Final answer:
The specific papers to sign may vary, but they could include an informed consent form, debriefing form, and IRB form. You may need to initial paragraphs and sign twice at the bottom. It is generally not advisable to choose not to sign, especially if the papers are legally binding.
Step-by-step explanation:
Based on the information provided, it seems like you need to sign various papers. The specific papers that need to be signed may vary depending on the context. For example, in the case of an experiment, individuals would typically need to read and sign an informed consent form, a debriefing form, and possibly an IRB (Institutional Review Board) form.
The number of times you need to sign the papers also depends on the specific requirements. In some cases, you may need to initial certain paragraphs and sign twice at the bottom.
Whether you can sign the papers later or not depends on the situation and the deadline for signing. If there is a specific timeline mentioned, it's important to adhere to it. However, it's always a good idea to clarify with the person requesting your signature.
It is generally not advisable to choose not to sign the papers, especially if they are legally binding documents like an employment contract. However, there may be situations where you can negotiate or discuss any concerns you have before signing.