The development and psychometric evaluation of nurses' knowledge, attitude and practice regarding elder abuse.

Purpose: The purpose of this study was to develop and psychometrically evaluate a tool to measure nurses' knowledge of, attitude toward and practice regarding the elder abuse phenomenon. Design/methodology/approach: This study is methodological research that was conducted in two stages. In the first stage, the available tools related to knowledge, attitude and practice regarding elder abuse were identified through an extensive review of theoretical principles, previous research and related articles. The initial items were extracted and categorized. In the second stage, the psychometric properties of the tool were examined by assessing face validity, content validity, construct validity, internal consistency and stability. Four hundred nurses working in the hospitals of Shahid Beheshti University of Medical Sciences were selected to determine the validity of the structure. Findings: The initial tool consisted of 114 items extracted, 34 of which were removed according to the experts' opinions. The face validity of the 80-item questionnaire was then examined. The number of the items was reduced to 74 after measuring the face validity. After the qualitative measurement of the content validity, three items were eliminated. After measuring the content validity using a quantitative approach, 8 other items were removed and 63 items remained. According to the content validity index, 1 more item was removed, reducing the number to 62. The construct validity approved three dimensions of knowledge, attitude and practice. Cronbach's alpha coefficient was calculated to be 0.84. The stability was also confirmed through test–retest with a value of 0.85 for the whole scale. Originality/value: The tool developed for assessing nurses' knowledge, attitude and practice regarding elder abuse has acceptable dependability and credibility. Given the advantages of this tool, including the simplicity and fluency of sentences, and the comprehensive evaluation of nurses' knowledge, attitude and practice regarding elder abuse, it is recommended to use this tool in relevant future studies. [ABSTRACT FROM AUTHOR]