Assistant professor of Interior Design and Architecture, Dr. Tiziana Proietti, recently published her research, “Revisiting the plastic number theory from the perspective of perceptual psychology,” in the Architectural Science Review.
Abstract
Architect Hans van der Laan spent his lifetime studying human perception of proportion. His work led to the development of the plastic number system. In this system every step represents a group of fractions that describe objects of similar sizes. Indeed, each step is defined as the ‘representative size’ of a group of sizes that are perceptually indiscriminate from one another. Over decades of research, Van der Laan conducted a series of experiments to test his system. The clarity with which he approached the perception of proportion provides a suitable ground for testing the plastic number by scientific means. To take the first step in that direction, it is useful to consider Van der Laan’s approach within the context of sensory psychophysics and Gestalt psychology. Highlighting these connections suggests specific directions for future research of the plastic number and opens a new chapter in studies on proportion in architecture.
Gibbs College of Architecture is proud to recognize Petya Stefanoff, who is pursuing her doctorate in the Planning, Design & Construction (PDC) program, has been appointed the new role of Director of Community Development for the City of Shawnee, Oklahoma. She joined the city in 2024.
Gibbs College of Architecture is pleased to announce that Amber N. Wiley, Ph.D., associate professor in the Division of Planning, Landscape Architecture and Design and director of the Institute for Quality Communities, has received national recognition for her book Model Schools in the Model City. The book has been named a finalist for the 2026 the PROSE Awards.
Gibbs College of Architecture Regional + City Planning Professor of Practice Vanessa Morrison and Associate Professor of Architecture Deborah Richards’ Open Design Collective received top honors at the inaugural BlackSpace Urbanist Collective Studio KIN Pitch Night Competition, held last month in Brooklyn, New York City.
