This theory can account for several psychophysiological phenomena and psychosomatic illnesses. Eysenck used both behavioral and psychophysiological methodologies to test and develop his theories. Psychologists have performed psychophysiological studies to see what happens in the body during affective experiences. Early life factors include genetic factors, psychophysiological and sociocultural factors, and environmental exposures. A loss of direction, helpless feelings and psychophysiological responsivity are characteristic of kayak angst. These include&colon; psychophysiological, idiopathic insomnia, and sleep state misperception (paradoxical insomnia). It makes use of the psychophysiological finding that greater muscle tone reduces proprioceptive sensitivity. He prescribed daily Progressive Relaxation practice to treat diverse psychophysiological disorders like hypertension. Objective emotion data can be collected by psychophysiological measurements or by observing expressed emotions. Gross' contributions to psychology lie primarily in the area of emotion regulation through psychophysiological research. Sighing in these scenarios might be to attempt to induce psychophysiological relief. In addition to longitudinal studies, there has been psychophysiological research on the biology of attachment. Other early researchers (such as Schmeing, 1938) supported psychophysiological theories. To overcome this, psychophysiological regulation of human organisms is needed. She was elected President of the Society for Psychophysiological Research in 2017.