Maternal Deprivation: The absence or loss of a mother, which can lead to negative effects on development and behavior in children.
Contact Comfort:A term coined by Harlow referring to the physical and emotional comfort that an infant receives from being in physical contact with its mother or caregiver.
Critical Periods: Specific time frames during an organism's life during which it is sensitive to environmental influences or stimuli, and thus capable of undergoing developmental changes.