Theory-Based Parenting Intervention for Preschool Children's Health Behaviors

The goal of this study is to test whether a 4-week online program can help parents better support health behaviors of their preschool children (aged 3-6 years). Preschool children often rely on their parents to build health behaviors, such as being physically active, limiting screen time, drinking fewer sugar-sweetened beverages, and washing their hands regularly. The main questions this study aims to answer are: Does the program improve parents' motivation, planning, and habits related to supporting their children's health behaviors? Do parents who receive the program provide more support for their children? Do preschool children in the program show improvements in health behaviors? Can improvements explained by changes in parents' psychological factors? Researchers will compare parents who receive the program immediately to parents in a waitlist control group. Participants will: Complete online questionnaires before the program, after the program, and one month later (Intervention group only). Complete eight online sessions over four weeks using a mobile program.