Susan is interviewing for a job. although she is smiling and making good eye contact with her interviewer, he notices that she is also tapping her foot rapidly on the floor. despite her best intentions, what is susan exhibiting

Susan is inadvertently exhibiting nervousness. The smiling and the eye contact is conscious body language behavior whereas the foot rapidly tapping is more subconscious behavior that reveals her nervousness. The interviewer may understand her nervousness, however.