The Theory / Theory evolution
This section presents changes in the Spectrum theory since its inception in 1966.
First, which key features have remained unchanged?
1. Muska's discovery that a single governing principle underlies every teaching-learning event remains unchanged. That principle, the axiom of the Spectrum, is: Teaching is a chain of decision making.
2. Additionally, The Anatomy of Any Style continues to provide the framework for the conceivable categories of decisions that must be made in any teaching-learning transaction. The specific configuration of the decisions in each set determines the teaching-learning approach. Every T-L approach has its individual decision pattern in the Anatomy.
Second, which features in the Spectrum have changed?
Changes were made when the actions in the classroom did not fully correspond with the theory. While some discrepancies (theoretical gaps) required only minor adjustments, other discrepancies required years of investigation to find the missing link between the theoretical intent and classroom practice.
The various topics highlight some of the changes, additions, or refinements to the theory.