I think I might have the perfect candidate. My friends widow.
She is a novice rider and although she enjoys it she is scared of horses. They have two bird dogs they field trial so she started riding so that she could enjoy her time up in the saddle more...well surprise, surprise...she loves it. But she is still struggling to get comfortable around them.
I have an MA in psyc and would be happy to help you do some sort of analysis if you want. If can get a larger group of people and if you like I will help you with coding the written results and doing a statistical analysis of it. We can also put together a small scaled measure to help quantify your results. Just let me know.
In the mean time I'll talk to his widow and see if she might be interested. This will also coinside beautifully with our gift to her. We want to buy her 8 private lessons at the barn I ride at.