Most people are probably less accustomed to masking their posture than their facial expressions

They make it possible to express pleasure, displeasure, contempt, or doubt. Thus, pulling down the comers of the mouth while furrowing the forehead can signal doubt. Anger may be displayed with an open ~quare mouth or by lips pressed tightly together, accompanied by brows drawn together.

Posture
Most people are probably less accustomed to masking their posture than their facial expressions; thus, posture can serve as a reliable source of information for the manager. The way a person walks, stands, or sits can reveal a wealth of valuable information. Thus, a person can face one person, stand over another, or slump in front of or "give the shoulder" to another. It is possible to lean forward or recline backward, to lean to the right or the left, to sit erect, or to slouch. A person can open .up in a sprawling, relaxed pose or be defensive with closed arms and legs locked in tight
What does all this mean? No specific, irrevocable rules exist, but some general principle~' apply. First, a person is drawn toward something he or she likes. When a person leans toward a manager in conversation, it is often safe to aSsume that the person likes the manager. At the same time, since leaning forward may also indicate an aggressive attitude, the context shquld be considered.
Second, people position themselves in alignment with others. Frequently, the degree of mutual involvement con'esponds to the degree that two people mutually align their heads, shoulders, and hips. People in conversation will often make subtle postural adjustments to one another to create their own preferred degree of alignment.