If you can do it in a more controlled setting, I would be interested in the results. As others have pointed out, the way I have done it has many problems: lack of controlled randomisation, small number of participants, possibility to see the anchor by accident and still answering the group II question etc. Unfortunately I have no idea how to organise a controlled experiment and don't particularly want to invest much money in it (I suppose people don't like to spend an hour filling questionnaires for free).