The cryptic reaction shot has grown dramatically in movies. The shots are designed to enhance viewers’ emotional involvement with characters. They depict a facial gesture that reflects a slightly negative and slightly aroused emotional state

Cutting, J. E. and Armstrong, K. L. (2018), Cryptic Emotions and the Emergence of a Metatheory of Mind in Popular Filmmaking. Cogn Sci. doi:10.1111/cogs.12586

Abstract: Hollywood movies can be deeply engaging and easy to understand. To succeed in this manner, feature-length movies employ many editing techniques with strong psychological underpinnings. We explore the origins and development of one of these, the reaction shot. This shot typically shows a single, unspeaking character with modest facial expression in response to an event or to the behavior or speech of another character. In a sample of movies from 1940 to 2010, we show that the prevalence of one type of these shots—which we call the cryptic reaction shot—has grown dramatically. These shots are designed to enhance viewers’ emotional involvement with characters. They depict a facial gesture that reflects a slightly negative and slightly aroused emotional state. Their use at the end of conversations, and typically at the end of scenes, helps to leave viewers in a state of speculation about what the character is thinking and what her thoughts may mean for the ongoing narrative.