Answer :
Cognitive psychology and neuroscience emerged gradually, as psychology and its existing strands were not sufficient to describe, explain and even satisfactorily resolve aspects and problems related to human behavior. With that, we can say that cognitive psychology and neuroscience emerged with the advancement and evolution of psychology that was influenced by the need that society presented.
Cognitive psychology and neuroscience allow us to study and understand the mental capacities of human beings and their relationship with the brain and its functioning. Without these two sciences, this understanding would be impossible and we would not understand the human being efficiently.