Addictions and Substance Use

Behavioral theory seeks to explain human behavior by analyzing the antecedents and consequences present in the individual's environment and the learned associations he or she has acquired through previous experience. This entry describes the various traditions within the behavioral perspective (classical conditioning, operant conditioning, cognitively mediated behavioral theory, and functional contextualism) and the clinical applications that are derived from them. Common criticisms are discussed in light of the ongoing evolution of behavioral theory and the fit of its tenets with the field of social work.

AIDS (acquired immunodeficiency syndrome) is the most deadly epidemic of modern times. Since HIV (human immunodeficiency virus), the virus that causes AIDS, was first identified in the United States in 1981, nearly 1 million Americans have been diagnosed with AIDS and 530,756 have died. Forty million people are living with HIV worldwide. Although AIDS is still a fatal disease, new drug therapies have greatly slowed the course of disease progression and enhanced quality of life for persons living with HIV. Nevertheless, monumental disparities persist within the United States and between the developed and developing worlds in this two-tiered epidemic.

Scientific findings from social sciences, neurobiology, endocrinology, and immunology highlight the adaptive benefits of positive emotion and activity to both mental and physical health. Positive activity, such as engagement with music and exercise, can also contribute to favorable health outcomes. This article reviews scientific evidence of the adaptive benefits of positive emotion and activity throughout the life course, with examples drawn from the fetal environment through late adulthood. Specifically, the text weaves together theory and empirical findings from an interdisciplinary literature to describe how positive emotion and activity help to build important cognitive, social, and physical resources throughout the life course.