1. Appendix becomes part of a printed manuscript, which also constitutes additional information or materials in a manuscript that function to make it easier for readers to understand, assess, and replicate results or theories in research.
2. The appendix can manifest in texts, tables, pictures, or a combination thereof.
3. The information displayed in the Appendix may vary, which can manifest in a list of stimuli in an experiment, a list of scale items of research, and so on.
4. The appendix also has specific styles of numbering and formatting, which can be checked in the following document:
Appendix APA 7th edition