You are welcome to use our online tools as part of a research project, however they must be used in their original online format (i.e. on the website) and not downloaded, copied, reproduced, or altered in any way. In other words, if you can complete your project by simply using the assessments on our website as any other visitor would, then you're a-OK.
Another option to consider is the IPIP database, which is an excellent source of public domain personality scales (i.e. free to use in your research project however you would like).
If your research will be published in a journal or professional publication, and you need further assistance to accommodate your study design, please Contact Us.