This article is concern of physical environment that effects of indivsual behavior whose occupy it. Stress is one of these reflections which integrate by indivsual needs and coping resources. There are few design characteristics that have the potential to challenge human adaptive spatial resources, stress occurs when there is difficult predictability of misaffordances of internal environment.
The results of this articles is that the arrangement of boundaries and the openness of the perimeters affect, to the predictability.
Key words: stress, predictability, internal environment.