Articles tagged with Hypothesis Testing
Comprehensive exploration of living organisms, biological systems, and life processes across all scales from molecules to ecosystems. Encompasses cutting-edge research in biology, genetics, molecular biology, ecology, biochemistry, microbiology, botany, zoology, evolutionary biology, genomics, and biotechnology. Investigates cellular mechanisms, organism development, genetic inheritance, biodiversity conservation, metabolic processes, protein synthesis, DNA sequencing, CRISPR gene editing, stem cell research, and the fundamental principles governing all forms of life on Earth.
Comprehensive medical research, clinical studies, and healthcare sciences focused on disease prevention, diagnosis, and treatment. Encompasses clinical medicine, public health, pharmacology, epidemiology, medical specialties, disease mechanisms, therapeutic interventions, healthcare innovation, precision medicine, telemedicine, medical devices, drug development, clinical trials, patient care, mental health, nutrition science, health policy, and the application of medical science to improve human health, wellbeing, and quality of life across diverse populations.
Comprehensive investigation of human society, behavior, relationships, and social structures through systematic research and analysis. Encompasses psychology, sociology, anthropology, economics, political science, linguistics, education, demography, communications, and social research methodologies. Examines human cognition, social interactions, cultural phenomena, economic systems, political institutions, language and communication, educational processes, population dynamics, and the complex social, cultural, economic, and political forces shaping human societies, communities, and civilizations throughout history and across the contemporary world.
Fundamental study of the non-living natural world, matter, energy, and physical phenomena governing the universe. Encompasses physics, chemistry, earth sciences, atmospheric sciences, oceanography, materials science, and the investigation of physical laws, chemical reactions, geological processes, climate systems, and planetary dynamics. Explores everything from subatomic particles and quantum mechanics to planetary systems and cosmic phenomena, including energy transformations, molecular interactions, elemental properties, weather patterns, tectonic activity, and the fundamental forces and principles underlying the physical nature of reality.
Practical application of scientific knowledge and engineering principles to solve real-world problems and develop innovative technologies. Encompasses all engineering disciplines, technology development, computer science, artificial intelligence, environmental sciences, agriculture, materials applications, energy systems, and industrial innovation. Bridges theoretical research with tangible solutions for infrastructure, manufacturing, computing, communications, transportation, construction, sustainable development, and emerging technologies that advance human capabilities, improve quality of life, and address societal challenges through scientific innovation and technological progress.
Study of the practice, culture, infrastructure, and social dimensions of science itself. Addresses how science is conducted, organized, communicated, and integrated into society. Encompasses research funding mechanisms, scientific publishing systems, peer review processes, academic ethics, science policy, research institutions, scientific collaboration networks, science education, career development, research programs, scientific methods, science communication, and the sociology of scientific discovery. Examines the human, institutional, and cultural aspects of scientific enterprise, knowledge production, and the translation of research into societal benefit.
Comprehensive study of the universe beyond Earth, encompassing celestial objects, cosmic phenomena, and space exploration. Includes astronomy, astrophysics, planetary science, cosmology, space physics, astrobiology, and space technology. Investigates stars, galaxies, planets, moons, asteroids, comets, black holes, nebulae, exoplanets, dark matter, dark energy, cosmic microwave background, stellar evolution, planetary formation, space weather, solar system dynamics, the search for extraterrestrial life, and humanity's efforts to explore, understand, and unlock the mysteries of the cosmos through observation, theory, and space missions.
Comprehensive examination of tools, techniques, methodologies, and approaches used across scientific disciplines to conduct research, collect data, and analyze results. Encompasses experimental procedures, analytical methods, measurement techniques, instrumentation, imaging technologies, spectroscopic methods, laboratory protocols, observational studies, statistical analysis, computational methods, data visualization, quality control, and methodological innovations. Addresses the practical techniques and theoretical frameworks enabling scientists to investigate phenomena, test hypotheses, gather evidence, ensure reproducibility, and generate reliable knowledge through systematic, rigorous investigation across all areas of scientific inquiry.
Study of abstract structures, patterns, quantities, relationships, and logical reasoning through pure and applied mathematical disciplines. Encompasses algebra, calculus, geometry, topology, number theory, analysis, discrete mathematics, mathematical logic, set theory, probability, statistics, and computational mathematics. Investigates mathematical structures, theorems, proofs, algorithms, functions, equations, and the rigorous logical frameworks underlying quantitative reasoning. Provides the foundational language and tools for all scientific fields, enabling precise description of natural phenomena, modeling of complex systems, and the development of technologies across physics, engineering, computer science, economics, and all quantitative sciences.
Physicists at NIST have confirmed that particles of matter can exhibit 'spooky action' through quantum entanglement. The experiment closed two loopholes in conventional Bell tests, demonstrating the high quality of entangled states.
A recent study found that personal adversity, such as illness or relationship stress, can lead to increased polarization in political attitudes. The research team analyzed data from over 1,600 Americans and discovered a strong correlation between repeated experiences of adversity and extreme conservative attitudes.
A new multilab replication project partially replicated a 2012 study on cooperation under time pressure. When noncompliant participants were included in the analysis, time pressure had little or no effect on cooperation. The findings raise concerns about the best approach to measuring this relationship.
A new equation developed by a Nebraska researcher can correctly identify athletes who attempt to sandbag on the ImPACT test, informing better decisions about return-to-play protocols. The approach was found to be more effective than existing methods in detecting poor effort, with high accuracy rates.
A study published in the journal Emotion found that husbands and wives who practiced compassionate acts reported higher emotional well-being, with benefits significantly stronger for the donors than recipients. The researchers discovered that recognition by the recipient is not necessary for the donor's benefit.
A study by University of Vermont researchers found that banks enjoy a significant edge over investors due to their superior access to local private information. Banks can quickly adapt to new information and withdraw capital or invest more heavily in targeted areas, giving them a major advantage. In contrast, direct investors face limi...
Researchers developed a new metric to predict blood clots in the left ventricle, which is more accurate than current methods. The E-wave propagation index can be calculated using standard diagnostic tools and clinical procedures, and has been validated with data from patients who experienced post-heart attack blood clots.
Researchers found that people who recently moved were more likely to make changes to their behaviors, such as reducing energy and water use, commuting choices, and waste management. This study suggests that changing one aspect of life, like moving, can lead to broader positive changes.
A new study reveals that experiencing cultural distinctiveness can broaden an individual's definition of 'home' to include related cultural groups. This expansion allows consumers to fulfill the need to connect with their home culture by favoring brands associated with a related group.
A recent study published in PLOS ONE found a significant association between increased smartphone screen-time and lower sleep quality. Over 650 adult participants recorded their daily screen-time using a smartphone application, revealing that longer screen-time periods were linked to poorer sleep quality and less sleep overall.
Researchers identify direct link between brain inflammation and CTE, with longer football careers predicting increased inflammation and disease progression. The study suggests that treating inflammation could prevent or lessen CTE development, offering potential biomarkers for early identification.
A coordinated replication effort across 17 labs failed to replicate the 1988 study suggesting that facial expressions can trigger emotional reactions. The multilab study used a standardized protocol with over 1,900 participants but found no evidence that inducing particular facial expressions affected their emotional state.
Research at the International Early Psychosis Association meeting found a significant association between low vitamin D levels and increased negative and depressive symptoms in patients with psychotic disorders. Vitamin D deficiency was also linked to cognitive impairments, including decreased processing speed and verbal fluency.
A study published in PLOS ONE found that shelter dogs spending more time resting during the day displayed better behavioral signs of well-being and performed better on a food reward test. The researchers suggest setting aside quiet time for dogs to rest may be beneficial for their welfare.
A new study suggests that drinking cold water can reduce feelings of shame and regret by regulating emotions and temperature. Researchers found that people in warm environments tend to feel more regret after making mistakes, but consuming cold drinks or being exposed to cold temperatures can help alleviate these emotions.
A team of researchers found that crowdsourcing can be used to quickly evaluate test questions, identifying high-quality ones that are also effective for students. This approach can help schools, professors, and textbook publishers develop better tests without the need for expensive pilot testing.
Researchers identified urolithin A, a molecule that can re-establish the cell's ability to recycle defective mitochondria. Initial results from animal studies showed significant increases in lifespan and endurance. Human clinical trials are underway to test the molecule's effectiveness.
A team of researchers used a custom-built robot, mathematical models, and studies of amphibious fish to explore the critical evolutionary leap from water to land. They found that stabilizing the body with a tail provided substantial benefits for early terrestrial vertebrates.
Researchers found that genetic variants of the S1P1 receptor influence fingolimod's effectiveness in treating multiple sclerosis. The study used mouse models to demonstrate that an S1PR1 variant affecting phosphorylation ability led to reduced fingolimod efficacy, and treatment with a CCR6-blocking antibody delayed disease progression.
Researchers at Columbia University have found that individual stocks may be overpriced for longer periods of time and more often than previously thought. The study estimated the number of bubbles in the US stock market between 2000 and 2013, counting up to 13,000 bubbles, or an average of four bubbles per stock.
A new timed amyloid seeding assay achieves or surpasses the sensitivity of currently available tests for transmissible spongiform encephalopathies, according to a report in The Journal of Molecular Diagnostics. This advanced assay offers better detection capabilities, allowing for clinical applications and surveillance programs.
A study published in Psychological Science found that humans are often driven by a desire to resolve uncertainty, even if it leads to harm. The researchers used experiments to demonstrate that individuals will click on pens with uncertain outcomes more frequently than those with clear consequences.
A study by Drexel University researchers found that sudden insights are more likely to be correct than answers derived from analytical thinking. The experiments used timed puzzles and showed that responses given during insight were often correct, while those from analytical thinking were less accurate.
A team of researchers from the Universitat Autonoma de Barcelona tested the mathematical law known as Zipf's Law on a large database of English-language texts in the Project Gutenberg. The study found that 55% of the texts fit perfectly into Zipf's Law, while 40% do when including rare words.
Researchers suggest using CRISPR-Cas9 technology to introduce a male sex determining gene into female mosquito embryos, potentially reducing disease transmission. The goal is to create sterile or fertile males that outcompete females in the wild.
The Preregistration Challenge tests how addressing incentives can improve the reproducibility of published research by offering $1,000 rewards for published results. Over 60% of researchers are choosing to submit public preregistrations, and the first results are expected in late 2016.
Research by Marketing Professors Derick F. Davis, Rajesh Bagchi, and Lauren G. Block found that alliterative promotional messages facilitate quicker processing, leading to increased sales and preference among consumers. The study also demonstrated that altering message components can boost sales without lowering prices.
A recent research project by Bryan L. Stuart and colleagues found three distinct evolutionary lineages of Asian common toads, each with narrower geographical ranges and ecological niches, in mainland Southeast Asia, coastal Myanmar, and the Sundaic islands.
Researchers at University of Bath found that life transitions like moving house can provide a window of opportunity to instill better environmental behaviors, such as recycling and energy use. The study suggests that targeted interventions during these times are more effective than blanket campaigns.
A study published in Frontiers in Psychology found that varying pause times before the starting gun can result in significant differences in finishing times among athletes. The researchers propose introducing a warning step to ensure all athletes are ready before the start, and even suggest computerized procedures to minimize human error.
The Chinese continental shelf's basement is of exotic origin, unrelated to eastern China's continental lithosphere. Subduction cessation at ~100 Ma jammed the trench, altering Pacific plate motion and forming a transform boundary.
A study by Hanna Marno and colleagues found that languages with SVO structures prefer simplicity due to cognitive load constraints. In experiments where participants were not required to invent their own gestures, a preference for the SVO form emerged in both Italian-speaking and Farsi-speaking groups.
Researchers developed a 'reusable holdout' tool to identify meaningful correlations in adaptive data analysis. The algorithm, tested on two rigged datasets, correctly identified true statistical significance and eliminated false discoveries.
An international research team found that human-mediated dispersal of alien gastropods has led to a global reorganization of biogeographic patterns, with communities becoming increasingly similar across continents. Climate now plays a major role in shaping species distribution, rather than geographical distance.
Researchers have developed a method to create custom nanoscale structures that mimic nature's designs using robotic chemical-synthesizing machines. The peptoids, synthetic versions of peptides, show promise as durable antimicrobials that can target bacteria without harming red blood cells.
Researchers found that shoppers who ate an apple sample bought 28% more fruits and vegetables than those who didn't. The study suggests that small healthy snacks can prime shoppers to make healthier food choices.
Researchers found that men donate four times more to an attractive female fundraiser in response to another male's contribution, suggesting a subconscious competitive helping behavior. To improve fundraising success, seed campaigns with larger donations early and make fundraisers smile.
A new study by University of Missouri biologist James E. Carrel found that southern house spiders prefer holes and cavities that are three to four times as big as their own body size for building nests. The spiders select nest sites based on their size, similar to how hermit crabs trade up for bigger shells as they grow bigger.
Research suggests that people are willing to take risks because they believe God will protect them from negative outcomes. The study found that participants who were reminded of God were more likely to engage in nonmoral risky behaviors, such as skydiving, and perceived less danger in these activities.
Researchers used iPlant, Stampede and Lonestar supercomputers to identify genes sensitive to cold and drought in the flowering mustard weed Arabidopsis thaliana. This helps understand plant adaptation to climate change and can be applied to improve crops.
Researchers propose that the Milky Way galaxy may contain a space-time tunnel, also known as a wormhole, which could be navigable. The study combined dark matter maps with general relativity equations to suggest this possibility.
Researchers propose the 'Canine Cooperation Hypothesis', suggesting wolves' natural social behavior provided the foundation for human-dog relationships. Studies show wolves exhibit similar social skills to dogs, including tolerance and cooperation with humans.
Researchers found that males who consistently bully females tend to father more babies with their victims. Long-term aggression, particularly by high-ranking males, increased paternity success.
A new study found that ALS patients have difficulty with verb processing compared to noun processing. The research suggests that motor deficits and language impairment are two separate aspects of the disease.
Researchers advocate for massive online laboratories to prevent errors and fraud in life sciences research. These online labs use videogames to engage non-professional investigators and promote transparency, reducing the risk of scientific fraud and cherry-picking.
A new DNA isolation technique using MagnaCel paramagnetic cellulose particles has been shown to improve the quality and quantity of DNA extractions across a wide range of flowering plants. This method outperformed traditional techniques like CTAB and DNeasy, providing an average of twice the DNA yield and more consistent DNA purity.
The VALUE study reveals that only 13% of vascular testing facilities are IAC accredited, with significant regional variations in utilization. The study also highlights the importance of IAC accreditation in setting practice standards and ensuring quality performance.
A study found that daily sunshine hours before a suicide event were associated with reduced rates of suicide among women, while men showed an opposite correlation. The researchers also noted that long-term exposure to sunshine was linked to lower suicide rates in Austria between 1970 and 2010.
Researchers found that red-legged salamanders on trees had the same diet as those on the ground, contradicting the theory that climbing allows access to new food sources. The study suggests alternative explanations for salamander behavior, including competition and predator avoidance.
Researchers uncover the evolutionary roots of animals' ability to quickly absorb critical life lessons, a phenomenon known as the Garcia Effect. The study found that statistical reliability across generations determines what animals can learn and what they can't, with different environments favoring specific associations.
Researchers at MIT developed a robot that augments the grasping motion of the human hand, working in sync with the wearer's fingers to grasp objects of various shapes and sizes. The device aims to assist people with limited dexterity in performing routine household tasks.
A new hypothesis proposes that breeding for tameness causes changes in diverse traits, including floppier ears, patches of white fur, and more juvenile faces, due to impaired development or migration of neural crest cells. This unified explanation ties together several components of the domestication syndrome.
A new model analyzing bird responses to climate change suggests that precipitation, not temperature, is the key factor influencing population trends. The study found that changes in precipitation can affect plant growth, soil moisture, and insect abundance, leading to declines in certain species.
Scientists have discovered that bacteria can develop a biological timer to survive under antibiotic exposure, adapting their dormant period to match the treatment duration. This breakthrough has significant implications for slowing the evolution of antibiotic resistance.
Research at Euroanaesthesia meeting found that children exposed to indoor coal-burning stoves and/or second-hand tobacco smoke experience higher postoperative complications and excessive pain after tonsillectomies. Elevated carboxyhaemoglobin concentrations were linked to increased pain sensitivity and more frequent use of painkillers.
Researchers tested whether ancestral human diets, or paleo diets, result in better appetite suppression. They found that high-fiber plant-based diets likely do not lead to increased SCFAs and appetite suppression, but rather may help baboons maintain grazing all day to consume enough nutrients.
A study by Deanna Soper and colleagues found that exposure to parasites increases mating behavior and promiscuity in New Zealand freshwater snails. This supports the Red Queen hypothesis, which suggests that sexual reproduction helps organisms adapt to a changing environment by increasing genetic diversity.
Scientists confirm the mafia hypothesis, which suggests that birds cooperate with parasitic birds to avoid retaliation, increasing survival rates of parasites. Host birds must learn and adapt to reject foreign eggs, while parasites use their behavior to extort hosts.
Researchers used a highly accurate simulation model to test a hypothesis about the behavior of hydrogen under extreme conditions. The study found that metallization can only occur at pressures approaching 500 gigapascals, a value that is currently beyond experimental capabilities.
A recent Harvard University study using prosopagnosia patients found that face recognition is a distinct cognitive process. Patients with face blindness showed poor performance in recognizing faces, contrasting with their ability to recognize other objects of expertise.