The study was terminated due to consequences of the Covid-19 pandemic, which made it impossible to complete the trial in a timely manner and in accordance with the study protocol

The study is a randomized controlled trial evaluating the clinical and cost-effectiveness of Tuning in to Kids (TIK) compared to treatment as usual (TAU). Participants are recruited among referred children aged 2-5 years with difficulties with emotion regulation. The study setting is Child and Adolescent Mental Health Services clinics. Parents of children randomized to TIK will attend 8 two-hourly group sessions. A brief version of TIK will be offered to the child's daycare teacher. Participants are assessed at baseline, week 12 and month 9 after inclusion. The primary clinical outcome is Coping with Toddlers' Negative Emotions Scale.

Inclusion Criteria:

• Referred children aged 2-5 years
• The child is enrolled in daycare
• The child is displaying problems with emotional dysregulation

Exclusion Criteria:

• Parent not sufficiently proficient in Norwegian Language to Complete assessment
• Child Protective Services have ongoing assessment where the outcome may be that the child will be placed in care outside of the home of the biological parent(s) or other current caregiver
• The child has already been diagnosed with an autism spectrum disorder

Outcome assessors are blinded to treatment condition and receive no information about which treatment the participant will receive or have received.