Which of the following characteristics relate to the psychological stress analyzer?

The psychological stress analyzer is a device that measures responses indicative of stress, often used in situations like criminal interrogations or security screenings. One key characteristic of the psychological stress analyzer is that it does not require any physical connection to the subject’s body, unlike traditional polygraphs which use sensors on the skin. This non-intrusive approach allows for more flexibility in situations where a physical connection might be undesirable or impractical.

Additionally, the device's method of operation means that subjects are not limited to responding with simple "yes" or "no" answers. Instead, they can provide more elaborate responses, which aids in capturing a fuller range of emotional and psychological reactions that may correlate with stress levels. This nuanced approach is significant, as it allows for a better understanding of the subject's state of mind beyond binary responses.

Moreover, the ability to use the psychological stress analyzer covertly is another important feature. This means that it can be deployed in scenarios without the subject being fully aware of it, which can be advantageous in security and investigative contexts where overt questioning might lead to altered behaviors.

Combining these factors—no need for physical connections, allowing for open-ended responses, and the potential for covert use—reflects the comprehensive nature of the psychological stress analyzer.