Objective: To study the effect of early intervention on psychosocial development of children in single child family. Method:30 babies were enrolled as intervention group from they were fetus. Another 37 were enrolled as control group. The former received intervention under the Guide of Different Stages from 0 to 6 years old. Achenbach Children Behavior Checklist (CBCL) and Binet Intelligent Test were used to assess the results.Results:The rate of behavior group was 6.7%, significantly lower than that of the control group (13.5%) and Chinese norm (14.2%). The average IQ of the intervention group was significantly higher than control. But there was no significant difference in Social Adaptability between the two groups. Conclusion:Early education and intervention can improve psychosocial development children in single child family.

Objective:To establish a preliminary diagnostic criteria of pathological internet use for field test in China.Methods:Through searching common "pathological internet use" diagnostic criteria or screen criteria in literature,a diagnostic criteria items pool and a preliminary diagnostic criteria of "pathological internet use" were established .According to the diagnostic criteria,each 2 senior professional psychiatrists in turn interviewed 79 patients and their parents,and then made diagnosis respectively. In addiction,44 high school students were each evaluated by one psychiatrist.The definite diagnosis was made when 2 evaluators make the same diagnosis for one patient.Result:In 123 patients,54 were pathological internet use.For diagnosis,the value of kappa for inter-rater reliability was 0.812( P<0.001).In the 12 criteria items,2 for poor inter-rater reliability and 4 for little contribution to diagnosis were eliminated.In the reserved 6 items,if 4 items(or more)were positive,the diagnostic sensitivity was 78.9% and specificity was 95.3%.Functional impairment criteria were made strictly.In the patients who were made the definite diagnosis,90.7% had duration of illness above 3 months,and 77.7% above 6 months.Conclusion:The preliminary diagnostic criteria of pathological internet use after revised includes 6 symptom criteria,3 functional impairment criteria,duration of illness and exclusive criteria.The criteria proposed is with high consistency on evaluations made by psychiatric raters,and with operational convenience.The criteria,after further revised,may fit the clinical application.