Separation anxiety disorder is a persistent, intense, and developmentally inappropriate fear of separation from a major attachment figure (usually the mother). (merckmanuals.com)
Impulsive, with not much ability to control himself, he had a hard time following verbal instruction and often seemed to pay no attention to what was being requested of him.He is very attached to his father and me and was experiencing extreme fear of separation into kindergarten. (youcaring.com)
While a 2 - year - old is likely to throw temper tantrums and cling to parents in fear of separation, a few years later they have usually learned to handle anger more constructively and successfully play in groups. (care.com)