Meta-analysis of the Biological, Cognitive and Psycho-social Characteristics of Relative Parents and Irrelative Parents

The aim of the current meta-analysis was to determine the biological, cognitive and psychosocial characteristics of relative parents and irrelative parents that having more than one exceptional child in Iran. Study procedure was meta-analysis. This research specifies the effect size of the biological, cognitive and psychosocial characteristics of relative parents and irrelative parents that having more than one exceptional child by using meta-analysis technique and integrating the results of different studies. On the whole, 9 methodologically acceptable studies were selected and met analysis was done on them. Sources of data search were scientific documents in universities, noor specialized magazines database (Normans), Scientific Information Database (SID) and Iranian Research Institute for Information Science and Technology (IRANDOC). The research tool was meta-analysis checklist. Finding of research showed that the rate of effect size of biological, cognitive and psychosocial characteristics of relative parents and irrelative parents that having more than one exceptional child in Iran was high. Therefore, it seems that the education programs before of marriage can be used as a method to prevent the relative marriage. On the other hand, planning to prevent of the impairments of biological, cognitive and psychosocial characteristics of relative parents that having more than one exceptional child has particular importance.