Your constructive feedback can be both critical and complementary. More importantly, the receiver needs to find it understandable and applicable; otherwise, it's meaningless. How do you know that your employee is able or willing to use your feedback, even if it could prove helpful?
There are different reasons why the feedback does not have its intended impact. Sometimes, feedback can be hard and uncomfortable to deliver; it ends up vague and incomplete. Your intentions may not be understood and found unmotivating. Thus, your employees hear it and that's it; they don't want to or aren't able to use it.
There may be one important thing you may be forgetting to focus on. Effective feedback ties to things the person is currently doing; what can they adjust and what they should continue doing. And, what are we talking about when we refer to "doing"? We are talking about behaviors. And, behaviors is what DISC is all about.
DISC helps identify the preferred behaviors of your people, including how they prefer to receive feedback. It's helpful because you can better understand their motivators, fears, and preferred ways of communication.
D-styles typically do not respond emotionally to criticism. They might even think, "Criticism? What's that?" Constructive criticism should zero in on what behaviors are helping your D-styles reach their goals. D'styles prefer "what" questions such as, "this is what's in it for you."
Consider delivering feedback in the form of a challenge to spark their natural competitiveness. You could say, "you closed 20 deals last quarter. Great job! If you adjust your cold calling system this way, you'd be able to close at least 25 deals this quarter and come out on top. What do you think?"
Your I-styles are receptive to feedback if it's done in a more casual setting, where they have time to interact with you. Be more personable and give them opportunities to speak. Focus more on emotions and keep topics positive; avoiding negatives whenever possible. Avoid too much details and data.
Try to focus more on people-oriented "who" questions, such as, "one of your strengths is your ability to connect people together. Who could your networking strengths be used on to help us launch this project?"
Your I-styles fear a loss of influence and social rejection. Frame your feedback to focus more on their personal achievements and used more effusive descriptors. Also, share their successes publicly whenever possible.
Your S-styles seek your approval and viewpoint, but at the same time, they need time to process your feedback. They tend to fear sudden changes and disruptions to their status quo. Answer their questions carefully and provide assurance and support whenever possible.
Your S-styles are team players. Try framing your feedback in plural form over individual. For example, ask them "how we are going to manage the upcoming changes to the team's goals?" or "how can we improve our customer response system?"
Your C-styles are more receptive to feedback that focuses on agreed upon standards and supportive facts. They prefer to receive feedback in a more formal environment; minimizing the personal and abstract chitchat.
Your C-styles fear criticism of performance and surprises. Prepare them for the feedback session by providing as much information as possible; preferably in writing.
During the session, try to slow down and proceed logically. Be prepared to answer their questions with supportive and detailed information. It may be better to offer the additional information in writing so they have time to process the information.
Your C-styles ask and respond well to "why" questions. For example, "the reason why, I've identified these areas is because..."
If you have access and permission to review the DISC results for your team members, then you have valuable information on how to deliver meaningful feedback.
Another option is to run the Pair Assessment for you and your direct report. It will help you understand how your DISC-styles complement one another and where behavioral gaps exist. It will not only improve your feedback session, but your overall interactions.