Never rely on a single gesture. Look for multiple signals (e.g., foot-tapping + neck-touching + lip-biting) to confirm a person's emotional state.
You can read the Spanish translation ( El Cuerpo Habla ) on various devices. el cuerpo habla - joe navarro pdf scribd
Don't assume a crossed arm means someone is angry. Observe how they behave normally first. Never rely on a single gesture
A partial shrug often indicates a lack of commitment or uncertainty about what is being said. Hands and Fingers not nervous. Always weigh the environment.
A person shivering might just be cold, not nervous. Always weigh the environment.