Watch people as they talk with each other. Observe their hand gestures, watch their body language, listen to the tone of their voice. Are they speaking frankly, directly, saying exactly what they think? Are they brief and to-the-point? Or are they giving elaborate explanations, displaying impressive vocabulary, being tactful and circumspect? What you’re observing is the Communication Dimension, and there’s a great deal you can learn about culture by observing it.