Developer of the theory of evolution by means of natural selection. Genus Homo . The phylogenetic genus to which humans belong. Johns Hopkins . The university to which Watson was appointed.
Introspection is untrained .
Imageless thought . It had traditionally been believed by many philosophical psychologists that all thought requires a mental image. To think of a table, for instance, is to form an image of a table. Different training . This argument, and the one immediately below in the text, were typical of the disputes that frequently broke out among Wundt's European students.