Bowlby's maternal deprivation theory suggests that prolonged separation (deprivation) leads to psychological, emotional, intellectual damage. (sometimes physical too),
Affectionless Psychopathyis a characteristic of an individual, whom does not feel empathy or guilt for their actions.
Emotional development affect of MD = Affectionless psychopathy
Intellectual development is affected by MD, due to a lack of a secure base for exploration.
Goldfarb study supports intellectual development effects due to MDH. (average IQ of children adopted after critical period=65 Children adopted afterwards = 96)
An explanation for social development issues, is impacted IWM.