in general, productivity is gaining maximum profit from manpower, equipments, time, place, and son on in order to enhance social welfare. without doubt, promoting productivity at individual, group, and organizational levels depends on different factors. this research is about to find a model to recognize influencing factors on workers’ productivity in the mst group, and to show relationships am...

background: childhood aggression, particularly in preschoolers, is one of the most common behavioral problems throughout the world. therefore, it is important to identify the predictors of this problem. this study was conducted to determine the predictors of physical and verbal aggression in preschoolers. methods: this descriptive cross-sectional study was conducted on preschoolers in rasht in ...