The Marketing Scales Handbook is indispensable 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.
Freedom from Coercion
This five-item, six-point Likert-type scale is used in measuring the degree to which a person describes his/her engagement in an activity as being without coercion or obligation. The activity investigated by Unger (1981; Unger and Kernan 1983) was subjective leisure. In the study by Guiry, Mägi, and Lutz (2006) the activity was recreational shopping.