title: Amsel's analysis of reward-schedule effects.
abstract: Some questions raised by Amsel's valuable review of his extensive research on reward-schedule effects are considered-questions about the nature of instrumental conditioning, about the distinction between long- and short-term memory, and about evolutionary divergence in learning.
authors.affiliation: Békésy Laboratory of Neurobiology, 1993 East-West Road, 96822, Honolulu, HI, jeffb@ahi.pbrc.hawaii.edu.
authors.forename: M E
authors.initials: ME
authors.lastname: Bitterman