Meet the Team

For 50 years, I have studied genetic and environmental influences on psychological development. When I came to the UK from the US in 1994, I decided that what was needed was a large, systematic study of psychological development in twins beginning in infancy. With incredible co-operation from families of twins and continuous funding from the UK Medical Research for 25 years, TEDS has made some of the most important and surprising discoveries about the origins of individual differences in psychological development. TEDS has become even more valuable by integrating the classical twin design with the DNA revolution. These findings and their implications are described in overview in my book, Blueprint (Penguin, 2019) and in a 2020 interview with Sam Harris’ Making Sense podcast.

I would like to begin by thanking the TEDS twins and their families for all their time and effort without which the unique science we do simply would not be possible. I am really looking forward to working more closely with you all as I move into the role of Director. I am really excited about this next stage of TEDS, where we are increasing the focus on mental health. I have always been fascinated by how and why people react so differently to stress. This is particularly important in the mid-twenties as this is a time when many people first begin to experience mental health problems. I am keen to find out whether genetic differences are useful in trying to improve people’s lives. For example, one major theme in my group is using genetic information to help understand which type of treatment works for whom, in the hope that people can get the right treatment for them more quickly in the future. I am also thrilled that we are now meeting the third generation of the TEDS families, and that we already have over 500 families taking part in the Children of TEDS or CoTEDS study.

We regularly update the website to make it easy for other researchers to find out about the study so that we can make the best possible use of the data that has been collected in the past 25 years. We hope you can find everything you want to know, but if not, please get in touch on teds-project@kcl.ac.uk.

Read more about Prof Thalia Eley here. Follow her on Twitter @thaliaeley.

I have been working with TEDS since our participants were 7 years old. I was recruited to help with the large scale data collection that took place over the phone and I have taken part in many other phases of data collection over the years. My role now is to help plan studies and coordinate communication with our participants. We are fortunate to have so many active TEDS families helping with our research and it has been a great pleasure to follow the twins’ development into adulthood.

I joined TEDS at the end of 2001, during the age 7 twin telephone study, and have been the Data Manager since then. My work involves managing our admin database, where we record what happens to every family in each of our studies. I also handle all the data that are returned in questionnaires and web studies, documenting them and converting them to a suitable form for our researchers to analyse.

Louise joined TEDS in August 1996 as a research support worker. She manages TEDS finances and many administrative aspects of the study including recruitment of staff, preparing grant applications and monitoring publications. Louise has extensive administrative, historical and procedural knowledge of the study.

I joined the TEDS team in February 2021 as a Research Assistant. Since joining, I have helped to prepare and launch the newest phase of TEDS – TEDS26! I am interested in how genetic and environmental factors influence anxiety within families, in particular how family processes can shape children’s mental health. Before joining the TEDS team, I completed my BSc in Psychology at Goldsmiths, University of London.

I joined the TEDS team in February 2022 as a postdoctoral research associate. My research utilises the twin method as well as DNA data to examine how both genes and the environment influence the development of mental health problems and resilience to it. My latest project used the data from MZ twins and their DNA to investigate the genetic factors that are associated with greater within-trait twin differences for a range of mental health outcomes. I will be using TEDS data to examine questions relating to the trajectory of mental health problems and how genetic and environmental factors may influence these trajectories.

I joined the TEDS team in 2022, following my PhD in Psychology and  Statistical Genetics at King’s College London. My research focuses on psychological therapy outcomes for anxiety and depression, and how these relate to patient and therapy characteristics. I am currently a Research Fellow, primarily working on a project using linked medical records to better understand who benefits from therapy, with the aim of improving treatment outcomes. Outside of work, I love going to see live music, gardening, and reading fantasy novels.

I joined TEDS at the beginning of 2025 and have been working as Data Manager alongside Andy McMillan. My current role involves collecting responses for TEDS30, working with Andy to manage our study database and all aspects of data management for TEDS30 and associated sub-studies. I also generate custom data sets for researchers requesting TEDS data, including the generation of polygenic risk scores.

I joined the TEDS team in September 2025 as a Research Assistant, supporting day-to-day research activities and administrative aspects of the study. On days that I'm not in the TEDS office, I provide operational support to the academics and researchers in the Department of Women & Children's Health. Prior to joining King's, I worked for The School & Family Works - a small social enterprise that supports children facing adversity to succeed in school by building collaborative communities between schools and families. It was because of this role that I was particularly drawn to TEDS,  as I hope that increased understanding of genetic and environmental influences on abilities, behaviours and mental health will eventually filter down will eventually filter down to policy makers and support systems to help families like these better understand and manage some of the challenges they face during childhood and beyond.

I am interested in how and why cognitive, emotional, and behavioural traits run in families. It has been shown that children resemble their parents not only physically but also in terms of their intelligence, their behaviour, and on many psychological traits. These parent-child associations may arise because parents have a direct impact on the way that their children develop. However, almost all traits are under some degree of genetic influence so these parent-child associations could also arise because children share 50% of their DNA. For example, intelligent parents may rear intelligent children because A) they adopt parenting practices that nurture the development of intelligence in their children, and/or B) intelligent children may inherit a genetic propensity towards intelligence from their intelligent parents. My research is aimed at disentangling the role of the rearing environment from that of genetic transmission, and one particularly powerful way to do this is through the study of twins who have children.

I am therefore very excited that over the next few years we will be setting up the Children of TEDS study (CoTEDS). In this new study we will track the development of the CoTEDS children just as the development of the TEDS twins has been tracked. This time however, there will be an added focus on the role of the parent in child development. This will be the first study of it’s kind, where a sample of twins and their children have both been assessed and their development followed from an early age. This will provide us with a completely unique and powerful research resource. Using data from CoTEDS we will be able to address some age-old questions about the role of the parent in child development.

My research is focussed on understanding how common mental health problems run in families. I joined the TEDS team in 2015, as a Research Assistant working to set up the Children of TEDS (CoTEDS) project. I completed my PhD part-time alongside that role, supervised by Dr McAdams and Prof Eley. I am now a postdoctoral researcher in the group, where I continue to help run the CoTEDS project. Prior to working with TEDS I completed my BSc in Neuroscience from the University of Manchester.

I completed my BSc in Neuroscience and Psychology at the University of Manchester, and then spent 2 years working on brain imaging research at the University of Southern California, Los Angeles. I've now moved to London to work as a Research Assistant for the CoTEDS project alongside Dr Ahmadzadeh and Dr McAdams. I am interested in how parenting behaviours impact the development of behavioural problems in children and adolescence and so I'm excited to be working with CoTEDS to grow our research to incorporate the parenting experiences of TEDS twins. I am planning to start my PhD this summer with the TEDS/CoTEDS team, investigating intergenerational transmission of genetic and environmental risk for externalising behaviours. 

I joined the CoTEDS team as a Research Assistant in March 2024 to pursue my interests in child development and background in childcare after completing my MSc Psychology Conversion Degree in 2022. Before this, I was at the King’s Centre for Military Health Research where I worked with military personnel to investigate the effects of war on health and wellbeing. I am interested in the interplay between nature and nurture and its application in mental health treatments. In my free time, I enjoy nature walks and yoga.

I joined the CoTEDS team as a Research Assistant in May 2025. Prior to this, I completed my BSc in Psychology at the University of Bath, including a placement year at Boston University where I supported research investigating the influence of early experiences in child development. After graduating, I went on to work in roles within the NHS, including at a Talking Therapies service. Since joining CoTEDS, I have been helping the team to develop a new questionnaire for CoTEDS parents to complete when their child is aged 4-5 years old, during the transition to starting school. I’m excited to help launch this next phase of CoTEDS and contribute to research on how genetic and environmental factors shape child development.

Iona is a PhD student based in the Social, Genetic and Developmental Psychiatry Centre. Her research explores how social factors, treatment experiences, and identity contribute to intersectional inequalities in anxiety and depression. She uses quantitative and qualitative methods, as well as patient and public involvement and participatory research practices. Alongside her research, Iona gained policy experience as an intern at the Office for Health Improvement and Disparities. She is a member of her department’s Anti-Racism Working Group, and is passionate about research impact, policy and science communication.

Before starting her PhD, Iona was an operational scientist supporting clinical trials and digital health research. She has an MSc in Developmental Psychology and Psychopathology from King’s College London and a BA (Hons) in Natural Sciences (Psychology) from the University of Cambridge.