The Grow Together, Thrive Together (G2T2) intervention is a brief, online, self-directed, writing-based relationship intervention for emerging adult-caregiver dyads. Each member of the dyad independently completes three guided writing sessions over approximately nine weeks. Sessions include brief questionnaires assessing recent conflict frequency and distress, a short instructional video introducing a neutral, third-party perspective on conflict, and a brief set of multiple-choice learning check questions to assess understanding of the conflict reappraisal strategy. Participants then complete structured writing prompts that encourage conflict reappraisal, reflection on barriers to strategy use, and planning for applying the strategy in future interactions. Participants also receive brief email or SMS reminders between sessions to encourage practice of the strategy. All study procedures are delivered remotely via secure online platforms.

Grow Together, Thrive Together (G2T2) is a brief, online, writing-based relationship intervention designed for emerging adult-caregiver dyads. The intervention is grounded in conflict reappraisal and third-party perspective-taking and aims to reduce negative reciprocity during disagreements by helping participants reinterpret conflicts from a neutral, outside-observer perspective. Across sessions, participants are guided through structured writing exercises that focus on describing recent disagreements factually, considering alternative interpretations of the conflict, identifying barriers to applying the strategy, and planning how to use the reappraisal approach in future interactions. Instructional video content and brief learning check questions support understanding of the core strategy. The intervention is designed to be low-intensity, scalable, and culturally responsive, and is adapted from an evidence-informed writing intervention previously tested in other relational contexts.

Recruitment feasibility will be assessed by the proportion of the target sample of emerging adult-caregiver dyads successfully recruited during the planned recruitment period (58 weeks from March 20 2026 to May 1 2027). Feasibility will be evaluated against a predefined success criterion of recruiting at least 70% of the target sample.

Percentage of caregivers meeting socioeconomic criteria, defined as having a household income below the Toronto median and/or a high school education or less. Feasibility will be evaluated against a predefined benchmark of ≥30% of caregivers meeting these criteria.

Participant retention will be assessed as the proportion of enrolled emerging adult-caregiver dyads who complete the post-intervention assessment one week after the final writing session. Feasibility will be evaluated against a predefined success criterion of at least 75% dyad retention.

Intervention adherence will be assessed as the proportion of emerging adult-caregiver dyads who complete at least two of the three online writing sessions. Feasibility will be evaluated against a predefined success criterion of at least 75% adherence.

Intervention uptake will be assessed as the proportion of emerging adult-caregiver dyads reporting use of the conflict reappraisal strategy since their previous intervention session. Feasibility will be evaluated against a predefined success criterion of at least 80% uptake.

Relationship quality will be assessed using the Parental Environment Questionnaire (PEQ; caregiver and emerging adult versions), which includes five subscales: conflict, involvement, regard for parent, regard for child, and structure. Exploratory analyses will examine mean change from baseline to one week post-intervention.