Preventing smoking in young people: a systematic review of the impact of access interventions.

Aims: To examine existing evidence on the effectiveness of interventions that are designed to prevent the illegal sale of tobacco to young people. The review considers specific sub-questions related to the factors that might influence effectiveness, any differential effects for different sub-populations of youth, and barriers and facilitators to implementation.

Methods: A review of studies on the impact of interventions on young people under the age of 18 was conducted.

The structure of the self-concept and its relation to psychological adjustment.

Research on the relation between the structure of the self-concept and psychological adjustment has produced seemingly inconsistent findings. Some research suggests that greater pluralism in self-concept structure enhances adjustment, whereas other research suggests that greater unity in the structure enhances adjustment. Four studies examined the relations among measures of self-concept structure and their relations with adjustment.

Hunger, eating, and ill health.

Humans and other warm-blooded animals living with continuous access to a variety of good-tasting foods tend to eat too much and suffer ill health as a result--a finding that is incompatible with the widely held view that hunger and eating are compensatory processes that function to maintain the body's energy resources at a set point. The authors argue that because of the scarcity and unpredictability of food in nature, humans and other animals have evolved to eat to their physiological limits when food is readily available, so that excess energy can be stored in the body as a buffer against future food shortages. The discrepancy between the environment in which the hunger and eating system evolved and the food-replete environments in which many people now live has led to the current problem of overconsumption existing in many countries.