A little while back Mark Lebedew presented a quote by the Duke of Wellington. He used it to make the case that no matter the situation we never fully remember all the events of a match. In fact, we aren’t even aware of all the events of a match (or any other event, for that matter). No one anyone else does either. As a result, it’s important to gather information from as many different perspectives as possible. And they should come from objective sources like video and stats (keeping in mind that they too have their limits).
Think of this from the perspective of your role as coach. We volleyball coaches are largely external viewers of events. Yes, we are active participants in some ways, but our influence on actual play once the whistle blows is relatively limited. That means we are mainly in the role of supposed objective examiners who are there to provide feedback and guidance to the athletes. A big part of that is to provide our players with information from outside their scope of view and recall. We can do that by sharing what we see, showing them video, providing them with the relevant stats, etc.
An important part of this process is understanding each individual. They all have their own scope of vision, primary methods of information acquisition, and filters. For example, some players fixate on their errors. One of our coaching roles in that kind of situation is the make sure they also acknowledge their successes. You could say we help them with awareness of their blind spots and the important information they may not be either collecting or weighting properly.
We need think about things for ourselves along a similar line. Unfortunately, coaches often don’t have coaches of their own to help in the process.