1. The document is a journal entry by a student named Ng Sheng Zhe describing three experiences related to concepts in social psychology.
2. The first entry describes an experience with social loafing where the student puts less effort into a group project expecting others to do more work.
3. The second entry discusses an experience with self-serving attribution where the student takes credit for success but blames external factors for failure in a marching competition.
4. The third entry involves counterfactual thinking where the student reflects on missed opportunities to confess to a crush and feels regret (upward counterfactuals).