The purpose of this study is to develop a culturally and linguistically appropriate online cognitive behavioral intervention program-- with therapist guidance -- for Hong Kong Chinese adults suffering from major depressive disorder with mild to moderate depressive symptoms, and examine the effectiveness of this program in reducing their depressive symptoms and improving their mental health. The 3- and 6-month maintenance effect after 3 months and 6 months will also be tested.

Previous studies have demonstrated that online cognitive behavioral therapy can significantly reduce depressive symptoms and improve mental health for people with depression. This project will develop an online cognitive behavioral intervention program (including both an online platform and a smartphone application) for Hong Kong people with depression. Blended mode will be delivered service, which include 8-week online program, 2 face-to-face sessions and 2 telephone follow-ups by a clinical psychologist. The program will be evaluated in its effectiveness in reducing depressive and anxiety symptoms, psychological distress, negative thoughts and negative emotions and increasing positive thoughts and positive emotions.

Inclusion Criteria:

• Hong Kong resident
• Has mild to moderate depressive symptoms
• No suicidal risk in the past 3 months
• Receive no face-to-face counselling since program commencement
• Has access to a computer/smartphone with internet access
• Has a valid email address

Exclusion criteria:

• Has severe or no depressive symptoms
• Has suicidal risk in the past 3 months
• Currently receiving other psychological treatment
• Suffer from severe psychiatric conditions, such as bipolar disorder or schizophrenia
• Has no computer or smartphone with internet access
• Has no valid email address