Institutional Studies I applaud the effot to contact visitors some months after they have seen an exhibition. However, I have two concerns. First, do we know the differences between those who agree to be contacted and those who do not?? Studies have encountered reluctance on the part of many of give out names and phone numbers. Second, what impact does knowing that we will be contacted have on how much thought we give an experience? In other words, "experimental affect." In the best of all possible worlds, we might figure out a way to contact a group that did not give us their contact information. That, in turn, raises issues of protection of privacy...