It depends on the condition, the severity, and the treatment goals. Your occupational therapist will share their recommendations with you following the initial assessment. You are free to accept or refuse the treatments that are offered in occupational therapy.
An initial adult assessment session can be 60 minutes or 120 minutes in length. The intervention sessions last 30 minutes or 50 minutes, depending on the needs. In paediatrics, the sessions last 30 minutes or 50 minutes, depending on the child's attention span.
No dress code is required in mental health. However, it can be beneficial to wear comfortable clothing for your movements for your physical health sessions.