This document provides notes from the first lecture of an infant and early childhood development course. It discusses several key topics:
1. Theories aim to explain phenomena through predictions and explanations that can be proven or disproven. Theories guide research and understanding but can also limit thinking if not questioned.
2. There is a difference between describing a theory versus explaining the underlying reasons and mechanisms.
3. While textbooks present development as occurring in distinct stages, the professor notes that development is influenced by situations and can involve more gradual changes.
4. A qualitative shift occurs in how newborn babies circulate blood after birth. Students are reminded to think critically about theories.