Cognitive complexity of software systems is a product of the functional complexity and the structural complexity measured in the unit of function-object [FO]. Details may be found in the book: Software Engineering Foundations: A Software Science Perspective [Wang, 2007].
Cognitive complexity is oriented to programmers in software engineering; while computational complexities are oriented to machine time/space consumptions in computing. Are the latter sufficient enough for dealing with large-scale software complexity in software engineering?
@Peter
There are over 10 million entries on "Cognitive Complexity of Software" via Google search following my lab’s initial work since 2005/2007. It seems your ideas stuck at those of 20 years ago ignoring the latest developments.
One of the latest findings on the nature of software is that software (SW) is a Cartesian product of Functional Models (FM) and Structure Models (SM) [Wang, 2007]. i.e., SW = FM x SM. That's why the unit of cognitive complexity is F*O. It reveals an emerging approach to treat any software system based on a general mathematical model rather than perceive them as individual applications.
BTW, your “no, no …” attitude towards academic discussions is so interesting in psychological and cognitive research.
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