Have you called the psychology departments at Smith, Amherst, or Mount Holyoke? I expect that at least one of them might have students do IQ testing as part of a class. If they don't, someone at one of the departments might have a suggestion for you.

I don't know if Hampshire College has a traditional psych. department, and UMASS is pretty big an so getting through to someone might be harder. But I'd say you should be able to get some advice at at least one of the five colleges.

Val