ABSTRACT
This chapter emphasizes an approach that focuses on attitudes and activities and numerous applications which is known by the acronym AIO (Activities, Interests, and Opinions). It defines and retraces the history of the AIO approach. The introduction of the concept of attitudes is relatively recent in the study of behaviors. Attitudes serve at least three psychological functions: compliance, identification and internalization. Three principal components to an attitude include: a cognitive component, an emotional component, a conative component. Feldman and Hornik proposed the following categories of activities: work, necessities, domestic work, and leisure time. The concept of attitudes and activities in relation to lifestyles has led to three types of studies: studies that center on interests; studies that focus more specifically on attitudes relative to a particular product; studies similar to AIO, examining a large scale of activities and attitudes. AIO's diverse and sweeping nature, along with a lack of clearly defined theoretical foundations for the approach led to considerable criticism.
