Overview

Dedre Gentner is a cognitive scientist at Northwestern University and one of the world's leading researchers on analogical reasoning — the cognitive process of understanding something new by mapping it onto something familiar from a different domain.

Her Structure-Mapping Theory (1983) is the most influential formal account of how analogy works in human cognition and has been extensively validated experimentally.

What Is Analogical Reasoning?

Analogical reasoning is the ability to perceive structural similarity between two domains that may look completely different on the surface.

Example: understanding the atom by analogy to the solar system.

• Surface features: completely different (atoms vs. planets, electrons vs. celestial bodies)
• Structural relations: similar (a central massive object with smaller objects orbiting it)

The key insight of Gentner's research: good analogical reasoning is not driven by surface similarity (things that look alike) but by structural similarity (things that relate to other things in the same way).

Structure-Mapping Theory

Gentner's framework describes analogy as a mapping process between two mental representations:

• Base (source) domain: The domain you already understand well
• Target domain: The new domain you're trying to understand

The mapping preserves relational structure, not object attributes:

• The sun and the nucleus are mapped to each other not because they look alike but because they both play the role of "central massive object" in their respective systems.
• The relationship "orbits" is mapped from the solar system to the atom — electrons orbit the nucleus the way planets orbit the sun.

The principles of structure mapping:

1. Relational focus: Map relations between objects, not properties of objects.