The document discusses key concepts in interpersonal communication including:
1) A perceptual model of communication that involves sources, encoding, messages, channels, decoding, and receivers.
2) Sources of distortion in upward communication such as situational antecedents and communication styles.
3) Different listening styles and keys to effective listening including focusing, avoiding distractions, and challenging oneself.
4) Barriers to effective communication such as process, personal, physical, and semantic barriers.