The author analyzed the essence of concept "performance stability musicians in concert and stage activities". It was found that it does not reflect error-free sound realization author's musical text, but repetition its previous realization, even with admission a large number same mistakes. expediency identifying modern science infallibility performing any professional activity subjects meaning ...

the study of individual and social factors affecting the tendency to verbal violence among high school boy’s students in bushehr city. the methodology of this study was survey and used a questionnaire. population of this study was all high school boys’ students in the city of bushehr and 400 persons determined as the sample size with using lin table. the method of sampling was a multi-stage str...