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The Intelligent Brain

In this chapter I address the question as to why brain size and its variation is interesting. Because for many the answer is that a bigger brain endows greater intelligence, in this chapter I first provide a definition of intelligence, or cognition. I then describe a variety of factors that need to be considered in order to attempt to make comparisons, within or among species, of cognitive abilities. These include motivation, environmental factors, and methodologies used to train and test animals (typically) in the laboratory. For the remainder of the chapter I use the demonstration of the relationships between food storing, spatial cognition, and the hippocampus to illustrate these issues.