Many of humans are concerned about their mental power and general psychological health. This is because some habits related to daily activities are causing developmental delays in the brain. This passage will inform you about the general concept of mental improvement as well as the recommendations to keep in mind in order to own much greater brain power. Cognitive development has always been subject to scientific discussions in various communities. As a concept, it has historically been explained by dividing out humans` overall life into sections which produce more vivid pictures describing the stages of intellectual growth . Jean Piaget is a good example of scientists whose works are still in use of several branches including psychology and education. Having determined key assumptions before carrying out experiments, he concluded upon 4 important stages and attached distinctive characteristics for each of them. When analyzing his and other scientists` thoughts around this topic, I u...