This article aims to integrate the findings from various research traditions on human judgment and decision making, focusing on four process variables: arousal, affect, motivation, and cognitive capacity/ability. We advocate a broad perspective referred to as the integrative process approach (IPA) of decision making, in which these process variables explain the effects of dispositional and situational input variables on information processing and decision making. From this integration, underinvestigated issues that represent promising avenues for future research are delineated, and the merits of the present approach for a more refined interpretation of previous research on judgment and decision making are discussed. We argue that the simultaneous consideration of the various process variables is crucial to advance our insight in this important domain of inquiry. (Contains 2 figures and 1 table.)