The procrastination scale is a 20 item questionnaire.
Items are scored on a 1-5 scale, with the total scale score calculated as a sum of the items.
Some items will be reversed for example, a score of 1 will change to a score of 5.
Lay, C. (1986). At last, my research article on procrastination. Journal of Research in Personality, 20, 474-495.