Feedback that begins with an appreciation (plus
or +) makes any subsequent suggestion for change (delta
or Δ) more likely to be heard and taken up. It also has an effect on our giving of such feedback, namely, to shift us away from being consumers or critics and make us collaborators or supporters of the ongoing development of the recipient of our feedback.
Plus-Delta Feedback can be given verbally and quickly—thus more regularly—at the end of sessions in a go-around or Closing Circle
(Check-Out) in which each person contributes only one + item and one Δ item.
Plus-Delta Feedback can also be used for self-evaluation. For this you need a set of objectives and for each you state a plus (something you did well) and a delta (some way to improve or develop).