This paper presents a multi-agent model for simulating attitude formation and change based on individual's affective response to the perception and communication of information. Individuals observe actions performed by social objects, they exchange beliefs about the actions depending on their narrative interest and compute attitude values toward the social objects. The affective response considers the emotional impact of the action for the participants and its unexpectedness. We illustrate , through several simulation experiments, the role of these affective components on attitude dynamics.