The Marketing Scales Handbook is indispensible in identifying how constructs have been measured and the support for a measure's validity and reliability. I have used it since the beginning as a resource in my doctoral seminar and as an aid to my own research. An electronic version will make it even more accessible to researchers in Marketing and affiliated fields.
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.