The purpose of this study is to examine the initial efficacy of a psycho-social, metacognitive-functional intervention for Adults (Cog-Fun - A) with Attention Deficit Hyperactivity Disorder (ADHD).

It is hypothesized that participants in the Cog-Fun - A intervention will demonstrate improvements in measures of executive functioning, occupational performance and quality of life.

The Cog-Fun - A is a structured occupational therapy intervention for promoting self management in adults with ADHD. The protocol comprises three central treatment modules: Adaptive self awareness, executive strategies and skill implementation and multi-context transfer of strategies and skills.

The intervention is administered by occupational therapists on an individual basis, once a week, over 3-4 months.

20 participants will be recruited through community advertising. Sample size was determined based on expected moderate effect sizes. Data will be collected at the onset and completion of the intervention. Data will be analysed using quantitative and qualitative methods.

Adverse events if occur will be reported to supervising psychiatrist and the Helsinki Committee.

Inclusion Criteria:

• ADHD diagnosed by certified medical practitioner
• Adult ADHD Self Report Scale (ASRS) score above cutoff
• BRIEF-A score above cutoff

Exclusion Criteria:

• Diagnoses of severe neurological or psychiatric health condition.
• Instability in pharmacological treatment
• Brief Symptom Inventory (BSI) above cutoff according to Israeli adult norms