critical appraisal of the validity and reliability of the quantitative studies published in iranian nursing journals

background: despite progression of knowledge of nursing researcher about importance of psychometric principles of instruments of studies but it seems that this subject is not used correctly in nursing studies. this study is designed to critically assess the validity and reliability of instruments applied in studies published in iranian nursing journals methods: this study is a critical review of literature that is used the morse critical appraisal method. therefore all of studies of five iranian nursing journals that are published in1391 was selected and assessed with a researcher made checklist. results: in 197 assessed articles 280 instruments consist of 245(87.5%) questionnaire and 35(12.5%) checklist was used. in 60% of instruments the validity and reliability of original copy of instrument, in 42.9% the method for confirmation of validity and in 31.8% the method for confirmation of reliability not mentioned. conclusions: the results of this study suggest that the quality of confirming validity and reliability of instruments applied in nursing studies is poor therefore this result can be a stimulator factor for nursing researcher to equip themselves with knowledge of psychometric to enhance and facilitate the evidence based practice.