Intervention(s)
we recruited ten schools in a County in Hunan Province to participate in our experiment. Our baseline sample consists of over 3,500 fourth- and fifth-grade students, including 2,505 non-left-behind children from 78 classes in 10 public primary schools. Our interventions target parents of these 2,552 non-left-behind children. We also analyze spillover effects on left-behind children.
We use a two-level cross-randomization design. First, within each school-by-grade stratum, we randomly assigned classes to two parental guidance treatment groups or the control group. Second, within each class, we randomly assigned parents to one of three information nudge treatments or to a control. This design allows us to estimate the effects of each parental guidance treatment, each information treatment, and their interactions.
We design two parental guidance interventions: (i) \textit{parenting guidebook (PG)}. Parents received a guidebook on how to tackle parenting challenges. This guidebook, adapted from UNICEF's parenting education guidelines and tailored to the Chinese cultural context, includes practical examples related to ten key issues identified by local parents in a preliminary survey. (ii) \textit{AI-assisted parenting chatbot (AIPC)}. Parents were provided with an account to access our designed app, which is based on a trained large language model (Deepseek). This AI chatbot allows parents to acquire real-time, personalized advice for daily parenting challenges. The chatbot was trained using the same material as the PG intervention, enabling it to offer suggestions in line with UNICEF's guidelines. We assigned 26 classes to PG treatment groups and 26 classes to AIPC treatment groups. The remaining 26 classes were assigned as control classes (between-class controls) with no parenting guidance.
We then cross-randomized students across the three parental guidance
intervention arms and the information treatment arm. Each student (and their parents) was randomly assigned to one of three information treatment groups or to a control group: (i) \textit{Children's expressed needs}: Parents received information about children's expressed preferences for parental engagement, derived from the baseline survey. (ii) \textit{Benefits of supportive parenting}: Parents received information on the positive effects of patient and egalitarian parenting practices. (iii) \textit{Perspective-taking reflection}: Parents received a message encouraging recalling their own negative childhood experiences, such as corporal punishment. (iv) \textit{Control}: Parents in the control group received no information messages. We refer to this group as \textit{within-class controls}. All information was delivered to parents twice a month via SMS messages.