Development timeline.
Age-based developmental milestones. Based on Denver II and ASQ-3.
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Evidence: Developmental milestones are based on Denver II (Frankenburg et al., 1992) and ASQ-3 (Squires & Bricker, 2009). Early identification of developmental delays improves outcomes through early intervention (Shonkoff & Phillips, 2000). This tool does not replace professional developmental screening.
Frankenburg, W.K. et al. (1992). Denver II. Denver Developmental Materials. · Squires, J. & Bricker, D. (2009). ASQ-3. Brookes. · Shonkoff, J. & Phillips, D. (2000). From Neurons to Neighborhoods. NAP.
This tool is for guidance and educational purposes. It does not replace assessment by a qualified professional.