ABSTRACT
T his chapter will weave together several themes, focusing on two main questions. The first question relates to the use of single-subject designs in psychology. The second question pertains to the role of specialization of knowledge in experts. Specifically, it assesses the relative contributions of perceptual knowledge (e.g., chunks) and general knowledge (heuristics and strategies) to expertise. These two questions are interrelated because probing experts' knowledge is a complex and intensive task, and single-subject designs are one possible avenue to address this issue.
