During the past two decades, remarkable advances have been made in psychopharmacology, resulting in increased demands for journal space (witness the large number of journals that cater primarily or exclusively to this topic). Concomitantly, a need developed for more integration of the currently available data. To this end, numerous edited volumes in psycho- pharmacology have appeared which have been primarily concerned with the role of a particular drug or system in modulating a wide variety of behaviors. While such texts have been most useful in elucidating drug mechanisms and the etiology...