The Prosocialness Scale for Adults measures an individuals prosocial behavior. There are 16 items. For each prosocialness item, participants indicate on a five-point Likert scale whether the statement was never/almost never true (coded as 1), occasionally true (coded as 2), sometimes true (coded as 3), often true (coded as 4), and almost always/always true (coded as 5).
There is one scale which you get a score by summing the responses and finding the mean. and no items are reverse coded.