Referring to my previous posting, we decided in the end to not issue any instructions to the participants about staying on the library website.  However, when a participant went off the site, the moderators asked them why and then directed them back on to the library website.  This way, we have hopefully captured a picture of the points on the site that drive people off while keeping the focus of the study on the usability of the site itself.   Forty two Fresno State juniors participated last week and now were working out the coding procedure.