Background: Validation of an instrument consist of three main types: content. criterion and construct. Content validity needs to be determined in order for an instrument to be acceptable for use. validity establishes the fact that an instrument measures exactly what it proposes to measure. https://www.bekindtopets.com/deal-alert-NHL-Winnipeg-Jets-Distressed-iPhone-13-Pro-Max-MagSafe-Case-p96268-great-save/