Do people pay any attention to the pictures included in introductory psychology textbooks?

Goldstein, Bailis, and Chance (1983) presented 47 participants with a large number of pictures and asked them to pick out the ones they recognized. Many of the pictures were taken from the introductory psychology textbook the students were using. The experimenters also presented the same pictures to 56 students who were using a different text. For each participant they recorded the percentage of pictures correctly identified. In addition, they asked participants in the first group to indicate the degree to which they used textbook pictures in general as study aids. How would you analyze the data on recognition and the data on reported use of pictures?