The document discusses several concepts from Gestalt psychology and cognitivism. Gestalt psychology emerged in the early 20th century and focused on how the whole is greater than the sum of its parts in perception. It explored principles like emergence, reification, and invariance. Cognitivism later replaced behaviourism as the dominant paradigm in psychology by opening the "black box" of the mind and exploring internal mental processes like thinking and problem-solving. Key cognitive theorists discussed include Piaget, Bruner, Ausubel, and Gagné.