chi-Min Park et al. · 2018 · PLoS ONE

Delirium is a common complication of vascular surgery. The protective effect of preoperative statins on delirium after vascular surgery is controversial. The authors hypothesized that preoperative statin administration would decrease the incidence of delirium after vascular surgery. From May 2010 to May 2015, 1,132 patients underwent vascular surgery. Postoperative delirium was diagnosed from patients' medical records. The incidence of delirium was 11.5%. The preoperative statin exposure was not associated with reduced delirium in the univariate analysis. After adjusting for covariates, preope

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Negative / Null Result ReportOpen accessArts and Humanities

The Impact of Peer Scaffolding through Process Approach on EFL Learners’ Academic Writing Fluency

Masoud Khalili Sabet, Abdorreza Tahriri, Parastou Gholami Pasand · 2013 · Theory and Practice in Language Studies

This paper aimed to examine the impact of peer scaffolding through process approach on writing fluency of EFL learners. To this end, a Nelson Proficiency Test was administered to 49 EFL learners studying at University of Guilan, based on…

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Negative / Null Result ReportOpen accessPsychology

Community-based randomized controlled trial of psychological first aid with crime victims.

Michael R. McCart, Jason E. Chapman, Kristyn Zajac et al. · 2020 · Journal of Consulting and Clinical Psychology

OBJECTIVE: The first randomized controlled trial of psychological first aid (PFA) was conducted, using crime victims as participants. For study Aim 1, investigators tested whether paraprofessional victim advocates could be trained to…

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Negative / Null Result ReportOpen accessMedicine

Positron Emission Tomography Scan for a Hepatic Mass

Boris Blechacz, Gregory J. Gores · 2010 · Hepatology

A 66-year-old male patient who is hepatitis C RNA–positive without cirrhosis has been found to have a mass on ultrasound examination of the liver. The physical examination is unremarkable. The hemoglobin, white cell count, and platelet…

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Negative / Null Result Report

Do compassionate firms outperform? The role of organizational learning

Jacob Guinot, Sandra Miralles, Alma Rodríguez-Sánchez et al. · 2020 · Employee Relations: The International Journal

Purpose Based on a new management paradigm rooted on care and compassion, this study explores the consequences of compassion at work on organizational learning and firm performance. Design/methodology/approach Structural equation modeling…

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Negative / Null Result ReportOpen accessEnvironmental Science

Variability in Fitness Trade-Offs Amongst Coral Juveniles With Mixed Genetic Backgrounds Held in the Wild

Kate M. Quigley, Magena R. Marzonie, Blake D. Ramsby et al. · 2021 · Frontiers in Marine Science

Novel restoration methods are currently under consideration worldwide to help coral reefs recover or become more resilient to higher temperature stress. Critical field-based information concerning the paradigm of “local is best” is lacking for many methods; information which is essential to determine the risk and feasibility associated with restoration. One method involves breeding corals from different reef regions with expected variation in heat tolerance and moving those offspring to new locations to enhance offspring survival; thereby augmenting local stock to enhance survival for anticipa

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Negative / Null Result Report

One chiral fingerprint to find them all

Markus Orsi, Jean-Louis Reymond · 2024 · Journal of Cheminformatics

Abstract Molecular fingerprints are indispensable tools in cheminformatics. However, stereochemistry is generally not considered, which is problematic for large molecules which are almost all chiral. Herein we report MAP4C, a chiral…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Significant difference in active metabolite levels of ginseng in humans consuming Asian or Western diet: The link with enteric microbiota

Jin‐Yi Wan, Chong‐Zhi Wang, Qi‐Hui Zhang et al. · 2016 · Biomedical Chromatography

Abstract After ingestion of ginseng, the bioavailability of its parent compounds is low and enteric microbiota plays an important role in parent compound biotransformation to their metabolites. Diet type can influence the enteric…

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Negative / Null Result ReportOpen accessImmunology and Microbiology

Combination of IL-2, rapamycin, DNA methyltransferase and histone deacetylase inhibitors for the expansion of human regulatory T cells

Makoto Miyara, Driss Chader, Aude Burlion et al. · 2016 · Oncotarget

// Makoto Miyara 1,2 , Driss Chader 1,2 , Aude Burlion 2 , Jérémie Goldstein 2 , Delphine Sterlin 1,2 , Françoise Norol 3 , Hélène Trebeden-Nègre 3 , Laetitia Claër 1,2 , Shimon Sakaguchi 4,* , Gilles Marodon 2,* , Zahir Amoura 1,2,5,6,* and Guy Gorochov 1,2,6 1 Department of immunology, AP-HP Pitié Salpêtrière, Paris, France 2 Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France 3 Cell Therapy, AP-HP Pitié Salpêtri&egrave

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Negative / Null Result ReportOpen accessMedicine

Bronchiectasis: Phenotyping a Complex Disease

James D. Chalmers · 2017 · COPD Journal of Chronic Obstructive Pulmonary Disease

Bronchiectasis is a long-neglected disease currently experiencing a surge in interest. It is a highly complex condition with numerous aetiologies, co-morbidities and a heterogeneous disease presentation and clinical course. The past few…

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Negative / Null Result ReportOpen accessMedicine

No Significant Differences in Clinical and Radiographic Outcomes between PCL Retained or Sacrificed Kinematic Aligned Medial Pivot Total Knee Arthroplasty in Varus Knee

Fortunato Giustra, Francesco Bosco, Giorgio Cacciola et al. · 2022 · Journal of Clinical Medicine

In the last decades, several surgical techniques, such as medial pivot (MP) philosophy and kinematic alignment (KA), have been introduced in total knee arthroplasty (TKA) to improve patients’ outcomes. This retrospective study aims to evaluate the clinical, radiographic, and functional results of PCL preservation or sacrifice in KA MP-TKA. A consecutive series of 147 patients older than 60, with a minimum follow-up of two years, were treated with TKA for severe primary knee osteoarthritis (OA) at the Department of Orthopedics and Traumatology between 1 January 2019, and 1 July 2020. After excl

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Negative / Null Result ReportOpen accessPharmacology, Toxicology and Pharmaceutics

Acute liver failure

Laura Blackmore, William Bernal · 2015 · Clinical Medicine

Acute liver failure (ALF) is a rare critical illness with high mortality whose successful management requires early recognition and effective initial management. Though it may result from a wide variety of causes, in the UK and much of the…

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Negative / Null Result ReportOpen accessNeuroscience

The longevity-associated variant of BPIFB4 improves a CXCR4-mediated striatum–microglia crosstalk preventing disease progression in a mouse model of Huntington’s disease

Alba Di Pardo, Elena Ciaglia, Monica Cattaneo et al. · 2020 · Cell Death and Disease

Abstract The longevity-associated variant (LAV) of the bactericidal/permeability-increasing fold-containing family B member 4 (BPIFB4) has been found significantly enriched in long-living individuals. Neuroinflammation is a key player in Huntington’s disease (HD), a neurodegenerative disorder caused by neural death due to expanded CAG repeats encoding a long polyglutamine tract in the huntingtin protein (Htt). Herein, we showed that striatal-derived cell lines with expanded Htt (STHdh Q 111/111 ) expressed and secreted lower levels of BPIFB4, when compared with Htt expressing cells (STHdh Q 7/

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Negative / Null Result Report

A Decade of Evidence-Based Education

Ronnie Detrich, Teri Lewis · 2012 · Journal of Positive Behavior Interventions

It has been 10 years since No Child Left Behind (NCLB), with its emphasis on scientifically based instruction as a means for improving the educational outcomes of students, was signed into law. In this article, we review the basic tenets…

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Negative / Null Result ReportMedicine

Initiating acute dialysis at earlier Acute Kidney Injury Network stage in critically ill patients without traditional indications does not improve outcome: A prospective cohort study

Cynthia Ciwei Lim, Chieh Suai Tan, Manish Kaushik et al. · 2014 · Nephrology

AIM: Optimal timing for acute renal replacement therapy (ARRT) initiation in critically ill patients with acute kidney injury (AKI) is unclear. We aimed to evaluate outcomes in patients who initiated ARRT for traditional indications versus…

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