If lying is defined as giving a false statement for personal gain, then lying is only one of several causes for children not giving an accurate account of events. Other reasons include an immature brain, a congenitally acquired defect in the central nervous system, or the presence of an emotional disturbance such as psychosis or hysteria. The desire of a child to please others -- that is, parents, therapists, or lawyers -- may also result in an invalid statement. These factors and motivation should be considered in trying to interpret a youngster's statement. 52 references. (Author abstract)