Barriers to Effective Communication -

1. Frame of Reference
2. Selective Listening
3. Value Judgments
4. Source Credibility
5. Filtering
6. In-Group Language
7. Status Differences
8. Time Pressures
9. Communication Overload

From the above list, In your experience, which of the barriers to effective communication are responsible for the most communication problems? Which barrier is the hardest to correct? (provide detailed answer at least for 2 types)

Please share with citations and references.