Positive Psychology: Introduction to the Special Issue (In memoriam: Chris Peterson)

This special issue of Terapia Psicologica includes relevant contributions to the field of Positive Psychology, written by international researchers on well-being from Chile, Canada, Italy, Mexico, Netherlands, Spain, and USA,. Rather than viewing the field complacently, this issue contains critical reviews of the literature, which raises intriguing questions about the interpretation of past research and the possibility of answering those questions in the future. Original research is also presented and the methods used are both correlational and experimental, with cross-sectional and longitudinal designs. The content of these works include developmental and health-related issues, the positive and negative impact of traumatic experiences, and the effect of controlled experimental interventions on improving well-being. In conclusion, this issue reflects the increasing maturity of the Positive Psychology field and the growing complexity of the issues addressed as well as the methodologies used.