The Regret and Disappointment Scale

The regret and disappointment scale (RDS) is a valid instrument for assessing regret and disappointment in decision making. As the scale does not contain the words 'regret' and 'disappointment', this scale can measure these concepts even if participants and researchers rely on different definitions of the concepts.

Composition of the RDS
Participants can respond to the RDS using a 7-point Likert scale, anchored at 1 (Completely disagree) and 7 (Completely agree).