There was done a comparative analysis of social factors role in the pathogenesis of the classic autistic disorder (DSM-IV-TR 299.00) and functional atypical autism (DSM-IV-TR 299.80). It's known that nowadays the incidences of children's autism increased. and the reasons of autism growth in children population are not clarified.

2 groups of children aged from 3 to 7 years, 20 patients in the group with the autistic disorder and 20 patients with functional atypical autism without signs of organic lesions of the central nervous system.

The social, demographic, psychopathological, clinical, neuropsychological (Luria-90), nonparametric statistical methods, anamnesis.

A statistically significant difference of social and demographic indicators in studied groups. the children with functional autism are characterized by significant functional difference in the parents age (father older mother 16 ± 3,2 years) (p < 0.001), technical education of parents (p < 0.001), profession of father (computer technology, programming) (p < 0,05), a technological saturation of family environment (computers, telephones, television, etc.) (p < 0.05), emotional distancing of parents (p < 0.001), mediated relationship “parent-child” through a nanny (p < 0.05). There were statistically significant differences during neuropsychological testing. the children with functional autism opposed to children with early childhood autism had deviations of kinesthetic (p < 0.001), dynamic (p < 0.05), constructive praxis (p < 0.02), mechanical memory (p < 0.01), delayed speech development (communicative function of speech) (p < 0.05).

Revealed factors should be considered as additional differential diagnostic and prognostic criteria's in diagnostic and corrective therapeutic measures.