Lewis has experienced acute stress for several years. Currently, he is using a device that monitors and displays the tension levels in his forehead muscles to help him relax. Which technique is Lewis utilizing?

Explanation

The technique Lewis is using is biofeedback, which involves using electronic devices to provide real-time information about physiological functions, such as muscle tension, to help individuals gain control over these functions. This differs from the general adaptation syndrome, psychoanalysis, and cognitive therapy, which do not involve direct monitoring of physiological signals.