Marginal babbling is defined as the long series of sounds that infants produce just before they begin to produce canonical babbling . Marginal babbling, which is a kind of sound production is typical around 5 and 6 months of age.
Maria Montessori (1870-1952) refers to an Italian educator who developed a popular method of educating young children in which students were encouraged to be self -directed in their explorations of their environments.
Marital skew refers to a situation in which the psychological disturbance of one parent dominates the family 's interactions . An unreal situation for family members is created so that the family can deal with one member's disturbance.