I am a behavioural biologist who has always been fascinated by how and why non-human animals cooperate with each other and how they form social relationships. I am intrigued by individuals helping each other (such as grooming, providing food and support) and how these behaviours could have evolved. Intimately connected with helpful behaviours is communication, which has always been a part of my studies. I study social interactions both in the lab and in the field. My main focus lies on cognitive and emotional processes that shape social decisions and is based on predictions derived from game theoretical models that I test experimentally. Besides I have always been interested in welfare and conservation issues.