Issues in comparative psychology at the dawn of the 20th century

Comparative psychology emerged as part of the "new psychology" that took hold in the United States around 1900. Many of the issues that have occupied comparative psychologists throughout the 20th century were developed as research problems during this period. In some respects, comparative psychology was then an integral and widely respected part of psychology at large; in others, it was already marginalized. Issues emerging during this critical period set the program for the upcoming century and included those of methodology in the conduct of experiments and conceptual issues related to evolution, development, intelligence, and higher processes.