The ethology of inter-individual differences

Abstract

In recent times psychologists have shown a growing interest in ethological methods of data collection. At the same time ethologists are showing a growing interest in the methods of data processing as developed in personality psychology. These methods of data processing appear to be most useful to ethological research when investigating differences between individuals. Using factor analysis of aggressive behaviour as an example, it is argued that an ethological approach which focusses on individual differences may add substantial information to the models derived from a (classical) ethological approach which only concerns general pictures of species. The advantages of the proposed research procedures are discussed, especially in relation to behavioural genetic and ontogenetic research.