Right now, unless something has changed, when we use the Subjects list to apply additional terms, the OR statement is automatic and there is no alternative. However, that is not necessarily how a student thinks when selecting Subjects. There are many times one will want to have more than one subject term added to the search with an AND statement.

So, for example, if I am looking at "emergency nursing" and I see in the subjects list "hospitals" and "health policy & services" I may want both terms in my search not either.

If it's doable, it would be nice to be able for the user to define how they want the subject list additions to be applied. So providing a choice between AND or OR would be helpful.