This book describes a unique study on the usefulness of benzodiazepine tranquilizers given in conjunction with and compared to therapeutic counselling for the treatment of minor psychiatric disorders. International collaboration under the sponsorship of the WHO made this first cross-cultural comparative study possible. Important methodological findings about measurement instruments, as well as data about the effects of different treatments, resulted from the study. It also demonstrated the possibility of using quantitative scientific methods to measure milder forms of psychiatric disorders and their changes.