A three-item, nine-point summated ratings scale is used to measure a person's perception of the relative difficulty involved in making a choice decision using an electronic decision aid versus a choice made with the same information printed on paper but with the brands listed in random order.
As a researcher, it's important to use validated scales to ensure reliability and improve interpretation of research results. The Marketing Scales database provides an easy, unified source to find and reference scales, including information on reliability and validity.
