Introduction: Given the importance of happiness in old age, it is important to propose and test a multivariate model for relations between its predictor factors. In the present study, the conceptual model of the relationships between spiritual intelligence, psychological hardiness, perceived social support, and happiness was tested in elderlies. Method: The research design was correlational. A sample of two hundred and eleven old woman, were selected through convenient sampling from four cities in Mazandarn province, Iran in the summer of 2016. All participants were asked to complete the Revised Oxford Happiness Inventory,
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