The Trondheim Early Secure Study (TESS) – A study of mental health, psychosocial development and health behaviour from preschool to adolescence

The Trondheim Early Secure Study (TESS) started in 2007 and comprises a sample of 1,250 children drawn from the 2003 and 2004 birth cohorts and their parents in Trondheim, Norway. The participants were examined when the children were 4 years old and they have been followed up with in-depth interviews, questionnaires, tests, and observations at ages 6, 8, 10, 12, and 14. The seventh wave of data collection (age 16) started in January 2020 and will be completed by June 2021.

The goal of the study is to determine the prevalence and course of common mental disorders, physical inactivity, eating behaviours and adiposity, and to detail potential etiological factors.

The TESS also aims to describe children’s typical development as well as determinants of individual differences in important aspects of functioning, such as personality, attachment, parent-child relationships, social and academic competence, self-concept, behavioral and emotional regulation, sexuality, cognition, physical activity, Internet gaming and social media use.

A thorough description of the study and its measurements can be found here:
Parents’ Personality-Disorder Symptoms Predict Children’s Symptoms of Anxiety and Depressive Disorders – a Prospective Cohort Study

The TESS is conducted in cooperation with the Department of Psychology, Faculty of Social and Educational Sciences, Norwegian University of Science and technology (NTNU) and Trøndelag County Council. The TESS is funded by grants from The Research Council of Norway and The Regional Health Authority.

Image – tess

Seven children in ascending age. Photo.