These are the files for the special issue of Synthese on Interactivism. They are in the order in which I suggest that they appear.
Interactivism: Introduction to the Special Issue
Bickhard
A Process Based Model for an Interactive Ontology
Campbell
Forms of Emergent Interaction in General Process Theory
Seibt
Interaction and Bio-Cognitive Order
Diagram
Hooker
The Interactivist Model
Bickhard
