As we know human beings have a typical life, which consists of successive phases of growth and each stage is categorized by a distinct set of behavioral, psychological, and physical features. The life of human beings is characterized by different stages such as infancy, childhood, youth, adulthood, and old age with several psychological processes.

Human Psychology is the scientific study of mind and human behavior with an understanding of several mental processes such as motives, thoughts, and feelings. It is also an academic discipline of huge scope and crosses the boundaries between social and natural sciences. Human psychology is also a study of understanding human behavior and brain functions. The field of human psychology is considered as a Hub Science with strong connections to the education, social sciences, and medical sciences.

Human psychology is also the study of explaining and describing the changes in human mental conditions, behavioral capabilities, emotions, and working over the whole life span between the fetus and old age. Most scientific studies on human development have focused on the period between birth via early adolescence due to the magnitude and rapidity of the psychological changes observed throughout the stages of life.