Psychological signals are cues that indicate a person's mental state or emotional condition. These signals can be verbal, such as tone of voice and choice of words, or non-verbal, including body language, facial expressions, and eye contact. Understanding these signals can help in interpreting how someone feels or reacts in a given situation. In various fields, such as psychology and communication studies, recognizing psychological signals is essential for effective interaction. For instance, a therapist may observe a client's body language to gauge their comfort level, while a manager might assess team members' expressions to understand their engagement during meetings.