xiii Introduction Psychotherapy continues to progress at a remarkable rate as researchers and clinical scientists become ever more creative in the development and application of a wide variety of empirically based techniques (Bernstein, Teachman, Olatunji, & Lilienfeld, 2021). Older techniques are being refined, and newer ones are emerging. All of them are being quantified, evaluated, and compared using ever more sophisticated process-and- outcome research, as researchers and clinicians work toward answering what Gordon Paul (1967) called the “ultimate question” about the effec- tiveness of various treatment strategies: “What treatment, by whom, is most effective for this individual with that specific problem, under which set of circumstances, and how does it come about?” One such strategy is progressive relaxation training (PRT), a set of methods that originated in the 1930s in the writings of Edmund Jacobson (1934, 1938).
Previous Page Next Page