The Neural Basis and Evolution of Divergent and Convergent Thought

TL;DR

This paper presents a neural theory distinguishing convergent and divergent thought, emphasizing their neural mechanisms and evolutionary aspects, with implications for education and creativity.

Contribution

It introduces a neural-level framework characterizing convergent and divergent thinking based on associative memory architecture, highlighting their roles in creativity and problem-solving.

Findings

Convergent thought involves activating typical neural assemblies for focused reasoning.

Divergent thought involves activating atypical assemblies for exploring unconventional associations.

The ability to switch between these modes may have evolved to enhance creative problem-solving.

Abstract

This chapter takes as its departure point a neural level theory of insight that arose from studies of the sparse, distributed, content-addressable architecture of associative memory. It is argued that convergent thought is most fruitfully characterized in terms of, not the generation of a single correct solution (as it is conventionally construed), but using concepts in their most compact form by activating neural cell assemblies that respond to their most typical properties. This allows them to be deployed in a conventional manner such that effort is reserved for exploring causal relationships. Conversely, it is argued that divergent thought is most fruitfully characterized in terms of, not the generation of multiple solutions (as it is conventionally construed), but using concepts in a form that is, albeit expanded, constrained by the situation, by activating neural cell assemblies that respond to context-specific atypical properties. This allows them to be deployed in a manner that is conducive to exploring unconventional yet potentially relevant associations, and unearthing potentially useful relationships of correlation. Thus, divergent thought can involve as few as one idea. This proposal is compatible with widespread beliefs that (1) most creative tasks require not many solutions but one, yet entail both divergent and convergent thinking, and (2) not all problems with multiple solutions require creative thinking, and conversely, some problems with single solution do require creative thought. The chapter discusses how the ability to shift between convergent and divergent modes of thought may have evolved, and it concludes with educational and vocational implications.