Currently, the main cause of preventable deaths in the United States is

The idea that opportunities and roles are determined based on age is referred to as

stratification by age. selective optimization. self-actualization. social stagnation.

According to the information in the article Yoking Smokingabout operant conditioning, what did

researchers find in terms of abstinence throughout the study? (a) the progressive and control groups were both equally abstinent (b) the fixed and control groups were both equally abstinent (c) the progressive group was by far the most abstinent (d) there were no real effects of contingent reinforcement