Arnold Gesell -

He was among the first to use motion-picture cameras to record and analyze child behavior.

His groundbreaking research established that children progress through predictable, orderly sequences of growth determined primarily by genetics and biology. 🔬 Gesell's Method of Observation arnold gesell

Gesell's theory rests on several foundational laws of biological growth: The Enduring Contributions of Arnold Gesell - NAEYC He was among the first to use motion-picture