Depression or ADHD? Neatly delineated diagnoses fail to do justice to the infinitely complex reality that they refer to, argues Eiko Fried in a new paper for JAMA Psychiatry. His proposal: to map the underlying mechanisms of mental health problems using a Mental Health Atlas.

Why do some smokers quit much more easily than others? Can we think ourself to insomnia? And does playing music together help to calm conflicts? Psychology students investigated these questions and presented their findings during the Psychology Science Day 2023.

Begin oktober vond de eerste Psychology Connected van dit nieuwe academische jaar weer plaats. Met de vallende herfstbladeren voelen velen zich ook somberder. Onderzoekers delen hoe je een winterdepressie verzacht, en hoe je als ouder het beste kunt omgaan met de depressieve klachten van je kind.

The research conducted at the Health, Medical and Neuropsychology unit investigates the psychological factors of health and disease, which allows for the development of innovative treatments.

Even though it is generally known that Autism and ADHD are more common in men, and depression or anxiety disorders are more common among women, it is still not well understood if, how and when sex differences impact neurodiversity and mental health. To better understand this complex issue, 25 international…

Never before has so much research been carried out on the therapeutic effect of psychedelic drugs. Researchers at the LIBC Public Day are happy about the effect the drugs can have on depression, anxiety and PTSS, but at the same time they have some doubts. ‘The hype is bound to crash before long.’

How can parents avoid passing on stress and mental health problems to their children? Professor of Stress-Related Psychopathology Bernet Elzinga develops simple interventions to help both parents and young people. For her research, she has been awarded the Spinoza Prize, the highest academic honour…

Brothers and sisters within a family, with the same parents, experience their upbringing differently. As well as the impact of their own negative experiences, the way siblings experience their upbringing also plays an important role in anxiety and depression. This is the conclusion reached by Marie-Louise…

Although it can be a challenge at times, parents should keep communicating with their teens. Also about how they parent. Research by developmental psychologist Loes Janssen shows that parenting can be perceived quite differently by family members and mood plays an important role. Parents often parent…

On 28 November 2025, Leiden University and PLNT Leiden hosted “The Knowledge Orchard” - an event aimed at starting up/ enhancing interdisciplinary cooperation between academics at Leiden University, and improving collaboration between Leiden researchers and external partners in research and educatio…

The Department of Company Law and Financial Law provides education and conducts research in areas including company and corporate law, financial contract- and liability law, corporate governance, sustainability, Dutch and EU financial regulatory law, mergers and acquisitions, insolvency law, and international…

Steps to take if you need a student visa for your upcoming studies.

Steps to take if you need residence permit only, and not a visa, for your upcoming studies.

Computers are capable of making incredibly accurate predictions on the basis of machine learning. In other words, these computers can learn without intervention once they have been pre-programmed by humans. At LIACS, we explore and push the borders of what a revolutionary new generation of algorithms…

Steps to take if the documents to meet your admission conditions will be issued late.

Proceedings of the 25th International Congress of Roman Frontier Studies 1

The research project SOG Pro (Structure of Government project) studies the changes in the structure and organization of central government in four parliamentary democracies: France, Germany, the Netherlands and the United Kingdom and aims to explain the changes within and across each country. Why are…

A measured yet theoretically innovative exploration of how Islamophobia and radicalisation intersect and reinforce each other.

Update : August 2017 Dr Harco Willems

Promotores: Prof.dr. G.A. Persoon & Prof. dr. H.H. de Iongh

The Institute of Political Science is a vibrant department with nearly 70 academic staff in Leiden and nearby The Hague.

The Cardiovascular Pharmacology research group headed by Ilze Bot aims to elucidate the mechanisms that underlie atherosclerotic plaque destabilization, which is the key process that leads to acute cardiovascular syndromes such as a myocardial infarction or stroke.

Leiden University College (LUC) offers a Liberal Arts & Sciences programme, which is small in scale and intensive. You will go through a selection procedure where our admissions committee will assess your fit for LUC. In order to be considered for admission all applications need to apply in Studielink…

In the Catalysis and Surface Chemistry group, we investigate how catalysis works on the molecular level. The group is divided in six subgroups, focusing on different aspects of heterogeneous catalysis, homogeneous catalysis and electrocatalysis.

Proceedings of the 25th International Congress of Roman Frontier Studies 2

This research sets out to answer the following questions:

The 2012 crisis in Mali, where the state collapsed and terrorist groups took over the north, came as a surprise to many. Mali had been considered a poster-child for democracy and was judged as considerably more stable than its neighbors by leading quantitative indices of state fragility. This article…

Feedback from fellow students on academic writing is as informative as that of teachers.

Research in the van Exter lab focuses on quantum aspects of light and light-matter interaction. One of our long-term goals is to develop a reliable quantum memory, based on a single emitter in an open micro cavity.

Leiden University College (LUC) offers a Liberal Arts & Sciences programme, which is small in scale and intensive. You will go through a selection procedure where our admissions committee will assess your fit for LUC. In order to be considered for admission all applications need to apply in Studielink…

At LUCL we study almost all aspects of a wide range of African languages. From phonology to anthropological linguistics, from theoretical syntax to urban youth languages, we study it all.

The gripping story of a collective passion for freedom that shook the world.

Malfunctions and scheduled maintenance of ICT systems.

The LUC Fund is part of the Leiden University Fund (LUF). The Fund is managed by LUC’s administrative staff and overseen by a Spending Committee consisting of staff and alumni. Together they are responsible for the allocation of available resources, identifying funding opportunities, and developing…

The illegal use of hand grenades has generated a lot of public interest over the last few years but very little is known about the nature and extent of these incidents. This research project is trying to fill that gap.

The International Institute of Air and Space Law is one of the leading international academic research and teaching institutes in the world, specialising in legal and policy issues regarding aviation and space activities in the broadest sense of the word.

In June-August 2010 large scale excavations were executed on the cemetery belonging to the monastery, an area now termed the Paardenmarkt, by Hollandia Archeologen in cooperation with Leiden University. During the course of nine weeks, the students from the former minor Human Osteoarchaeology excavated…

Proceedings of the 25th International Congress of Roman Frontier Studies 4

Proceedings of the 25th International Congress of Roman Frontier Studies 3

The Hazelhoff Centre for Financial Law provides academic teaching and performs research in the field of financial law.

The BPS and Education specialisation consists of 120 European Credit Transfer System (EC) points and consists of a BPS component (60 EC) and an education component (60 EC).

The Biology and Education specialisation consists of 120 European Credit Transfer System (EC) points and consists of a Biology component (60 EC) and an education component (60 EC).

The opening times of the Humanities buildings vary. The Lipsius building is opened during evenings as well, the other faculty buildings retain office hours.

LUCIS promotes high-quality research on Islam and Muslim societies and actively communicates the insights and findings of that research to the larger public.

The portal for prospective Indonesian Students contains information about the possibilities to study at Leiden University in the Netherlands.

The area will undergo major changes, in a phased plan. Teaching will continue during this period. The existing education buildings will be tackled one by one. Some of the buildings will be reconstructed, and for others the building shell will undergo renovation. The Humanities Building is expected to…

The Physics and Education specialisation consists of 120 European Credit Transfer System (EC) points and consists of a Physics component (60 EC) and an Education component (60 EC).

The Leiden Institute of History approaches early modern and modern European history from comparative and transnational perspectives.