This page provides information on what to do if you have been subjected to unacceptable behaviour.

Have you been subjected to concerning or threatening behaviour? Are you worried that a fellow student might pose a danger to others? Or do you have concerns about abusive behaviour in the home? If so, you can turn to the Advisory Team for Concerning or Threatening Behaviour.

Today, 13 May 2024, Leiden University’s Executive Board is publishing the advice of the committee that investigated reports of unacceptable behaviour and breaches of academic integrity. These reports were about a professor from the university and their partner (a former member of the university staf…

This is a difficult time. Above all, for all those directly involved in this horrible case – unacceptable behaviour by a professor and his removal from the University – the case we went public about on 18 October and that has been reported in the media. This is painful and tough for the complainants…

A professor from Leiden University has subjected various colleagues to intimidating and unacceptable behaviour for a longer period. These are the findings of an investigation carried out by the University’s independent Complaints Committee for Unacceptable Behaviour at the request of the Executive Board…

During Consent is Key Week, we’re exploring ways to eliminate sexual violence within our university community. We spoke to Assistant Professor Mischa Dekker, who specialises in gender-related violence, about how to prevent unacceptable behaviour among students and staff.

Receiving welfare benefits has a major impact on criminal behaviour. This has been demonstrated by Marco Stam, who defended his thesis on 20 January 2022.

Maaike Kempes works at the NIFP (Dutch Institute of Forensic Psychiatry and Psychology) and is also Professor by Special Appointment Enhancing Neuroscientific Knowledge at the Institute of Child and Education Studies at Leiden University.

Silke Herms is a PhD candidate at the Institute of Public Administration.

I suggest a systematic study into the influence of non-singing female companions on vocal learning in young birds as a proof-of-principle study into how non-imitative learning processes from the social environment influence the timing and content of vocal learning and thus drive the interface between…

I am a Postdoc and research the interactions between our gut microbes and the brain i.e. the science of ‘that gut feeling’. I am fascinated by the trillions of bacteria that inhabit our bodies and in particular the ways in which they may interact with our brain to influence our mood and behaviour. Bidirectional…

A professor from Leiden University, together with a former employee (who is also the professor’s partner), has been guilty of long-term unacceptable and often transgressive behaviour in the form of abuse of power and manipulation. This behaviour led to a culture of fear among staff who were largely…

It is sufficiently plausible that the professor from the Faculty of Archaeology exhibited the ‘inappropriate and unacceptable behaviour’ detailed in the advice of the investigating committee. That is is unless the professor provides counter-evidence. This is the conclusion of the Subdistrict Court…

Melanie Franse works as a PhD candidate at the Institute of Education and Child Studies of Leiden University. Melanie focuses specifically on the biopsychosocial profiles of juvenile delinquents to identify the different mechanisms underlying the development of delinquent behavior in adolescents.

Leiden Law Cast is a podcast made by Leiden Law School, Leiden University, for everyone who wants to learn more about current legal issues.

I am passionate about aquatic ecology, conservation and evolution, behavioural biology and global change. During my PhD, I am investigating the density and diversity of pelagic fish in and around offshore windfarms in the North Sea, more specifically related to the underwater acoustic conditions. This…

Anouk is a lecturer and a PhD candidate at the Institute of Political Science.

In his research, Van Gestel focuses on fundamental and applied research on health behaviour and behaviour change in an interdisciplinary context. He focuses on understanding the factors important for health behaviour (behavioural determinants) and on behaviour change techniques as building blocks of…

Cognitive biases affect how we perceive the world every day, but do they influence animal perception too? In my PhD project, I will study the cognitive biases in the acoustic perception in multiple species, to understand their origins and which role they play in the species-specific communication.

After researching inequity aversion in dogs and bonobos during her bachelor’s and master’s projects, Kia Radovanović conducted a study on cross-species pupil mimicry in dogs at the CoPAN Lab.

Simon Otjes is assistant professor Dutch Politics.

Bianca Boyer is an associate professor in the unit of Developmental and Educational Psychology. She studies the effectiveness of treatments for children and adolescents with neurobiological developmental disorders, particularly ADHD and Autism Spectrum Disorders.

My research focuses on the acoustic diversity of the marine environment, how it shapes the ecology of marine animals, and how sensory pollutants can disturb the behaviour of acoustically active animals.

At the New Year's reception on Thursday 16 January 2025, Bart Krans, as chairman of the jury, presented the prizes for the best master's theses of 2024.

I am interested in coping with stress, on both the behavioral and the physiological level of biological function. I am predominantly working with zebrafish, but also other species in the field. My approach is multi-disciplinary and integrative, including molecular biology, morphology, biomechanics and…