The metal shelving unit consisted of two shelves (see Logan & Fischman, 2011 for a picture of the apparatus). The upper
shelf was 139.7 cm and the lower shelf was 92.7 cm from the floor. The two drinking glasses were the same size (14.6 cm
high, 7.1 cm diameter) and had a band of blue tape (2.6 cm wide) around the bottom for clear identification of glass orientation.
At the start of each trial, the glasses were placed 27.9 cm apart on the upper shelf. The lower shelf contained two
taped locations for the glasses to be placed, also spaced 27.9 cm apart. Centered midway between the tape marks was a
2 1
2-cup plastic measuring cup containing about 1
2 cup of water, with the cup’s handle facing the participant. Below the
two tape marks and cup of water was a rectangular piece of paper (3.8 cm height 21.6 cm width) divided into 12 equal
squares. Participants used this as an aid to recall each item in serial order.