The personal and social development of children is mainly considered under the influence of parental upbringing and other environmental determinants. It was not until Johnson and Myklebust's work that difficulties in this area were seen as learning difficulties that had constitutional origins. Nevertheless it is extremely important that such difficulties are diagnosed and treated as unskilled children who are developed into unskilled adults. The chapter shows that many children are affected in terms of their social skills. One model of such learning difficulties is given by Myklebust and Badian. They point to the fact that many more boys than girls have difficulty with social perception and it is often associated with mathematical difficulty. The same psychological processes underlie a child's performance in both the private and interpersonal situations. Children having difficulties with social perception are described as being poor in independent activities, poor in judging people's emotions and attitudes, insensitive in social situations and doing and saying inappropriate things.