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  Social Presence:  Social presence is referred to the degree that of being present in the communication and being perceived as a real person behind the screen. Also, it can be described as the sense of being with someone who is somewhere else. It is about the ability to be in relationships on purpose. Social presence is important, especially in computer-based lessons, since the probability of isolation is extremely high. Transactional Presence:   Transactional presence is a sensation of being connected and being in interaction with others in an educational setting. Especially in the online education context cameras and microphones are turned off, causing people to be unable to interact. In order for communication to be provided correctly, people must be in contact with and connected with others. Therefore, interaction presence is important. Cognitive Presence:  In order for students to achieve a successful learning process, they should be able to share ideas wi...

                 Mayer's Cognitive Theory of Multimedia Learning Firstly, let's get to know about the multimedia principle. The multimedia principle states that “people learn more deeply from words and pictures than from words alone”.  However, simply adding words to pictures is not an effective way to achieve multimedia learning.  The goal is to instructional media in the light of how the human mind works.  This is the basis for Mayer’s cognitive theory of multimedia learning.  This theory proposes three main assumptions when it comes to learning with multimedia: There are two separate channels known as auditory and visual for processing information. And, it is also referred to as Dual-coding Theory, Each channel has a limited capacity, Learning is an active process of filtering, selecting, organizing, and integrating information based upon prior knowledge. Humans can only process a finite amount of information in a chan...