Efficiently responding to others’ emotions has great survival value, especially for social species, such as primates, who establish close, long-term bonds with group members. The closest living relatives to humans are the chimpanzee and the bonobo. Studying these species, and comparing them on the exact…

Many dangerous diseases such as COVID-19, Ebola and Q fever have jumped from animals to humans. But it is not only because of these diseases that we should include animals in our health policy, but also because of their right to health.

Researchers from Leiden University are working with Ouwehands Zoo to improve our understanding of emotions and intelligence in orangutans. Visitors to the zoo can now watch orangutans as they play with computer touch screens.

Humans and bonobos show striking similarities as well as differences when they see pictures of conspecifics. Both are more interested in photos of conspecifics that show emotion. But while our human attention is more easily drawn to photos of family members and friends that express certain emotions,…

For the first time, contagious yawning has now also been found in a species that roams its territory mostly in solitude and is less frequently engaged in social interactions: the orangutan. Publication in Nature Scientific Reports by an international group of scientists with lead-author Evy van Berlo,…

Neuropsychologist Mariska Kret is through to the next round in the 2016 Science Talent contest organised by New Scientist magazine.

It is important for social animals to be able to recognise one another quickly. Humans are able to recognise each other immediately from their faces. Faces are also important for chimpanzees, but a new study by neuropsychologist Mariska Kret in PLOS ONE shows that the animals' buttocks also play a…

Bonobos – just like humans – pay more attention to pictures that show other members of their species displaying emotional behaviour than to neutral scenes. Leiden researcher Dr Mariska Kret made this discovery while conducting research at Apenheul Primate Park.

Great apes and the right to health

Aesthetic attraction plays a big role in orangutans’ mate choice, behavioural biologist and PhD candidate Tom Roth has observed. But to discover just how big that role is, more research is needed into the emotions of the great apes.

Young babies laugh like adult apes do: producing sounds while inhaling and exhaling. Adult humans produce sounds on the exhale only. Cognitive psychologist Mariska Kret and colleagues have published an article about the development of human laughter in the journal Biology Letters.

Metamaterials researcher Martin van Hecke has been elected American Physical Society (APS) fellow, an honour exclusive to only half a percent of the society's members.

Physicists Carlo Beenakker and Jan Aarts have been elected Fellows of the American Physical Society. Carlo Beenakker: 'People acknowledge your contribution, that is just very good to hear.'

Although open science reforms have contributed to a more rigorous and robust psychological science, there is still much to improve. In Association for Psychological Science (APS), Eiko Fried points out two norms that open science reforms may have overlooked so far: communalism and universalism. 'Incorporating…

Great Auditorium Organ Foundation is a Public Benefit Organisation (Algemeen Nut Beogende Instelling, ANBI)

We study expressions of emotion and social decision making across species.

Promotor: Prof.dr. S.F. Portegies Zwart

In this course, you will learn about sustainability and staying with the environmental boundaries of our planet. You will gain an understanding of the effects of growing affluence and population growth, the key challenges we are facing, and ways to influence your direct environment.

Are traces of fire use detectable in ancient hominin genomes?

The Cognitive Psychology Unit has two main research lines, which focus on basic cognitive (neuro)science and applied cognitive psychology.

Timo Slootweg, associate professor at he department Philosophy of Law, published a chapter about Paul Scholten in

Drawing on the analogical lessons of the Great War, this article uses applied history to analyze how the four parallels discerned can help us make sense of contemporary Sino-American rivalry

Larissa Mendoza Straffon and colleagues investigated visual attentional biases toward self-made artworks, which tend to be favoured, remembered, valued, and ranked above and beyond objects that are not related to the self. Their findings confirm that attention and preference are higher for self-made…

The Faculty of Science and the Leiden Academic Centre for Drug Research are looking for an:Analyst position in projects in animal stem cell models Key responsibilitiesThe analyst will be integrated in a research team that investigates a new research direction that connects the efficiency of stress response…

Mariska Kret, Professor in Cognitive psychology has been awarded the European Research Council (ERC) Public Engagement with Research Awards 2022. Kret convinces the jury with 'RecognizeYourself - Bringing science to the zoo. Involving the public into the study of great apes emotions'.

In this episode, we talk with Mariska Kret about the expressions of emotions in humans and animals. Mariska explores the similarities and differences in emotion expression in humans and primates. Want to learn more about Mariska's research and discover why it's important that we learn more about animal…

On the 2nd of September, Hang Cheng successfully defended a doctoral thesis. The Leiden University Centre for Linguistics congratulates Hang on this achievement!

The receptor nomenclature committee of IUPHAR, the International Union of Pharmacology, has several subgroups. Among these are a few that our division is involved in, those for adenosine, nicotinic acid, and GnRH receptors.

Research question

Researchers of the National University of Singapore and Leiden University have discovered that chimpanzees and bonobos share the contrasting colour pattern seen in human eyes, which makes it easy for them to detect the direction of someone’s gaze from a distance.

Young children are not just cheeky monkeys — it turns out they actually laugh like chimpanzees, too. 'That’s because both babies and chimps chuckle while inhaling and exhaling, unlike adult humans who laugh mainly during exhalation', says cognitive psychologist Mariska Kret on Techregister.

Allosteric modulation has long been recognized as a general and widespread mechanism for the control of protein function. Modulators bind to regulatory sites distinct from the active site on the protein, resulting in conformational changes that may profoundly influence protein function. This concept…

Professor of Cognitive Psychology Mariska Kret studies how humans and animals express emotions. Comparisons between humans and great apes offer important evolutionary insights, Kret will say in her inaugural lecture on Friday 9 September.

The territories that would make up what is today the Republic of Zambia officially became British in 1891. However, this did not equate to an on-the-ground presence of colonial authority capable of affecting the destiny and daily lives of people.

How do people acquire language? How can you train your brain? What is the effect of stress on an unborn child? LIBC research topics range from language processing to cognitive robotics, and from psychiatric disorders to the impact of social factors on human behaviour. Meet several main research topics…

This research project focuses on the extended documentation and investigation of these non-Austronesian (‘Papuan’) languages.

On Thursday 18 December, 170 first-year pupils from Gymnasium Haganum visited Leiden University’s Faculty of Governance and Global Affairs (FGGA) in The Hague. The faculty has developed The Great Migration Game (Het grote Migratiespel) as a fun way to introduce pre-university pupils to its fields of…

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Our world is shrinking, or at least our electronic devices are. From PCs to mobile phones: everything is smaller and thinner. The smaller the chip, the better it can conduct electricity and pass on information.

The world is becoming increasingly digitised, and the information one has easy access to is often rather overwhelming. In particular, the accumulative nature of the archaeological practice has resulted in huge quantities of data being produced. But how to prevent these from becoming dust-collectors…

In his new six-hour series, Africa's Great Civilizations, Henry Louis Gates, Jr. takes a new look at the history of Africa, from the birth of humankind to the dawn of the 20th century. One of the experts interviewed in the programme is our own dr. Sada Mire.

On 29 January, the Mayor of Leiden, Henri Lenferink, was awarded Leiden University’s Scaliger Medal. The longest-serving Mayor of Leiden was presented with the medal by the University’s longest-serving Rector Magnificus, Carel Stolker. Lenferink was awarded the medal in recognition of his achievements…

It is well-known that humans have significantly transformed ecosystems since their adoption of agriculture. However, in a deeper past, prehistoric hunter-gatherers may already have altered and modified their niche in ways that had major impacts on ecosystems.

We investigate the physics and design of mechanical metamaterial, intricately sculpted materials with properties set by their architecture.

Getting personal

How do common marmosets combine their calls into sequences and how are their vocalisations influenced by reproductive state?

The pandemic has challenged us to revisit the way we structure education and how to reach out to students remotely. It almost seems fitting that a course devoted to a topic so closely related to the context of the corona crisis, that of global health, would explore the possibilities of making the course…

In the academic year 2018 - 2019, the Faculty of Humanities established the Educational Innovation Programme. In this way, the faculty wants to realise the ambitions from the educational vision of Leiden University in education. How is the programme currently doing? We talked to project manager Sanne…

How anonymous is an individual in a social network? And is it possible for hackers to extract sensitive information from data? These were the main topics of the hackathon organized by POPNET and the Central Bureau of Statistics (CBS) on May 3 at the Leiden Institute of Advanced Computer Science.