Teenagers in the phase of formation of self-identity develop depression when they cannot understand continuously what is going on around them from their own
point of view. children. Then, how about depression of children under age 5, who are in the phase of survival? When young children get stressed by their survival
being threatened, they may cry and scream loudly. When their parents cuddle and feed them in a safe environment, they feel comfortable and safe. However, when
there is no one who takes care of them and they are neglected, they develop anxiety and fear and may develop depression.
When a baby who was happily watching the mobile hanging on the ceiling suddenly begins to cry out loud or a baby who used to smile at the sight of the
mother doesn't smile at the mother these days, it indicates that the baby is under great stress. Some babies who are suffering from asperger's disorder or autistic
spectrum condition are not good or effective at expressing themselves even when they feel problems or discomfort. Boys have problems in perception and girls
in memory of emotions. The mind of babies as well as that of adults stops functioning in the right way when their survival is threatened. When the mind stops
functioning properly, they begin to have problems in psychology and their cognitive development slows down. Depression can develop in every phase of
psychological development when the goal of each phase cannot be achieved properly. When babies feel that safe survival and healthy growth are guaranteed
in the current environment, they don't develop psychological problems.