The model of hierarchical complexity and 'center of gravity'

Continuing this post, the MHC assumes no such chimera:

"In mapping the mathematical orders of order of hierarchical complexity and of stage transition on to real world data, there are a number of considerations. Because the model does not call for global measures (e.g., of a person’s 'center of gravity'), it is possible to look at change trial by
trial, choice by choice, task action by task action. [...] By contrast, other stage theories have no such independent variable much less one that works as well as order of hierarchical complexity" (318).