عنوان مقاله [English]
The purpose of the present study was don meta-study about research done in relation to the theft during the years 85 to 96 in Tehran metropolis. 10 The study identified theft, , The results part of the meta-theory and meta-method showed that the researches carried out on the subject of the research except are at a rather favorable level and also, the results of the meta-analysis section showed that the effect size of the combined effect of r in the factors affecting Occurrence of theft in the fixed model, 0.438 and in the randomized model, 0.414 Which, according to Cohen's criterion, had a large amount of effect size. But in a separate survey, in the area of effective factors in the Occurrence of theft effect size of individual factors was more than family and cultural-social factors. Test results, Egger,s linear regression, Fail- safe N, Duval and Tweedie's trim-and fill and Funnel plot Indicating no Publication bias of the meta-analysis sample. Due to heterogeneity in studies, modulator analysis was carried out which indicates the moderating effect of the area of factors affecting the Occurrence of theft, the year was carried out and the sampling method.