Dependency formula is the clinical manifestation of Asperger’s syndrome. Diagnosis of Asperger’s syndrome (known as Asperger’s disorder) is defined in the DSM-IV as follows: 1. There is a social impairment that exhibits at least two of the following to be judged qualitatively (1) Significant deficits in the ability to use some nonverbal behaviors for social interaction, such as gaze to gaze, facial expressions, body postures, and gestures. (2) Inability to establish age-appropriate and appropriate partnerships. (3) Lack of desire to spontaneously seek out others to share pleasures, preferences, or successes. (4) Lack of communicative and affective reciprocal behaviors. (2) Stubborn adherence to repetitive and unchanging patterns in behaviors, preferences, and activities, exhibiting at least one of the following (1) Always in one or more unchanging and limited patterns of interest that are abnormal in their intensity and concentration of interest. (2) Significantly stubborn adherence to some particular, nonsensical procedures and rituals. (3) Repetitive and unchanging maintenance of some special habits that one has formed. (4) Prolonged attention to parts of objects. (3) The above disorder seriously impairs the child’s functioning in social interaction, occupation, or other important areas. 4. There is no clinically significant overall delay in language development (e.g., speaking single words by age 2 and using conversational phrases by age 3). 5. There is no clinically significant delay in cognitive development, self-care, adaptive behavior (except for socialization), or curiosity about the external environment during childhood. 6. No other clear diagnostic criteria for pervasive developmental delay or schizophrenia were met.