Journal of Systems Thinking · Volume 6, Issue 1 · 2026-08-07
Structured External Representations
Object-Oriented Thinking (OOT) Beyond Its Own Literature. A Systematic Literature Review
Heather Coffman
DOI 10.54120/jost.v26i1.2ootslr6 (registration pending)
Abstract
ABSTRACT: External representations are ubiquitous in knowledge work, yet the literature explaining how they support thinking remains fragmented across disciplines, representational forms, and theoretical traditions. This systematic literature review examined three observable domains of the emerging concept of Object-Oriented Thinking (OOT): verbal, visual, and tangible external representations in which mental models, information, and organization are explicitly instantiated. Literature was identified through three complementary discovery domains and subjected to abstract screening, cross-domain characterization, accessibility assessment, and systematic analysis, yielding a validated synthesis corpus of 51 publications. The synthesis identified seven interrelated themes: structured externalization of knowledge; representations as reasoning environments; iterative sensemaking and knowledge construction; human–technology complementarity in knowledge systems; shared representations and distributed knowledge work; embodied and material engagement with representations; and persistent, traceable, and reusable knowledge. Four cross-cutting principles qualified these processes: representational fit and alignment; scaffolding, facilitation, and representational competence; domain and contextual knowledge; and representational integration and coherence. Across the corpus, a consistent pattern emerged: externalization alone was not the central contribution. External representations became consequential when information and relationships were organized into structures that could be inspected, manipulated, reasoned with, revised, coordinated, and preserved. Their effects varied with representational structure, task, user, context, and integration. The evidence base was conceptually convergent but methodologically heterogeneous and unevenly distributed across disciplines and representational forms, limiting stronger causal and comparative inference. The review does not establish OOT as a validated theoretical construct. It does, however, show that the phenomena encompassed by its operational definition are supported by a substantial and interconnected literature. By integrating that literature, the review provides an evidence-based account of structured external representation and a foundation for investigating more precisely what is made explicit, how it is organized, and what value arises from making thought externally available for continued knowledge activity.
© 2026 Journal of Systems Thinking (JoST) · CC BY-NC-ND 4.0
