| Topic Code | Description |
| Social Context | Prestigue/bias: who conducted, funded research, where conducted, published |
| Method | How research was conducted, research design and procedures |
| Theory/Agent | Why effects occurred, properties of causal agents, underlying mechanisms |
| Data/Statistics | What was observed in the reported study or statistical tests |
| Related Research | Replication of or connections with other results |
| Relevance | Importance or applicability of findings |
Topic code categories (adapted from Zimmerman et. al. 2001, p. 40)