Arielle has brought an assortment of shoes to the laboratory to see which ones maximize her comfort and control of the pedals of the laboratory pumps. She begins by working each of the pedals barefoot, then moves on to a pair of flat-heeled T-strap sandals, then a pair of flat-heeled thong sandals, then a pair of mid-height wedge-heeled sandals, and finally, a pair of flat-heeled closed-toe shoes. Which will she prefer? There's only one way to find out!