**Table 1.** *Cont.*

### **5. Contribution to the Field of Early Child Development**

This narrative review highlights the pivotal studies supporting the role of environmental factors and interaction factors influencing child development, developmental potential, and functioning trajectories globally (Table 1). In addition, the selected studies show the gaps related to the lack of comprehensive and collaborative frameworks of assessment and service provision in early child development across sectors. Hence, guided by the ICF-CY, we propose an intervention framework of child-environment interactions to optimize children's developmental functioning and trajectories at a population level (Figure 1). The proposed interactional framework can guide the identification of key developmental indicators for assessments, interventions, and evaluations. Moreover, the universal adoption of the ICF-CY and pediatric ICF-based tools as guiding frameworks for comprehensive assessment of children's development and optimal functioning across health and education, promotes professional training on integrated assessments, evaluations, and interventions, fosters collaborative service provision across sectors, and facilitate

communication among multiple stakeholders [6,37–39]. Systematic efforts to use a common language in assessments and interventions across sectors will facilitate continuity of care, coordination, organization, and monitoring of programs throughout the children's developmental trajectories.
