The social identity model of collective action (SIMCA) and the encapsulation model of the social identity of collective action (EMSICA) are well-known models that have been applied to protest action. The current study tests the predictive value of the core constructs in the models (social identification, perceived injustice and group efficacy) in a peaceful pro-environmental program. Specifically, we sought to answer whether the two models provide equally good accounts of (self-reported) past participation and of intended participation. To do so, we conducted a survey of 382 participants of a sustained environmental collective action program (Nature Cleaners) in Iran. Our findings underlined the important role of social identification in predicting environmental action. The results also showed that SIMCA was more relevant for intentions to participate, whereas paths specified by EMSICA better predicted past participation. The results provide a demonstration of the applicability of collective action models to the domain of pro-environmental action in the Iranian cultural context where collective action is rarely studied. Overall, the findings highlight the importance of studying collective action in a wider range of situations and contexts.

中文翻译：

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在伊朗环境运动中测试集体行动的社会认同模型

集体行动的社会认同模型（SIMCA）和集体行动的社会认同的封装模型（EMSICA）是众所周知的应用于抗议行动的模型。当前的研究在和平的亲环境计划中测试模型（社会认同、感知的不公正和群体效能）中核心结构的预测价值。具体而言，我们试图回答这两种模型是否对（自我报告的）过去参与和预期参与提供了同样好的说明。为此，我们对伊朗持续环境集体行动计划（自然清洁工）的 382 名参与者进行了调查。我们的研究结果强调了社会认同在预测环境行为方面的重要作用。结果还表明 SIMCA 与参与意图更相关，而 EMSICA 指定的路径更好地预测了过去的参与。结果证明了集体行动模型在很少研究集体行动的伊朗文化背景下的环保行动领域的适用性。总的来说，研究结果强调了在更广泛的情况和背景下研究集体行动的重要性。