Which of the following is a behavioral sign of deception during an interview?

A change in tone of voice during an interview can often indicate deception. Individuals who are being dishonest may exhibit an altered tone due to increased anxiety or stress that commonly accompanies lying. A higher pitch, wavering quality, or unusual inflections in their speech can serve as indicators that the person may not be telling the truth or is otherwise uncomfortable with the subject matter. This behavioral sign is particularly important for interrogators and interviewers to observe as it may signal inconsistencies in the individual's account, prompting further probing or investigation into the statements being made.

Maintaining consistent speech volume, showing neutral facial expressions, and sitting still without distractions typically reflect calmness or composure, which do not inherently suggest deception. These behaviors can be observed in truthful individuals as well and do not necessarily signal a lack of honesty. Thus, a change in tone of voice is a more direct behavioral indicator of potential deception in an interview setting.