Missing legends, illogical connections or three-dimensional graphs. There are many ways in which data can deceive. Five students took up the fight against misleading statistics. Their lesson series can now be found online.

Emeritus Professor of Applied Statistics Jacqueline Meulman received an honorary membership during the annual meeting of the Netherlands Society for Statistics and Operations Research (VVSOR). This makes her the eleventh honorary member of the society.

How do forensic scientists deal with complex DNA-evidence found at crime scenes? Giulia Cereda developed new statistical models to analyse them. PhD defense 12 January.

Some examples of AI-research done at Leiden.

Students and lecturers from around the world who have obtained international training, experience and exposure bring an international and multi-cultural perspective on psychology and being a psychologist to class.

Information about doctorates and application procedures for PhD positions at ICLON

he master’s programme in Psychology focuses both on in-depth study of theory and on the acquisition of professional and research skills. The distinctive feature of the Leiden master’s programme is that the teaching is not restricted to only the functioning of psychological processes; these processes…

United Nations Global Pulse, an initiative of the UN Secretary-General on big data and AI, recently launched the Data Fellows program. Kevin Duisters, PhD in Statistics at the Mathematical Institute, was selected to take part in its first cohort of eight international students.

Synthetic methodlogy is described, aiding in the synthetic preparation of putative inhibitors of retaining and inverting glycosidases and glycosyl transferases. All constructs are cyclophellitol-based cyclitols.

On 31 January 2014 Professor Willem Heiser (Psychology, Statistics and Data Theory) was awarded the distinction of Knight in the Order of the Dutch Lion. After his farewell lecture he received the royal honour for his exceptional academic, social and administrative achievements.

This 3-year EU Erasmus+ co-funded project focuses on the strengthening and improvement of teaching qualitative research methods across a range of disciplines in the Social Sciences and Humanities in Bhutan.

To conclude, this thesis provides valuable methodological insights to address data gaps and improve environmental impact assessments within the circular economy, with a particular focus on product reuse and sharing practices. Through empirical analysis and innovative approaches, it aims to support informed…

The ultimate goal of cosmologists is to find a cosmological model able to explain the current observational data.

Promotor: P.D. Grünwald

Using mathematics to help children with bone cancer. It sounds a little strange, but for statistician Marta Fiocco, it's just her job. She gets a substantial grant from KiKa for it. With that money, she is going to study the effect of chemotherapy adjustments.

Jaroslaw Kantorowicz examines how strategic climate litigation influences public attitudes on climate policy, using a UK experiment to explore legal cues.

Willem Heiser receives the 2017 Psychometric Society Career Award for Lifetime Achievement. 'Receiving this prize from my colleagues makes me very happy.' Heiser is professor emeritus in Psychology, Methodology and Statistics at the Leiden Faculty of Social and Behavioural Sciences and professor of…

The International Bachelor in Psychology in Leiden takes you along all the different subdisciplines in Psychology.

Using mathematics to determine whether scientific results are significant or not. Peter Grünwald, full professor of Statistical Learning at the Mathematical Institute (MI) and senior researcher in the Machine Learning group of Centrum Wiskunde & Informatica (CWI), has been awarded an ERC Advanced Grant…

After an introductory first year, in the second year you will learn more about the four themes: the sustainable city, the safe city, the multicultural city and the healthy city. In years two and three you will have elective options, including a minor, studying abroad and an internship.

Promotor: Prof.dr. B.R. Katzy, Prof.dr. H.J. van den Herik, Prof.dr. G.H. Baltes (University of Applied Sciences Konstanz)

Assistant Professor Lucie Zicha at Leiden University College (LUC) in The Hague is on a mission to bring statistical literacy to all undergraduate students.

Imagine how much time, money and discomfort it would save: a personalised treatment for each individual patient. Precision medicine like this is coming ever closer, thanks in part to Elise Dusseldorp’s algorithms. They retrieve a wealth of information from research data.

Where you end up depends on the chosen study direction, your own skills and interests.

Get to know us through our online and in-person events for prospective students!

The Executive Board and the Board of Education of the Institute of Psychology are responsible for the organisation. A number of committees offer specialised knowlegde, such as the Research Ethics Committee. Students have a say in programme committees.

Why use Google Maps when you can also calculate your bike route based on your own data. Statistician and cyclist Alexander Dürre sees statistics in everything around him. He analyses data of soccer games and calculates the possible winners of cycling races. ‘When I have too much time, I apply statistics…

Detecting planets during their formation stages is crucial for understanding the history and diversity of fully developed planetary systems like our own. However, observing young planets directly is challenging because they are often deeply embedded within their host protoplanetary discs, rich in gas…

To be eligible for this master's specialisation at Leiden University, you must meet the following admission requirements.

To be eligible for this master's specialisation at Leiden University, you must meet the following admission requirements.

To be eligible for the master's specialisation Applied Cognitive Psychology at Leiden University, you must meet the following admission requirements.

Is this the master's specialisation of your choice? Please read here about the admissibility for this programme.

On the Master’s Open Day on 15 February Liza Vromen from Harlem arrives in Leiden to investigate the pre-master’s programme Psychology. As a matter of fact she will look beyond that programme for a master’s specialisation which fits her personal interest.

The Sanquin blood bank gathers data on every donation. Around 720,000 donations are made every year. ‘That generates a mountain of highly valuable data,’ says Leiden PhD candidate Marieke Vinkenoog.

A retrospective impact assessment of human and environmental resource usage in Late Bronze Age Mycenaean Monumental Architecture, Greece

In this project we study the properties of statistical- and rule-learning mechanisms in relation to the acquisition and evolution of language. We ask to what extent these mechanisms are unique to humans - or to human language - by comparing the acquisition of vocal structure in two species: humans (infants)…

In this work, we attempt to answer the question:

As of 1 April 2025, Professor E.A.L.M.G (Elke) Moons has been appointed professor by special appointment of the chair ‘Crime Statistics’ at Leiden University’s Institute of Criminal Law and Criminology at Leiden Law School.

Zsuzsa Bakk has been selected as the winner of the 2016 Distinguished Dissertation Award of the Classification Society for her thesis entitled 'Contributions to Bias Adjusted Stepwise Latent Class Modeling'.

Classical statistical methods, such as p-values, are difficult for researchers to apply correctly. They for example do not allow drawing conclusions from a study early, or for extending a study with extra research groups that want to make their data available later.

The International Bachelor in Psychology (IBP) offers a broad academic development, with knowledge of several subdisciplines, such as clinical (neuro)psychology, developmental psychology, social and organisational psychology, economic and consumer psychology, cognitive psychology and health psycholo…