Site search
Back to listing

Twins Early Development Study (TEDS)

About the cohort

Start date: 1994-96
Age at recruitment: 0
Sample size at recruitment: 13,690 (families)
Estimated current sample size: 21,800

The Twins Early Development Study is one of the foremost on-going twin studies of its kind in the world. With the help of over 15,000 families, TEDS researchers and academics are exploring how we develop through childhood and adolescence and what factors contribute to making each of us who we are. In this way, the great wealth of information gathered through the study is providing insights into how both nature (the genetic material and characteristics we inherit from our parents) and nurture (our environment) contribute to individual development in a range of areas, such as cognitive and learning abilities, and behaviour. The study has been going since 1994 and is based at King's College London under the leadership of Professor Robert Plomin.

Since recruitment the cohort has been contacted  11 times at age 2 years, 3 years, 4 years, 7 years, 8 years, 9 years, 10 years, 12 years, 14 years, 16 years and 18 years.

Core funders

  • Medical Research Council



Principal Investigator: Professor Robert Plomin


Freepost LON7567


Tel: 0800-317029 

Page last updated: 13 Mar 2015


  • Gender: Male, Female
  • Sample size: 10,000-19,999
  • Age: 0 to 9, 10 to 19
  • Anthropometric: Height, Weight, Waist circumference
  • Psychological: Mental health, Cognitive function
  • Lifestyle: Smoking, Dietary habits, Alcohol
  • Socio-economic: Occupation, Finances, Family circumstances, Education, Ethnic group, Marital status, Social support
  • Biological samples: Other