A survey of attachment theories and cross-cultural child-rearing practices. Child development is the changes that occur from birth; physically, socially and cognitively. From the moment an infant is born, the environment, people, and culture around them will influence the child and their relationships. It provides a “solid foundation on which all other relationships develop.” The idea is that the success of all relationships depends on the success of the first, namely the bond between the child and his mother or caregiver. (Brodie, 2008) Attachment is defined as “the emotional bond that a person or animal forms between itself and another”. (Bowlby 1951.) Attachment is one of the essential factors for healthy emotional, biological and psychological development in humans. The type of attachment formed plays an important role in emotional development. Many influential theorists, such as John Bowlby, Mary Ainsworth, and Jean Piaget, among others, have demonstrated this. Socialization refers to “the transmission from one generation to another of a society's norms of belief and behavior.” Socialization processes help stimulate cognitive development – ​​Vygotsky, Rogoff, etc. demonstrated how adult participation helps develop cognitive skills through scaffolding or guided participation. » (Schaffer 1998) Societies will transfer their culture from one generation to another and this will begin from the moment a child is born and placed in their first social group being their family. In this essay I will explore the different examinations, thoughts and feelings that have led us to understand the connections important to our understanding of ch...... middle of paper ......mental responses when one's baby has been threatened or when the experiment took the baby several times a day to be artificially fed, he would climb on it to suffocate him and then be brushed off by his mother as she brushed off a fly. When the baby persisted, the mother would crush the baby's face or body to the floor of the cage with her hand or foot, either looking at the baby or staring into the open space… (Harlow and Harlow, 1961 .) The other three mothers themselves, raised without a real mother, were also completely inadequate as mothers to their first child. These data, along with a comparison of the offspring of normal ape mothers who had offspring, as Raymond and Harlow 1966 suggest that "human firstborns are not the only ones to have more than their share of problems.” (Raymond and Harlow, 1966)