After several years of research, Richard Mayer, an American educational psychologist, recommends the following guidelines to enhance multimedia for the purpose of education and communication.

1 Coherence Principle

Use only the information that the learner needs.

2 Signaling Principle

Show exactly what to pay attention to.

3 Redundancy Principle

Humans learn best with narration and graphics, as opposed to narration, graphics, and text.

4 Spatial Contiguity Principle

Relevant text and visuals should be physically close together.

5 Temporal Contiguity Principle

Corresponding words and visuals are presented together, instead of in consecutive order.

6 Segmenting Principle

Information is presented in segments, rather than one long continuous stream.

7 Pre-Training Principle

Humans learn more efficiently if they already know some of the basics. 

8 Modality Principle

Humans learn best from visuals and spoken words than from visuals and printed words.

9 Multimedia Principle

10 Personalization Principle

Humans learn best from a more informal, conversational voice than an overly formal voice.

11 Voice Principle

Humans learn best from a human voice than a computer voice

12 Image Principle

Humans do not necessarily learn better from a talking head video.