ABSTRACT
Are there qualitative as well as quantitative differences in the behavior-adaptive capabilities of animals at different levels of the phyletic evolutionary sequence? That is to say, are there differences not only in the speed of learning but also in the complexity of what the organism can learn at all, given any amount of time and training? Are there discontinuities as well as continuities in capacities to perceive, to learn, and to manipulate the environment as we ascend the phyletic scale?
