Somatotypology (Sheldon)

Somatotypology was developed by American psychologist William Herbert Sheldon in the 1940s.

The research method. By studying thousands of college student photographs, he identified three extreme body constitution types and mapped them to three temperaments.

An ambiguous reputation. Sheldon's work sparked fierce debate: it was used both for constructive applied programs and for pseudoscientific racial justifications — which long defined the system's ambiguous reputation.

The Three Somatotypes

• Ectomorph — slender, elongated body with minimal fat and muscle → cerebrotonia (introversion, reserve, inclination toward mental activity)
• Mesomorph — athletic, muscular body → somatotonia (activity, dominance, risk-taking)
• Endomorph — rounded, soft body with a tendency to accumulate fat → viscerotonia (sociability, relaxation, pleasure-seeking)

Three numbers — a real person. A real person is described by a three-digit number (for example, 1-7-2), reflecting the degree of expression of each component. There are no pure types.

The Modern Scientific View

No rigid connection. Modern science acknowledges that no rigid direct connection exists between body type and temperament: genetics, lifestyle, and nutrition can substantially alter constitution, and personality is shaped by a multitude of factors.

Yet the idea persists. Nevertheless, the idea that biological constitution predisposes certain tendencies continues in applied medicine (especially sports science) and in integrative medicine under other names.

Place in Errarium

Group of somatic methods. In the Errarium atlas, somatotypology occupies a place among somatic methods alongside palmistry (#7) and physiognomy (#14).

Quasi-scientific biology. Its fundamental distinction lies in the attempt to create a quasi-scientific biological basis for typology, which brings it closer to Big Five (#3) in its claim to objectivity while strikingly differing in methodology: there — questionnaire statistics; here — visual body classification.