Material Semiotics and the Communication of Cultural Identity Through Nigerian Consumer Product Design

Consumer products function not merely as functional artefacts but as material signs through which cultural identity is communicated, negotiated, and contested in everyday social life. This doctoral study develops a Material Semiotics framework for the analysis of cultural identity communication through Nigerian consumer product design, contributing an original theoretical model to the intersection of design semiotics, material culture studies, and African cultural identity scholarship. The research employs a mixed interpretive methodology combining semiotic analysis of two hundred and forty purposively selected Nigerian consumer products across eight product categories, reception analysis involving interpretive interviews with three hundred and sixty consumers across six geopolitical zones, and comparative historical analysis of shifts in product aesthetic codes over three decades of Nigerian consumer culture. Drawing on Barthesian semiotics, Peircean sign theory, and Munn's theory of value transformation, the study develops a five-level Material Semiotic Model distinguishing iconic, indexical, symbolic, ideological, and cosmological dimensions of cultural meaning in designed consumer objects. The model is applied in detailed semiotic readings of products across domestic, ceremonial, and self-presentation categories, revealing systematic patterns in how cultural identity meanings are encoded by designers and decoded by consumers across regional, generational, and class contexts. The study identifies an emerging Nigerian Design Aesthetic Vernacular characterising a new generation of identity-conscious product designs. Theoretical contributions advance design semiotics, material culture theory, and the emerging field of African design studies. Keywords: material semiotics, cultural identity, Nigerian product design, consumer culture, design theory.