Multimedia
Multimedia is an essential part of online courses. Multimedia is content that utilizes a combination of different content forms such as text, audio, images, animations, videos, and interactive materials.
The cognitive theory of multimedia learning developed by E. Mayer (Mayer & Moreno, 2003) proposes three assumptions about human cognition when learning with multimedia:
There are two separate channels for visual/pictorial and auditory/verbal processing, also known as dual channels
Humans can only process a finite amount of information in each channel at a time
Learning is an active process of selecting, organizing, and integrating information based on prior knowledge