Sometimes we just have to force ourselves to listen and concentrate. It may not be fun, but it beats being unemployed. Being easily distracted. This may be a combination of several of these other problems, and it involves the ability to concentrate well. Think about the last time you were speaking with someone whose eyes were constantly darting around the room to see other people, and who visibly reacted every time there was a sound other than your voice.
Concentration is an art form.
Taking a detour. This one is subtle also, and happens so quickly, we usually don't recognize it until much later, if at all. In a class I taught a number of years ago, we were discussing anger, and what types of situations caused us to get angry. One student mentioned traffic jams as his most anger-producing situation, and another student immediately chimed in with a story about how traffic had become a problem in her community. She went on for several minutes, relating in detail what the town was contemplating regarding its traffic congestion problem.