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.
Choice Freedom
The belief that a choice one is making is self-determined rather than being externally imposed is measured in this scale with five, nine-point Likert-type items. Botti and McGill (2011) referred to the measure as personal causality.