THE RESEARCH TRADITION OF EP Evolutionary psychology rests upon specific theoretical principles not all of which are shared by others working in the biology of human behavior. For example 1 human behavioral ecologists(人类行为学家) present and defend explanatory hypotheses about human behavior that do not appeal to psychological mechanisms. Behavioral ecologists also believe that much of human behavior can be explained by appealing to evolution while rejecting the idea held by evolutionary psychologists that one period of our evolutionary history in the source of all our important psychological adaptations(Irons 1998) 2. Developmental psychobiologists(发肓心理一生物学家) take yet another approach: they are anti-adaptationist. These theorists believe that much of our behavior can be explained without appealing to a suite of specific psychological adaptations for that behavior. Instead they emphasize the role of development in the production of various human behavioral traits From here on, "evolutionary psychology refers to a specific research tradition among the many biological approaches to the study of human behaviorTHE RESEARCH TRADITION OF EP • Evolutionary psychology rests upon specific theoretical principles not all of which are shared by others working in the biology of human behavior. For example, • 1.human behavioral ecologists(人类行为学家) present and defend explanatory hypotheses about human behavior that do not appeal to psychological mechanisms. Behavioral ecologists also believe that much of human behavior can be explained by appealing to evolution while rejecting the idea held by evolutionary psychologists that one period of our evolutionary history in the source of all our important psychological adaptations (Irons 1998). • 2. Developmental psychobiologists （发育心理—生物学家）take yet another approach: they are anti-adaptationist. These theorists believe that much of our behavior can be explained without appealing to a suite of specific psychological adaptations for that behavior. Instead they emphasize the role of development in the production of various human behavioral traits. • From here on, “evolutionary psychology” refers to a specific research tradition among the many biological approaches to the study of human behavior