These include unconscious movements, facial expressions, tone of voice, and physical appearance. For example, according to Hargrave, fidgeting and the wringing of hands indicate nervousness. This seems obvious to most people because they have been interpreting signals such as these for their entire lives. Forming impressions comes naturally. Facial expressions are a powerful source of information.
People use their innate and learned facial muscular movements to either express or mask emotions.
Voice pitch can also lead to many impressions, probably inaccurate, but preconceptions nevertheless. For example, a high pitched, squeaky voice may signal unintelligence, while a deep, resonant voice may command respect. There are also other vocal sounds such as groans and sighs that convey meaning. Finally, physical appearances send messages. Of course the perceptions that people may form from the previously discussed modes of nonverbal communication are not necessarily accurate.