Which of the following is NOT correctly classified as a barrier to effective organisational communication?
I.   Semantic Barrier — Differences in the meaning attributed to words or symbols by the sender and receiver due to language or jargon differences.
II.  Psychological Barrier — Emotional states such as stress, anger, or distrust that distort the encoding or decoding of messages.
III. Physical Barrier — Excessive use of formal channels and hierarchical reporting structures that delay information flow.
IV.  Organisational Barrier — Geographic distance, noise, or defective communication equipment that impedes message transmission.