"INTRODUCTION:In the past the concept of 'Phenomenal Absolutism' dominated the thinkingprocess. This concept, based on the assumption that all people perceivealike, also governed spatial planning and design. Unfortunately, the implica-tion of this assumption on cross-cultural interaction, including the builtenvironment is often still under-estimated. The designed environment has asilent language. It manifests itself in the behaviour of its, inhabitants, whichin turn governs the use of space. The spatial goodness depends on the degreeto which this language fulfils the inhabitant's 'ideal environment'.OBJECTIVE:This paper attempts to first, illustrate the fundamental principles and' im-plications of cognition and perception on the built environment. Rapaport'sconcept of 'genre-de-vie' will be referred to, and be examined in relation toresearch on time concepts, within different cultures, and the brain. Second,this paper amplifies how cognition and perception affect behavioral pat-terns, thus spatial development, using an educational facility to demon-strate.ASSUMPTIONS:The objectives have been based on a number of assumptions.i) Spatial design refers to the built environment. However the principlescan be applied to any spatial planning and use.ii) The built environment is a human scale product. It is a three- dimen-sional embodiment of culture besides being a physical representation of hu-man functions.iii) Time is the core of cultural communication. It is a primary organizer,synthesizer and Integrator. Thus the consistent factor to assess socio-cultural built environments as well as integrate the thought processes of thebrain hemisphere.iv) Humanity perceives and comprehends their environment through theirbrain. Only the right and left hemispheres of the brain, will be referred tofor simplification.v) Education is the machinery that manifests culture or cultural change."The environment of education is not peripheral to the central issue of edu-cation itself". (1)Conclusion:In the final analysis this paper attempts to highlight the possible dissonancebetween spatial planning and behaviour, due to acculturation. The suggestionto fathom time concepts and basic behavioural patterns, [situational frames(2fl, and apply them to cross-cultural planning, design and use, may be apossible resolution."