The evolution of thought across the lifespan is referred to as cognitive development. Cognitive development in children is the process by which they progressively collect the capacity to reason, think, understand, and remember as they grow. Learning to solve problems, language development, reasoning and thinking, world understanding, memory development, social cognition, attention and concentration are some of the major turning points in this process.
With the adolescence period, the child begins to acquire new achievements on top of the achievements in the concrete operations period, and this enables the adolescent to reach a higher level of balance. The most important difference in the thought processes of an adolescent and a child is that the child's thinking is more closely tied to concrete reality.