Increasing inclusiveness with a short pro-diversity film

This experiment had three novel aims: 1). To test the (pre-registered) hypothesis that a 4-minute, locally produced film about inclusiveness reduces intergroup bias and increases cohesion among city residents; 2). To explore whether a local message (i.e., targeted at the respective city) or a universal message (i.e., targeted at people in general) is more effective; 3). To explore whether a dual identity message creates stronger bias reduction. City residents (N = 902) of various ages, educational and professional backgrounds watched the local film, the universal film, or no film. A subsequent survey showed that both films were (equally) effective in reducing in-group favoritism and increasing cohesion, pro-diversity norms, attitudes, and pro-diversity
motivation. They were not effective in increasing support for pro-diversity policy or pro-diversity behavior. Perception of a dual identity message predicted stronger bias reduction. We conclude that a short film can cause a small but significant improvement in inclusiveness