Arousal-Cognitive Integration era
In the Arousal-Cognitive Integration era (1954–1990), affect regulation was theorized as the joint outcome of physiological arousal and cognitive appraisal shaping attention, cue use, and action selection. Schachter and Singer (1962) formulated the two-factor theory showing that an undifferentiated arousal state is interpreted through contextual cues, providing a concrete mechanism linking arousal to emotion and regulatory behavior. Richard Lazarus's cognitive appraisal framework, advanced in the 1960s through the 1980s, argued that event evaluations of significance determine emotional meaning and regulatory responses, thereby integrating cognition with arousal-driven processes. Silvan Tomkins contributed an affect-centered account positing discrete core affects that organize perception and action, positioning bodily signals and expressive cues as co-regulators of affect and behavior in this era.