ABSTRACT
My first duty in these final comments is to thank my colleagues who have contributed to this volume. From my perspective, the volume makes a solid contribution to research on instructed SLA in that it brings together a number of focused empirical studies that carry built-in replication on a variety of questions related to PI. The additional critical commentaries in each section and the final commentaries make this volume unique and balanced. Inspired by both the research and commentaries, my job here is to point to directions for growth in research on PI Before doing so, I touch on some ideas related to IP, given that it underlies the very nature of PI.
