P. Marler* and H. S. Terrace** *The Rockefeller University Field
Research Center Millbrook, NY 12545 **Dept. of Psychology, Columbia
University New York, NY 10027, USA For the first half of this century,
theories of animal conditioning were regarded as the most promising
approach to the study of learning - both animal and human. For a variety
of reasons, disillusionment with this point of view has become
widespread during recent years. One prominent source of disenchantment
with conditioning theory is a large body of ethological observations of
both learned and unlearned natural behavior. These challenge the
generality of principles of animal learning as derived from the
intensive study of a few species in specialized laboratory situations.
From another direction, the complexities of human language acquisition,
surely the most impressive of learned achievements, have prompted
developmental psychologists to doubt the relevance of principles of
animal learning. Even within the realm of traditional studies of animal
learning, it has become apparent that no single set of currently
available principles can cope with the myriad of new empirical findings.
These are emerging at an accelerating rate from studies of such
phenomena as selective attention and learning, conditioned food
aversion, complex problem- solving behavior, and the nature of
reinforcement. Not very surprisingly, as a reaction against the
long-held but essentially unrealized promise of general theories of
learning, many psychologists have asked an obvious question: does
learning theory have a future? 2 r. Marler and B. S.