LINE@ Online Platform Intervention

Using digital learning materials covering family functioning, substance dependence severity, motivation for change, and emotional health management.

1.Assessment of family dynamics and functioning using using validated scales FAMILY APGAR (questionnaire). 2.The score ranges from 0 to 10, with higher scores indicating better family functioning.

1.Evaluation of the severity of substance dependence among participants using validated scales The Severity of Dependence Scale (questionnaire). 2.The score ranges from 0 to 15, with higher scores indicating a greater level of substance dependence in the participant.

1.Measurement of participants' motivation to change their substance use using validated scales University of Rhode Island Change Assessment (questionnaire). 2.The score ranges from 2 to 10, with higher scores indicating a greater severity of addictive behaviors and a higher level of motivation to change in the participant's clinical course.

1.Assessment of emotional health management skills through using validated scales Brief Symptom Rating Scale (questionnaire). 2.The score ranges from 0 to 20, with higher scores indicating a greater level of emotional distress.

1.Survey on illegal drug use in the past 1 month using validated scales Drug Abuse Screening Test (questionnaire). 2.The score ranges from 0 to 10, with higher scores indicating a higher risk level of illegal drug use.

1.Participants' evaluation of the usability and effectiveness of the LINE@ platform using validated scales System usability scale (questionnaire). 2.The score ranges from 0 to 100, with higher scores indicating a higher evaluation of the educational material by the participants.