IRB stands for Institutional Review Board. If you are conducting research that involves human participants, you will need to get approval from Amherst's IRB before you collect your information.
The goal of review and approval is to ensure that there is no/minimal risk to participants, and that they are fully aware of their rights under federal regulations.
You will need to fill out and submit an application available on Amherst's IRB webpage, which includes an Ethics Review form and Consent Form.
Broadly, you should think through your project in each of these aspects, to prepare for your application:
You will also need to complete human subjects training, which can be done online and for free. Three options are available on Amherst's IRB webpage, and you should request a certificate of completion to include with your other application forms.
After you apply, the Initial Reviewer will assign a category to your application: Exempt (no foreseeable risk), Expedited Review (minimal risk), or Full Board Review (more than minimal risk and protected subjects).
Most research projects will likely be Exempt, in which case it requires no further review. Expedited Review projects are forwarded to the Expedited Reviewer. Full Board Review projects require the most time, with the IRB as a whole performing the review.
Amherst's IRB webpage has more detailed information on the process and components, including links to the required application form and ethics training.