The Implicit Association Test (IAT) is a reaction-time based research method originally developed in social psychology to measure the strength of automatic associations between concepts, such as a brand and attributes like trust, quality, or danger. In brand, concept, and messaging research, the IAT helps teams uncover emotional and attitudinal responses that exist below conscious awareness, complementing what respondents say with evidence of what they instinctively feel. Because explicit survey responses are subject to social desirability bias and deliberate self-presentation, the IAT provides a layer of insight that direct questioning cannot reliably access. Enterprise research teams use it to evaluate brand positioning, test messaging resonance, and identify gaps between intended and perceived brand identity.