1: Lifespan Development Last updated Apr 29, 2022 Save as PDF Licensing 1.1: Why It Matters- Lifespan Development Page ID140821 ( \newcommand{\kernel}{\mathrm{null}\,}\) 1.1: Why It Matters- Lifespan Development1.2: Introduction to Human Development1.3: Defining Human Development1.4: Periods of Human Development1.5: Introduction to the Lifespan Perspective1.6: The Lifespan Perspective