What is cognitive development?

Whenever I hear the word cognitive I immediately think of Jean Piaget. Piaget created a theory that explains how children come to understand the world and create internal cognitive concepts about the world through direct interactions with the environment. Cognition refers to thinking, reasoning abilities, memory skills, decision making, problem solving, and other aspects of intellectual functioning. In middle childhood a child will increase their ability in logical thought, and improvement in memory and learning strategies, and the ability to learn through dialogue with others.