For its quantitative studies, ABC+ has developed specific approaches for each age group whose results are guaranteed to truthfully reflect the opinions of the interviewed youngsters.

• Questionnaires that account for the specific limits of each age group.
  
  
• Data collection modes that are adapted to each study (face to face, in a room or at home, phoning, mailing...).
  
  
• A climate of confidence for the youngest.
  
  
• A network of investigators trained by ABC+.
  
  
• A systematic supervision of field works.
  
  
• A panel of more than 1000 families and 2000 youngsters.