Psychology, being the scientific study of the human mind and its functions, is becoming a more prominent study in younger ages. In child psychology, there are many factors that contribute to the cognitive development of children, adolescents, and young adults. These factors can be categorized into three main topics: environmental factors and how it changes the neurological system, risks of social behavior due to the different mental states, and hormonal changes adding to psychological imbalance. Lifestyle, social relationships, childhood experiences, family life, and what they take into their mind can have multiple effects on their newly forming mental health patterns. Adolescents need constant approval, require love and attention, and a sense of want or belonging to feel needed. In recent research, half of all mental illnesses begin by the age of fourteen, and studies investigate their cognitive, environmental, and genetic factors. Youth and adolescent Psychology is one of the most commonly studied types of psychology today. This form of psychology covers every child. It includes behavior problems, social skills, mental and emotional well-being, and development. Child psychology is also stated to be the application of psychological techniques to children which involves carrying out research on children's mental states and development. The development of the child both physically, mentally, and emotionally, with the help of a parent, allows the identification of helpful information for any evolving challenges in the child’s behavior. Research indicates that the performance of children at a given age is changeable from domain to a domain such as the understanding of social, mathematical, and spatial concepts that it is impossible to place the child in a single stage. This level involves processes defining the volume and kind of information the individual child can process. For example, reflexes arise before birth and are still present in newborns. Sometimes, prenatal development and birth complications may also be connected to neurodevelopmental disorders. Young children react to various motivations in various ways (Damon & Lerner, 2006). For example, infants’ sight blurry in early stages improves over time. Habituation is applied in discovering perceptual systems.