Dr. Landers' research is currently directed toward a psychological analysis of sport and exercise. In approaching research in this area, a variety of research methodologies are often employed, including questionnaire, behavioral, and psychophysiological measures.  Psychophysiology, which examines the interrelations among psychological and physiological variables so that underlying behavioral mechanisms can be better understood, is sometimes used as an unobtrusive measure to enhance interpretation of behavioral and questionnaire findings.  Recent research emphases include examination of the effects of exercise on (a) relaxation/mood alteration, including anxiety and depression; (b) ability to cope with psychosocial stressors, (c) quality and quantity of sleep, and (d) cognitive functioning.  Another current research thrust has been the use of psychophysiological measures in actual performance settings. The intent here has been to use various measures of brain, muscle, and cardiac activity as markers to infer "preparatory states" or "arousal/attentional sets" conducive to high-level sport or exercise performance.  Much of this work has been with archers, golfers, marksmen, weight lifters, and sprinters, but this analysis can also be extended to other sports.  Biofeedback applications for performance enhancement have also been researched.