Abstract

The eigenforms of von Foerster, like the concept of invariants in ecological psychology, have proved useful in stimulating both theory and empirical work in the study of perceptually guided action. The target article offers a novel elaboration of the core idea of invariance in flux. I offer two brief sketches that suggest how the novel formalism might provide a useful stimulus to thought in specific domains: the use of names in dyadic conversation and Buddhist accounts of perception.