The Rorschach inkblot test is when a subject looks at some pictures made by inkblots and the answers to what the person interprets the inkblots to be is evaluated. It is more than just what the person says the inkblot is but how long it takes for the person to respond and how the person sees movement and color as well. According to Rorschach by having a person look at a random picture and then interpret it weakens the defense mechanisms that the person has built up and the persons unconsciousness is allowed to come out. This in turn allows the psychologist to see into the inner workings of the person.
When we are viewing and seeing things we will perceive them differently than other people do. This is due to our own unconscious thoughts, experiences, beliefs etc... Our characters will work the same way in that they will perceive an object differently than another character in our book. Further, our characters will perceive a situation differently than other characters in our book.
This takes me to another discussion that I had with a co-worker the other day. We were discussing politics and discrimination (you know usual work discussion). It was interesting how a certain situation was seen for one group of people but not for another group. It was easy to observe the faults in one group but not in the other group. This is because of the unconscious and experiences had.
This can easily be tied back to our characters as well. Our characters are fighting for something; they are trying to win the fight/conflict. Occasionally our characters get blinders on and can't see what is happening all around them. This is good because this is what happens in real life. Sometimes our characters weaknesses are there strengths. In other words because the character is so focused on winning the conflict they may not see other options that are just as good and by doing this they may alienate those around them.
The way we perceive an event, experience, object etc. says a lot about who we are.