Physiognomy Glossary

Somatotypes

Somatotypes are a body-type classification system developed by American psychologist William Sheldon in the 1940s. Sheldon proposed three fundamental body types — ectomorph, mesomorph, and endomorph — and associated each with distinct personality characteristics in a system he called somatotonia, cerebrotonia, and viscerotonia respectively.

The Three Types

The ectomorph body type is characterized by a lean, slender, angular frame. Sheldon associated it with cerebrotonia: intellectual, reserved, private character. The mesomorph body type features athletic, muscular structure. Sheldon associated it with somatotonia: active, assertive, competitive character. The endomorph body type shows a rounder, more full build. Sheldon associated it with viscerotonia: sociable, comfort-loving, warmhearted character.

Relationship to Physiognomy

Somatotype theory is related to physiognomy in that it attempts to read character from physical form — extending the physiognomic principle from the face to the entire body. Like facial physiognomy, Sheldon's system was criticized on scientific grounds and associated with misuse in eugenic contexts. Also like physiognomy, it retains practical interest as an interpretive framework.

Related Terms

Frequently Asked Questions

What are somatotypes?

Somatotypes are a body-type classification system developed by William Sheldon in the 1940s. The three types — ectomorph (lean), mesomorph (muscular), and endomorph (rounded) — were each associated with distinct personality characteristics.

How do somatotypes relate to physiognomy?

Both somatotypes and physiognomy are systems that read character from physical form. Physiognomy focuses on the face; somatotype theory extends the principle to the whole body. Both are interpretive frameworks rather than empirical sciences.

Marcus Cyrus
Founder of Attainment. Drawing on primary sources from the classical physiognomy tradition (Aristotle, Lavater, della Porta) and contemporary face perception research (Todorov, Zebrowitz).

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