Ecological Momentary Intervention for Stroke Caregivers' Psychological Support

Inclusion Criteria: * Primary family caregiver of stroke patient (modified Barthel Index \[mBI\] \<15; usually represent moderate disability) * Able to read and communicate in Chinese * Aged ≥18 * Able to use mobile phone text messaging function * PHQ-9 ranged from 5 to 19 Exclusion Criteria: * Professional medical personnel and professional carer * Has provided care for \<1 month prior to recruitment * Has diagnosis of psychiatric disease or is currently taking psychotropic drug * PHQ-9 ≥ 20 (i.e., severe depressive symptom) * Currently participating in any type of psychological intervention (e.g., CBT)