Iranian Social Psychology association Social Psychology Research 2251-8002 5 20 2016 02 20 The Role of Time Perspective in Academic Performance Mediated by Procrastination and Self-efficacy The Role of Time Perspective in Academic Performance Mediated by Procrastination and Self-efficacy 121583 FA Journal Article 2020 12 29 https://www.socialpsychology.ir/article_121583_254f9a568f60e894cdae35fcc24129b6.pdf