When we talk about abnormal behaviour,somebody will wonder,”How can anybody tell what is abnormal behaviour”? Abnormal,refers to any behavior that is not typical. In the practice of psychology it has further come to mean mental illness.The causes of abnormal behaviour are complex and they are always interconnection.The basic causes of abnormal behaviour can be considered three aspects: biological fault, childhood’s habitation,drug.
The first cause of abnormal behavior is biological fault.DNA acts as the very important role in the process of human’s fetation.chromosomal aberration will affact directly baby’s health,become a morbid people.A undound people lead to mental illness, and then he always do some abnormal behaviour. The imputation that a lots of undound people came into the world are the mutation of gene and the kin of spouses. Today,people build the law to prohibit that two people who are relative get marry,avoid undound baby is borned.while the natural problem,like the mutation of gene.The problem is uncontroled under modern scient technology.”There is one undound baby among 400 new born baby in the world”(World Health Organization,2005 ). Biological disorder also includes the disease due to products of microbes or toxins.People live surround a poisonous environment, or often stay in a strong rediate area,the body will get mutation,long time later,they will do some strange,abnormal behaviour.
Another cause of abnormal behaviour is childhood’s habitation. Abnormal development has often been observed in infants deprived of adequate maternal care as consequences of either separation from the mother and placement in an institution or lack of adequate mothering in the house. In an institution as compared with an ordinary home, there is likely to be less mothering contact, less intellectual, emotional and social stimulation and a lack of encouragement and help in positive learning.” In a study of 38...