Humans share meaning through language. Over time, repeated interactions have shaped languages into forms that match our cognitive preferences, making them structured, expressive, easy to learn, and ultimately, meaningful.

Promotor: J. N. Kok, Co-promotor: A. J. Knobbe

Collaboration, Mediation, and Comparison is a special issue edited by Cristina Grasseni and Federico De Musso.

In this study we aimed to examine teacher learning within a context of collaboration in interdisciplinary teams.

This project will transform OpenML, a platform for sharing and creating datasets and AI models transparently and collaboratively, into a next-generation open science infrastructure.

Damien Van Puyvelde and Paul Oling explore how government intelligence agencies can effectively collaborate with the private technology sector to meet their evolving technological needs, focusing particularly on emerging technologies such as artificial intelligence (AI) and quantum computing.

Opting more often for mocktails or soft drinks rather than beer or wine, talking to others about their drinking and pointing out the ban on drugs. Leiden University’s new covenant on alcohol and drugs for study associations encourages providing more alcohol-free alternatives.

What are the various forms of inter-organizational collaboration in the public safety sector? How are different forms of inter-organizational collaborative arrangements related? What is the relationship between inter-organizational collaboration and innovation in the public safety sector?

Promotor: Prof. dr. Arnold Tukker & Prof. dr. René Kemp (Maastricht University)

The article 'Co-productive agility and four collaborative pathways to sustainability transformations' is published in Global Environmental Change and accessible via OpenAccess. Professor Anthropology of Sustainability and Livelihood Marja Spierenburg of the Institute of Cultural Anthropology and Development…

The study aims (1) to track progressive changes over time in trainees, and (2) to identify influences that facilitate or impede trainee development. Systematic information will be gathered on the characteristics of trainees and training programs, focusing particularly on trainees’ experiences in clinical…

Pieter Jakob Cosijn (1840-1899) was Leiden University’s first Professor of Germanic and AngloSaxon Philology. A recognised expert in the field of Old English grammar and textual criticism, Cosijn corresponded with various prominent philologists and experts in his field, including Julius Zupitza, Arthur…

How do Humanitarian Response Organizations (HROs) and Virtual & Technical Communities (V&TCs) collaboratively govern disaster sensemaking processes, and what challenges shape the effectiveness of these collaborations between 2010 and 2016?

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 goal of the Kenniswerkplaats Diversiteit is to answer research questions schools in the Hague have in collaboration with the schools. The aim is to offer all children the same opportunities to develop through education.

Promotores: Prof.dr. G. Miley & Prof.dr. J.M. van den Broek

This lecture will be hosted on Thursday, 11 June 2026 at 6:00 pm.

In this project, researchers from computer science, law, psychology, and public administration research in practice how artificial intelligence (AI) can be leveraged to make decision-making in the security domain more effective, while also keeping it safe and accountable.

People with a mild intellectual disability (MID) experience more loneliness than people without MID. In the COLLELO project, researchers from social and humanities disciplines collaborate with people with MID and their (in)formal networks to create an (online) learning community that aims to understand…

Our Mission: To optimize human well-being within the constraints of planetary boundaries through innovative research, education, and partnerships that advance sustainable production and consumption. We strive to remain global leaders in developing and applying systems-based approaches, methodological…

The global agri-food system plays a critical role in food security and environmental issues.

In multi/many-core System-on-Chips (SoCs), the performance is almost linearly scaling with the number of processing elements.

Which consumer groups post the greatest cost to public health and the planet through their food choices, and how can we use this fine-scale information to accelerate a sustainable dietary transition?

What is Leiden University doing to reduce energy consumption and move away from fossil energy? Where can you find information about energy? And what changes can you make yourself?

The main aim of the project is to collect and update on a regular basis bibliometric and patent indicators that can be used to underpin and inform analyses pursued at the European Commission (EC) to assess European and national scientific and technological performance.

Reflective dialogue is an effective instrument for professional learning of teachers. This research considers the characteristics, development, stimulating and limiting conditions for reflective dialogues in the context of Dutch primary school teachers who collaborate and learn together. The goal is…

When I am working with master's students, I often hear myself or my colleagues praising the importance of establishing good relations with collaborators in the field

This project investigates how the first generation of Dutch printed books (the incunabula, 1473-1501) affected late medieval spirituality, religious practice and visual culture in the Low Countries.

Cristina Grasseni and Ola Gracjasz organize and participate in workshop with Polish scholars in Gdynia, Poland.

The Faculty of Social and Behavioral Sciences is working hard on sustainability in its buildings and in its operations. In this way, we want to do our part to contribute to the university and faculty vision and goals, and to a healthy and sustainable campus.

International trade has played a major role in defining the modern global economy. Trade, however, entangles the environmental pressures of economic sectors, giving the illusion of environmental improvements, while the opposite may be occurring.

This thesis addresses the problem of designing performance and energy efficient embedded streaming systems, that is, systems which process a stream of input data coming from the environment and generate a stream of output data going into the environment.

This study focused on how households' food consumption and waste were adapted to lifestyles during COVID-19.

Ruobin Han defended her thesis on 21 March 2017

We would like to present to you a simple guidebook about living a sustainable life as a student in the cities of Leiden and The Hague. Whether you are a first-year student still trying to find your way around or already doing your masters – students wanting to explore more sustainable options and save…

On 11 June 2020, Sabine Witting defended her thesis 'Child Sexual Abuse in the Digital Era: Rethinking Legal Frameworks and Transnational Law Enforcement Collaboration'. The doctoral research was supervised by Prof. J.J. Sloth-Nielsen and Prof. S. van der Hof.

On 21 November 2018, Lieke Kools defended her thesis 'Essays on wealth, health, and data collection'. The doctoral research was supervised by Prof. dr. K.P. Goudswaard en Prof. dr. C.L.J. Caminada.

NimbleAI aims at solutions for ultra-energy efficient and secure neuromorphic sensing and processing at the edge.

Decarbonizing the building stock is critical for realizing the climate-neutral target for the Netherlands.

Around 1.8 million years ago, early hominins moved into Eurasia and adapted to colder climates and unfamiliar ecosystems. This project investigates whether innovations in diet such as eating new plants or applying new techniques for food processing (cooking or fermentation) contributed to this major…

Southern Africa has a rich tradition of social history, one inspired by the tumultuous changes that have regularly convulsed the region from the 1780s onwards. Scholars have always sought to understand what these changes meant for everyday life and emphasised a perspective of marginal groups, how these…

Music profession requires strong reflective, collaborative, creative and improvisational skills, yet prevailing one-to-one tuition in conservatoire education focuses mainly on transmission of craft skills. Examining effects of students' collaborative and experiential learning, as in learning labs, creates…