1 Introduction  
2 Psychological Preliminaries and Study Methodology  
3 Systematization Overview  
4 Systematizing Psychological Factors and Techniques  
5 Systematizing Social Engineering Attacks  
6 Systematizing Social Engineering Defenses  
7 Systematizing the Relationships between Attacks, PTs, PFs, and Defenses  
8 Future Research Directions  
9 Conclusion  