Negative / Null Result ReportOpen accessNeurosciences. Biological psychiatry. Neuropsychiatry
Tom A. de Graaf, Tom A. de Graaf, Alexander T. Sack et al. · 2018 · Frontiers in Neuroscience
Experiments often challenge the null hypothesis that an intervention, for instance application of non-invasive brain stimulation (NIBS), has no effect on an outcome measure. In conventional statistics, a positive result rejects that hypothesis, but a null result is meaningless. Informally, however, researchers often do find null results meaningful to a greater or lesser extent. We present a model to guide interpretation of null results in NIBS research. Along a “gradient of surprise,” from Replication nulls through Exploration nulls to Hypothesized nulls, null results can be less or more surpr
View details →DOI: 10.3389/fnins.2018.00915 Negative / Null Result ReportOpen accessTechnology (General)
Szostek Karol, Szostek Roman · 2023 · Technical Transactions
The work presents the concept of a device for the measurement of the one-way speed of light. The minimum parameters of this device have also been determined based on the Special Theory of Ether without transverse contraction. The Special Theory of Ether is a relativistic theory of kinemat-ics with a universal frame of reference in which light propagates and is an alternative explanation for the null result of the Michelson-Morley experiment. An experiment based on the proposed device can be one of the ways to falsify the Special Theory of Relativity and Special Theory of Ether.
View details →DOI: 10.37705/techtrans/e2023003 Negative / Null Result Report
Furne Gouveia G · 2026 · Preprint
The Michelson–Morley experiment yielded a null result, indicating equal light travel times in the longitudinal and transverse arms of an interferometer, traditionally interpreted as evidence against a light-propagating medium. This paper…
View details →DOI: 10.20944/preprints202601.0623.v2 Negative / Null Result Report
Furne Gouveia G · 2026 · Preprint
The Michelson–Morley experiment yielded a null result, indicating equal light travel times in the longitudinal and transverse arms of an interferometer, traditionally interpreted as evidence against a light-propagating medium. This paper…
View details →DOI: 10.20944/preprints202601.0623.v1 Negative / Null Result Report
Schwab S, Giuachin K, Held L · 2020 · Preprint
Publication bias is a persisting problem in meta-analyses for evidence based medicine. As a consequence small studies with large treatment effects are more likely to be reported than studies with a null result which causes asymmetry. Here,…
View details →DOI: 10.31222/osf.io/t6cjx Negative / Null Result ReportMedicine
Finkelstein A, Cantor JC, Gubb J et al. · 2024 · Health affairs (Project Hope)
When a randomized evaluation finds null results, it is important to understand why. We investigated two very different explanations for the finding from a randomized evaluation that the Camden Coalition's influential care management…
View details →DOI: 10.1377/hlthaff.2023.01151 Negative / Null Result Report
Dharam Vir Singh · 2024 · International Education and Research Journal
Michelson and Morley conducted an experiment in the year 1887 to measure the speed of earth in luminiferous aether. In this experiment Michelson’s interferometer was used in which two waves are superimposed to generate interference…
View details →DOI: 10.21276/ierj24566444797404 Negative / Null Result Report
Kirill Zhirkov, Robert H. Brehm · 2025 · Research & Politics
Activists and politicians often express a belief that the language used to describe immigrant populations, such as “illegal” vs. “undocumented,” can impact policy opinions. Existing experimental studies, however, have found relatively…
View details →DOI: 10.1177/20531680251355233 Negative / Null Result ReportOpen accessMathematics
Samuel Pawel, Rachel Heyard, Charlotte Micheloud et al. · 2023 · arXiv
In several large-scale replication projects, statistically non-significant results in both the original and the replication study have been interpreted as a "replication success". Here we discuss the logical problems with this approach: Non-significance in both studies does not ensure that the studies provide evidence for the absence of an effect and "replication success" can virtually always be achieved if the sample sizes are small enough. In addition, the relevant error rates are not controlled. We show how methods, such as equivalence testing and Bayes factors, can be used to adequately qu
Negative / Null Result ReportOpen accessPhysics
M. Gillon, B. -O. Demory, C. Lovis et al. · 2017 · arXiv
Short-period super-Earths and Neptunes are now known to be very frequent around solar-type stars. Improving our understanding of these mysterious planets requires the detection of a significant sample of objects suitable for detailed characterization. Searching for the transits of the low-mass planets detected by Doppler surveys is a straightforward way to achieve this goal. Indeed, Doppler surveys target the most nearby main-sequence stars, they regularly detect close-in low-mass planets with significant transit probability, and their radial velocity data constrain strongly the ephemeris of p
Negative / Null Result ReportOpen accessComputer Science
Bibhabasu De · 2025 · arXiv
The Direct Detection~(DD) experiments are vital for probing the particle nature of Dark Matter~(DM). However, in the absence of a scattering event, DD searches result in stringent bounds on the corresponding parameter space. The paper has considered a $U(1)_{L_μ-L_τ}$-extension of the Standard Model~(SM) and augmented the particle spectrum with $SU(2)_L$-singlet vector-like leptons and scalars. A discrete $Z_2$ symmetry stabilizes the lightest SM-singlet vector-like lepton as the viable DM candidate. In the proposed model, amplitude-level cancellation can be achieved for both DM-electron and D
Negative / Null Result ReportOpen accessPhysics
R. J. Nemiroff, W. A. D. T. Wickramasinghe, J. P. Norris et al. · 1994 · arXiv
We have searched for gravitational-lens induced echoes between gamma-ray bursts (GRBs) in NASA's orbiting {\it Compton} Gamma Ray Observatory's Burst and Transient Source Experiment (BATSE) data. The search was conducted in two phases. In the first phase we compared all GRBs in a brightness complete sample of the first 260 GRBs with recorded angular positions having at least 5 \% chance of being coincident from their combined positional error. In the second phase, we compared all GRB light curves of the first 611 GRBs with recorded angular positions having at least 55 \% chance of being coinci
Negative / Null Result ReportOpen accessPhysics
Maurizio Fagotti · 2017 · arXiv
We derive a Moyal dynamical equation that describes exact time evolution in generic (inhomogeneous) noninteracting spin-chain models. Assuming quasistationarity, we develop a hydrodynamic theory. The question at hand is whether some large-time corrections are captured by higher-order hydrodynamics. We consider in particular the dynamics after that two chains, prepared in different conditions, are joined together. In these situations a light cone, separating regions with macroscopically different properties, emerges from the junction. In free fermionic systems some observables close to the ligh
Negative / Null Result ReportOpen accessComputer Science
J. Luo, Y. X. Nie, Y. Z. Zhang et al. · 2001 · arXiv
The differential acceleration between a rotating mechanical gyroscope and a non-rotating one is directly measured by using a double free-fall interferometer, and no apparent differential acceleration has been observed at the relative level of 2x10{-6}. It means that the equivalence principle is still valid for rotating extended bodies, i.e., the spin-gravity interaction between the extended bodies has not been observed at this level. Also, to the limit of our experimental sensitivity, there is no observed asymmetrical effect or anti-gravity of the rotating gyroscopes as reported by hayasaka et
Negative / Null Result ReportOpen accessPhysics
O. Kochukhov, T. Ryabchikova, J. D. Landstreet et al. · 2004 · arXiv
We describe an analysis of the time-resolved measurements of the surface magnetic field in the roAp star gamma Equ. We have obtained a high-resolution and high S/N spectroscopic time-series, and the magnetic field was determined using Zeeman resolved profiles of the Fe II 6149.25 A and Fe I 6173.34 A lines. Contrary to recent reports we do not find any evidence of magnetic variability with pulsation phase, and derive an upper limit of 5-10 G for pulsational modulation of the surface magnetic field in gamma Equ.
Negative / Null Result ReportOpen accessPhysics
S. Hubrig, S. P. Jarvinen, J. D. Alvarado-Gomez et al. · 2023 · arXiv
Numerous delta Sct and gamma Dor pulsators are identified in the region of the Hertzsprung-Russell diagram that is occupied by chemically peculiar magnetic Ap stars. The connection between delta Sct and gamma Dor pulsations and the magnetic field in Ap stars is however not clear: theory suggests for magnetic Ap stars some critical field strengths for pulsation mode suppression by computing the magnetic damping effect for selected p and g modes. To test these theoretical considerations, we obtained PEPSI spectropolarimetric snapshots of the typical Ap star HD340577, for which delta Sct-like pul
Negative / Null Result ReportOpen accessPhysics
E. Paunzen, G. Handler, K. Honkova et al. · 2018 · arXiv
The rapidly oscillating Ap (roAp) stars exhibit pulsational photometric and/or radial velocity variations on time scales of several minutes, which are essential to test current pulsation models as well as our assumptions of atmospheric structure characteristics. In addition, their chemical peculiarity makes them very interesting for probing stellar formation and evolution in the presence of a global magnetic field. To date, a limited number of only 61 roAp stars are known to show photometric variability. On the other hand, a literature survey yields 619 unique stars that have unsuccessfully be
Negative / Null Result ReportOpen accessPhysics
David J. Armstrong, Ares Osborn, Remo Burn et al. · 2025 · arXiv
NCORES was a large observing program on the ESO HARPS spectrograph, dedicated to measuring the masses of Neptune-like and smaller transiting planets discovered by the TESS satellite using the radial velocity technique. This paper presents an overview of the programme, its scientific goals and published results, covering 35 planets in 18 planetary systems. We present spectrally derived stellar characterisation and mass constraints for five additional TOIs where radial velocity observations found only marginally significant signals (TOI-510.01, $M_p=1.08^{+0.58}_{-0.55}M_\oplus$), or found no si
Negative / Null Result ReportMedicine
Kikut-Stein A, Jesch E, Dhawan D et al. · 2026 · Journal of health communication
In the wake of the COVID-19 pandemic, a critical question for health communication is whether misinformation exposure and misperceptions about one health topic have far-reaching, or "spillover," effects on health behavior in general. The…
View details →DOI: 10.1080/10810730.2026.2623409 Negative / Null Result Report
Nees MA, Geiss H · 2025 · Preprint
An experiment used a nudge intervention modeled after the question-behavior effect (QBE) in an attempt to reduce speed propensity in a video simulated driving task. Participants viewed a vignette simulating a vehicle start-up sequence. The…
View details →DOI: 10.31234/osf.io/abngt_v2 Negative / Null Result Report
Nees MA, Geiss H · 2025 · Preprint
An experiment used a nudge intervention modeled after the question-behavior effect (QBE) in an attempt to reduce speed propensity in a video simulated driving task. Participants viewed a vignette simulating a vehicle start-up sequence. The…
View details →DOI: 10.31234/osf.io/abngt_v1 Negative / Null Result Report
Hajra S · 2024 · Preprint
In this article, we have rationally analyzed the null result of the Michelson-Morley experiment, along with the unique observation that all electrodynamic phenomena, whether terrestrial, solar, or astral, are independent of the motion of…
View details →DOI: 10.32388/rfu29h 