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Consumer behavior as a formal marketing subfield crystallized in the mid-20th century, moving beyond descriptive economics. Its foundational paradigm was Motivational Research, heavily influenced by Freudian and depth psychology, which sought to uncover the hidden, subconscious drives behind purchasing. This approach, dominant in the 1950s, emphasized qualitative projective techniques and symbolic meaning but was criticized for being unscientific and subjective.
A profound shift occurred with the cognitive revolution, establishing Information Processing Theory as the dominant paradigm from the late 1960s through the 1980s. This school modeled the consumer as a rational problem-solver, employing a computer metaphor of input, processing, and output. Core frameworks like the Engel-Kollat-Blackwell (EKB) model and later the Theory of Planned Behavior formalized stages of decision-making, focusing on beliefs, attitudes, and intention formation. This tradition prioritized logical, hierarchical mental processes guiding choice.
A significant counter-movement emerged in the 1980s and 1990s under the banner of Experiential Consumption. Reacting against the cold cognitive computer, this paradigm, drawing from humanistic psychology, phenomenology, and sociology, emphasized the symbolic, hedonic, and aesthetic dimensions of consumption. It focused on affective responses, fantasies, feelings, and fun, studying consumption as a primary source of meaning and experience rather than merely a solution to a problem. This school brought emotions, narratives, and the consumption context to the forefront.
Parallel to and following the experiential turn, the Behavioral Decision Theory (BDT) paradigm gained immense influence. Importing findings from cognitive psychology and behavioral economics, it systematically documented deviations from rational information processing, such as heuristics, biases, framing effects, and context-dependent preferences. Unlike the grand models of Information Processing, BDT often employed a micro-level, experimental lens to uncover the systematic "irrationalities" in judgment and choice, fundamentally challenging the normative rationality assumption.
The contemporary landscape is characterized by the coexistence and integration of these major families. The Information Processing tradition continues in refined forms, particularly in technology adoption models. The Experiential paradigm thrives in studies of brand communities, transformative consumption, and digital experiences. Meanwhile, Behavioral Decision Theory remains a powerhouse, directly informing domains like nudging, choice architecture, and behavioral public policy. The subfield's history is thus a progression from uncovering hidden drives, to modeling rational choice, to embracing experiential depth, and finally to cataloging and leveraging the bounds of rationality.