This article aimed to 1) replace the concept of "attachment" in the literatures of developmental psychology to the terms of neuropsychology, and 2) consider the roles and mechanisms in the development of higher cognitive functions. Especially, we propose a neuropsychological model (orbitofrontal-dorsolateral-subcortical region cooperative model) which explains the individually different higher cognitive functions. We suggest that individual differences in cooperation of activation patterns in prefrontal and subcortical regions can explain performances in everyday adoptive tasks which we tackle with. Then we try to explain how stress disorders occur by using this model.