HSE Scientists Test New Method to Investigate Mechanisms of New Word Acquisition
Researchers at the HSE Centre for Language and Brain were among the first to use transcranial alternating current stimulation to investigate whether it can influence the acquisition of new words. Although the authors of the experiment have not yet found a link between brain stimulation and word acquisition, they believe that adjusting the stimulation parameters may yield different results in the future. The study has been published in Language, Cognition and Neuroscience.
The ability to acquire and appropriately use new words is essential for effective human communication. Throughout life, people continue to learn new words in their native language and also master foreign languages. Acquiring new words is a complex cognitive process, and its underlying mechanisms remain poorly understood.
Modern neuroimaging techniques—such as electroencephalography, magnetic resonance imaging, and magnetoencephalography—allow researchers to look inside the brain and observe which regions are activated during specific cognitive processes. However, it remains impossible to determine whether the relationship between stimulation and brain processes is causal or merely coincidental. The use of alternating current in experiments changes the approach: it allows for modulating rhythms at specific frequencies and tracking their role in neural processes.
Researchers at the HSE Centre for Language and Brain were among the first to investigate whether weak electrical stimulation of the brain at the theta frequency can help memorise new words. The scientists recruited 30 healthy volunteers and asked them to learn 80 pseudowords paired with Russian nouns. During the training, participants received low-current brain stimulation at theta rhythm frequencies (3.5–7.5 Hz) over the left frontotemporal regions of the brain, which are associated with speech and memory. The theta frequency band was deliberately chosen, because previous studies have shown that theta rhythms play a key role in transferring information from short-term to long-term memory.
After participants learned the words with stimulation, the researchers tested their memory retention. There was also a separate phase of learning and testing without stimulation to compare participants’ performance.
No improvement was observed in new word acquisition with stimulation compared to the control condition. The authors note that learning new words activates complex neural networks involving both the cerebral cortex and the hippocampus, which is difficult to stimulate noninvasively from the surface of the head.
Anna Komissarenko
'Although our study did not find a direct effect of alternating current stimulation on word acquisition, we still made an important step toward developing new methods to support language learning. We will continue our research in this direction, but future experiments will focus on other brain regions and types of stimulation,' explains Anna Komissarenko, Junior Research Fellow at the HSE Centre for Language and Brain and lead author of the paper.
In the future, the team plans to test different frequency bands and phases of electrical stimulation, change electrode placement, and expand the experiments to explore various cognitive functions. This can help deepen our understanding of how the brain’s electrical activity influences learning and memory, potentially leading to the development of accelerated language learning techniques, rehabilitation programmes for stroke and injury patients, and optimised neurostimulation methods to enhance memory.
See also:
Biologists Discover Unique Properties of MiR-93-5p MicroRNA in Prostate Cancer
Researchers at the International Laboratory of Microphysiological Systems of the HSE Faculty of Biology and Biotechnology investigated how different isoforms of the same microRNA influence gene function in prostate adenocarcinoma. The study found that in some cases, microRNAs can reinforce each other’s effects by targeting and suppressing the same genes. This finding offers a fresh perspective on the molecular mechanisms underlying tumour development and on the search for disease biomarkers. The results have been published in PeerJ.
HSE Economists Use Search Queries to Forecast Birth Rates
Researchers from the HSE Faculty of Economic Sciences have shown that the accuracy of birth rate forecasts for Russia can be improved by almost 50% by incorporating the dynamics of online search queries related to pregnancy and childbirth into forecasting models. In the best-performing models, the forecasting error fell from 4.6% to 3.2%. The findings have been published in Populations and Economics.
When Looking at Their Own Faces, Men Forget Everything
In an experiment involving 15 healthy men, scientists at HSE University investigated how different phases of the cardiac cycle influence the excitability of the motor cortex when participants viewed either their own photograph or the faces of strangers. The researchers found that when participants looked at their own image, the brain’s response to signals from the heart was weaker, meaning that the influence of cardiac activity on the motor cortex decreased. This finding came contrary to expectations, as self-focused attention was thought to enhance the brain's sensitivity to internal bodily signals. The study has been published in Frontiers in Signal Processing.
HSE Researchers Discover Who Eats Out in Russia—And Why
Around one-third of Russians (31.3%) rarely eat out or buy ready-made meals. The core group of active consumers—those who eat out or purchase prepared food almost every day or several times a week—accounts for only about 9% of the population. These are the findings of a study conducted by the HSE Institute for Social Policy. According to the researchers eating out is no longer a marker of high social status in Russia.
Scientists Model How Interactions Between Societies Can Trigger Chaotic Behaviour
Scientists at HSE MIEM have proposed a mathematical model explaining how interactions between societies can influence their stability. Based on the classical theory of evolutionary games, the study reveals an unexpected effect: even a weak informational influence of one society on another can cause one society to remain stable while the other exhibits chaotic behaviour among its individual members. The study has been published in the International Journal of Bifurcation and Chaos.
Ancient Craniiform Brachiopod: A Newly Discovered Species with a Unique Shell Shape and Lifestyle
Scientists from HSE University, MSU, and Tallinn University of Technology have studied a fossil species of ancient brachiopods that lived in a warm sea in what is now northern Estonia more than 445 million years ago. These ancient brachiopods developed a cup-shaped shell with a protective 'cap' that shielded them from overgrowth by other marine organisms. The study has been published in Palaeogeography, Palaeoclimatology, Palaeoecology.
Scientists Develop Bacterium-Sized Microlaser
An international team of researchers, including scientists from HSE University–St Petersburg, has developed microlasers that emit deep-ultraviolet light at a wavelength of 255 nanometres. The devices operate at room temperature, and the smallest of them measures just two micrometres in diameter—roughly the size of a bacterium. These microlasers could be used in sensors, spectroscopic systems, photonic chips, and communication devices. The paper has been published in Optics & Laser Technology.
HSE Develops App for Assessing Phonological Processing in Children
Researchers at the HSE Centre for Language and Brain have developed a new digital tool for assessing children's phonological processing skills—the ZARYA (Sound Analysis of the Russian Language) test battery. It is the first standardised application in Russia designed to provide a fast and reliable assessment of children's ability to distinguish speech sounds, retain them in working memory, and perform phonemic analysis. The app runs on Android tablets and smartphones and is available for download from RuStore. Details of the test validation have been published in the Journal of Speech, Language, and Hearing Research.
Researchers Discover How Spelling Errors Slow Down Reading in Russian
Psycholinguists from the Centre for Language and Brain at HSE University–St Petersburg have shown that words that are frequently misspelled are processed more slowly by readers, even when presented with the correct spelling. The researchers confirmed this effect for the first time using Russian-language materials and found that response speed is most strongly linked to how confidently individuals can distinguish the correct spelling of a word from an incorrect one. The study has been published in The Mental Lexicon.
Scientists Discover Why Europium 'Misbehaves'
Europium is a rare-earth metal responsible for the pure red glow in displays and other luminescent materials. For a long time, however, it refused to emit light when surrounded by certain organic molecules known as acylpyrazolone ligands. Chemists have now uncovered the reason: in europium complexes with these ligands, a 'black window' appears—a charge-transfer state in which the energy absorbed by the ligand is dissipated as heat rather than emitted as light. Understanding this mechanism opens the way to designing more efficient red-emitting materials for displays, fluorescent thermometers, and chemical sensors. The results have been published in Dalton Transactions.