The reduction in the level of comprehension of students today has spurred on neuroscientists to initiate research in to the use of color and visuals to stimulate the learning process. It has been found that reading in black and white sometimes leads to the shut down of various parts of the brain. This has resulted in students getting bored by reading, and hence lowers their comprehension levels.
It is believed that color and images stimulate and activate the brain, and so students tend to find it more exciting. As a result, they are more interested and respond in a more positive manner. As they absorb what they see, their power of comprehension also improves.