Which intervention technique is more effective in reducing public speaking anxiety in children aged 9 – 12 years, exposure or restructuring cognitions?

Why do black holes emit thermal radiation? And how does a closed quantum system thermalize?

Songbirds as vocal learners learn their songs and song preference from social tutors⁠. Tutor choice for both song and preference learning are important to characterize for understanding individual learning performance and cultural transmission of song⁠.

For each living organism health is ensured by correct functioning of its cells. Cells therefore have elaborate methods for regulation of their proteins.

This research explores how international organisations responded to the humanitarian and human rights challenges brought about by COVID-19.

Three types of PLCs are studied, varying on the dimension of autonomy of and interdependency between teachers: Joint work, Aid and assistance and Shared practices.

Can SMILE, our multi-component intervention, which combines cognitive-behavioural therapy for insomnia, mindfulness, stress, and lifestyle components, improve sleep quality? Can it also improve mood and quality of life and prevent depression and anxiety in the long term?

How do parliamentarians secure their political future? Are their activities in the legislature connected to their place on the candidate list from one election to the next? Political scientists Tom Louwerse and Cynthia van Vonno examine the Dutch case. Their main finding is that speaking in the plenary…

Political scientists Joop van Holsteyn and Tom Louwerse (Leiden University) find that the Dutch government is having a hard time coping with referendum outcomes in general, and ‘anti-European’ sentiments among voters in particular.

This book systematically evaluates the empirical evidence for legitimacy decline in established democracies, the explanatory power of theories of legitimacy decline, and promises new routes in investigating and assessing political legitimacy.

This book concentrates on the regulation of political parties in the EU post-communist democracies, and on Bulgaria, Croatia, the Czech Republic, Estonia, Hungary, Latvia, Lithuania, Poland, Slovakia, Slovenia and Romania, in particular.

Water droplets float in a hot pan because of the so-called Leidenfrost effect. Now physicists have discovered a variation: the Elastic Leidenfrost effect. It explains why hydrogel balls jump around on a hot plate making high pitched sounds. Publication in Nature Physics on July 24.

In a virtual game environment, one of the positive effects of anonymity is the absence of one's prejudice toward others, which can give a person the freedom to change and experiment (Bartle, 2003). This project will adopt anonymity to be added to online cross-cultural collaborative learning in higher…

This dissertation contains the further development of a method for linguistic-stylistic research, which provides a systematic means to interpret global impressions of a text through choices in formulation at word- and sentence level.

In Reframing the Diplomat Albertine Bloemendal offers a unique window onto the unofficial dimension of Cold War transatlantic relations by analyzing the diplomatic role of the Dutch Atlanticist Ernst van der Beugel as a government official and as a private diplomat.

STM scanning experiments on poorly conducting materials are challenging, and can cause a distortion effect. A new model corrects for this effect, allowing physicists to better study materials in their quest to understand unconventional superconductivity. Publication in Physical Review B as Editor’s…

n this PhD thesis, the recombination of different atomic lattices in stacked 2D materials such as twisted bilayer graphene is studied. Using the different possibilities of Low-Energy Electron Microscopy (LEEM), the domain forming between the two atomic layers with small differences is studied.

This week, Prof. Luuk van Middelaar (Europa Institute) publishes Alarums & Excursions: improvising Politics on the Europen Stage – a revised update of his 2017 book on the decade of EU crises.

Even if you have a healthy lifestyle, there's a lot to experience and learn during the Healthy University Week, from 26 to 30 October. Health psychologist Andrea Evers is enthusiastic about the week ahead. She tells us about the programme and gives us a taste of her own talk on what the placebo effect…

Plastic pollution is a major environmental issue. Although regulation is being adopted, plastic pollution is still increasing. Effective and strict enforcement is key and NGOs and civilians can be instrumental in this.

In meta-analysis, heterogeneity often exists between studies. In such cases, it is essential to investigate the sources of heterogeneity and understand the relationship between effect size and study characteristics (i.e., moderators).

This year, Leiden University celebrates its 444th birthday – and when you’re giving a party, you need great music! Neuropsychologist Rebecca Schaefer agrees. She has been fascinated by music since she was a child, and now she studies how music can make us happy, give us energy or calm us down.

Vera van Noort, professor in Computational Systems Biology at the KU Leuven (Belgium), is appointed holder of the rotating chair “Van der Klaauw Professor” for the year 2015-2016 at the Institute of Biology. Holders of the chair bring inspiring research and teaching in theoretical biology to the University.…

On 19 February 2019, Mirjam Sombroek-van Doorm defended her thesis 'Medisch beroepsgeheim en de zorgplicht van de arts bij kindermishandeling in de rechtsverhouding tussen arts, kind en ouders'. The doctoral research was supervised by Prof. dr. A.G. Castermans en Prof. mr. C.J.J.M. Stolker.

Medicines can work even if they have no active ingredient. The first international scientific conference on placebos will take place in Leiden from 2 to 4 April. Placebo researcher Andrea Evers, who is also chairing the conference, answers some pressing questions.

PhD candidate Dennis Wander searches for the best of both worlds. That is to say: a cancer drug that is effective and also has minimal side effects. To this end, he makes new molecules inspired by two existing medicines. And not without result: ‘We have created a new variant that is very promising.’…

This thesis has shed light on some of the ways in which the local electrolyte composition can differ from the bulk and how these changes in the local reaction environment can determine the activity and/or selectivity of two important electrocatalytic reactions, namely, electrochemical CO2 reduction…

On 1 October 2020, Arianne de Leeuw defended her thesis 'Scheiding van zeggenschap en belang in de familiesfeer'. The doctoral research was supervised by Prof. F. Sonneveldt and Prof. A.O. Lubbers.

On 7 March 2019, Maria de Jong-de Kruijf defended her thesis 'Legitimiteit en rechtswaarborgen bij gesloten plaatsing van kinderen'. The doctoral research was supervised by Prof. mr. M.R. Bruning en Prof. mr. T. Liefaard.

Bij de Universiteit Leiden zet onze Onderzoeksgroep violence and violence prevention zich in voor het bevorderen van kennis en begrip op het gebied van geweld en geweldpreventie door middel van interdisciplinaire wetenschappen en innovatieve methodologieën. Onze faculteitsleden zijn toonaangevende…

On 30 June 2021, Thijs Beumers defended his thesis 'De bescherming van immateriële contractuele belangen in het schadevergoedingsrecht'. The doctoral research was supervised by Prof. A.G. Castermans and Prof. W.H. van Boom.

Unmanned aerial vehicles (UAVs), often referred to as drones, have become easy and inexpensive to buy, and it is generally expected that the use of drones by private individuals, businesses and public authorities will increase tremendously in the coming years. This raises questions as to what is technologically…

On 9 April 2020, Mohamed Azizi defended his thesis 'Reflecties op Wereldburgerschap: In de spiegel van Afghanistan en Nederland'. The doctoral research was supervised by Prof. P.B. Cliteur en Prof. W. Veugelers (Universiteit voor Humanistiek).

De roep om regie op Digitalisering en kunstmatige intelligentie wordt steeds luider. Reijer Passchier, universitair docent staatsrecht en hoogleraar digitalisering en de democratische rechtsstaat, stelt in Trouw dat dit belangrijke thema nu tussen ‘wal en schip dreigt te vallen, omdat niemand in Den…

Met groot plezier heeft de Universiteit Leiden van 1 tot 4 november het X Congreso Internacional de la Asociación de Hispanistas del Benelux (AHBx) georganiseerd, met het thema Transhispanismos: contactos y contagios (Transhispanismes: contact en besmetting). De AHBx is een platform in de Benelux dat…

According to the LUMC, patients experience 30% fewer serious side effects when medication doses are tailored to their DNA.

This thesis focusses on the temperature structure in protoplanetary disks. The relation between structures seen in the dust and gas-phase molecules is investigated.

On 20 October 2021 Michael Ramsden defended the thesis 'The Role of the United Nations General Assembly in Advancing Accountability for Atrocity Crimes: Legal Powers and Effects'. The doctoral research was supervised by Prof. N.M. Blokker.

Tuberculosis (TB) is a major global health problem caused by the bacterium Mycobacterium tuberculosis (Mtb). In 2015, there were estimated to be 10.4 million new cases and 1.8 million deaths ascribed to TB, making it one of the top 10 causes of death worldwide. Unfortunately, the only current registered…

This article examines leadership encouragement and psychological safety as antecedents of prosocial rule-breaking (PSRB) behaviour.

Leids onderzoek naar bestraffing komt tot stand uit verschillende disciplines. Het onderzoeksproject kent een juridische, criminologische, sociaalwetenschappelijke en filosofische invalshoek.

More collaboration, combining data and asking the right questions. These are a few of the recommendations that policymakers and researchers formulated at the conference 'Data gedreven Beleidsontwikkeling' on 28 November 2017.

In their article; The Effects of Legal Measures to Empower Supervisory Directors: Evidence from a Financial Distress Perspective, Santen and De Bos discuss the relationship between the corporate governance structure of a company and its financial performance. Until now studies predominantly hypothesize…

First author Scott Waitukaitis and principal investigator Martin van Hecke have made the cover of Nature Physics with their publication on a newly discovered effect. The Elastic Leidenfrost effect explains why hydrogel balls jump around on a hot plate making high pitched sounds.

Four years of protracted negotiations and bitter warfare passed between the declaration of Indonesian independence on 17 August, 1945, and the official transfer of sovereignty on 27 December, 1949.

In this new edition of the Rijmbijbel there are 159 valuable miniatures, combined with commentary by MA-students from Utrecht. Students in Dutch Language at the universities of Antwerp and Leiden have translated the text passages. Various experts, such as Martine Meuwese (UU), tell more about Jacob…

Promotor: A. Achúcarro, Co-promotor: A. Boyarsky