Will grad school indecision leave a poor first impression?
You’ve gotten great advice here already – I’d emphasize again that you should primarily be seeking to clarify, for yourself, what you want to study, and what field you’ll be happiest working in. But it is possible to do this while applying for graduate schools. In fact, I did this myself, applying to graduate school in fields which were, if anything, even less similar than yours, one hard science and several related humanities fields. Here’s how to approach it: you have to be a good applicant in each of these disciplines, which means having specific knowledge and research interests within the disciplines and being willing to pretend in your application that these are your primary interests. It should be easy to do this, based on your genuine motivation and interest – if it is difficult to pretend you’re deeply interested in a topic for the span of an application and a few visits/interviews, then you are almost certainly not interested enough in it to get through a graduate program. You
