The study aims to evaluate the efficacy of a 5-week, therapist-guided, internet-delivered parent management training program (BIP SAMBA) targeting children aged 5 - 11 years with externalising behavior problems. The study is a randomised controlled trial with parents of N=30 children participating. The intervention BIP SAMBA is compared with a waitlist control condition. Participants in the control condition will be crossed over to the active treatment after 5 weeks. The primary outcome measure is the Eyberg Child Behavior Inventory (ECBI) at the post treatment (5 weeks after baseline assessment).

Inclusion Criteria:

• Being parent of a child between 5 and 11 years
• This child has externalising behavior problems
• The parent has access to the internet
• The parent speaks and write Swedish

Exclusion Criteria:

• The child has an autism diagnosis
• The child has severe conduct problems
• There is domestic violence occurring within the family
• There alcohol or substance abuse occurring within the family