AFFORDANCES, CODES, AND DECISION-PROCESSES - A RESPONSE TO MICHAELS (1993)

In her commentary on R. W. Proctor, T. Van Zandt, C.-H. Lu, and D. J. Weeks (1993), C. F. Michaels (1993) claimed to have demonstrated a des tination compatibility effect that cannot be attributed to relative di rection coding. She also argued that the concept of ''affordance'' com patibility is needed to supplement the concept of ''coding'' compatibi lity to explain differences in the ease with which people can respond to compatible assignments for different stimulus and response sets. Ne ither of these assertions is supported by existing evidence. The desti nation compatibility effect, as well as most other stimulus-response c ompatibility phenomena, can be attributed to decision processes that o perate on stimulus and response codes.