About the EARLY Study:

The EARLY Study aims to understand how personality develops during adolescence.

What will I do?

• Complete two online questionnaire sessions
• First session: shortly after registration
• Second session: three years later
  (For example, if you start in 2025, you will be contacted again in 2028.)

How long does it take?

• Each session: about 45 minutes
• Total time: about 90 minutes over three years

What are the questions about?

• Your thoughts and behavior in everyday situations
• Questions about you and your experiences

Who can participate?

• Adolescents aged 11 years or older
• Parents will also be asked to complete questionnaires about you and themselves
• Your participation is independent of your parents’ — you can take part even if they do not

How does it work?

• Participate from home
• After registration, you will receive an email with a link to the online questionnaires
• Complete each session at a time that is convenient for you

Your choice

• Participation is voluntary
• You can withdraw at any time
• We aim to make this a positive and comfortable experience

Why participate?

• Help advance research on personality development
• Support better guidance and interventions for children and families

Study design

• Below is a visual representation of the study design
• The boxes represent the two online questionnaire sessions
• The arrow represents the three-year interval between them