This study assesses the state of political candidates’ verbal and nonverbal expressive behaviors during televised debates in four Latin American countries (Mexico, Colombia, Peru, and Argentina), a region largely overlooked in debate studies where uncivil behavior driven by populism and related ideologies is on the rise. Utilizing human annotation for both descriptive analysis and training and validation of machine learning classifiers, we analyzed 900 ten-second segments from recent debates in each country to detect behaviors associated with a populist style, including adversarial rhetoric and verbal attacks, an aggressive or threatening tone, angry facial expressions, and defiant gestures. We also identified agentic behaviors characterized by assertive, dynamic, and physically energetic actions, lacking the aggressive or threatening markers. Findings reveal distinct communication styles across countries coalescing around a core tendency. While aggressive and adversarial behaviors were anticipated, the predominant style observed was agentic, characterized by assertive and dynamic gestures absent displays of anger, defiance, or hostility. Agentic behavior was common despite the diversity in debate formats and party systems. The study underscores the importance of multimodal analysis in understanding political communication cross-nationally and provides insights into the political styles and performative strategies employed by Latin American candidates in the countries observed.
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