The Double Test

Requires fuller treatment — the concept currently rests on a single founding source.

Definition

The double test is Wharton and Codman's founding criterion of good design (1898), stated in two limbs. First limb (reason for being): "A building, for whatever purpose erected, must be built in strict accordance with the requirements of that purpose; in other words, it must have a reason for being as it is and must be as it is for that reason" — the functional-determination thesis, applied down to the room. Second limb (harmonize with structure): "Its decoration must harmonize with the structural limitations (which is by no means the same thing as saying that all decoration must be structural)" — harmony with structure, explicitly qualified against literal structuralism. The test's verdict on modern practice is negative: "Many of the most popular features in modern house-planning and decoration will not be found to stand this double test." Its positive correlate is the plan-and-decoration compulsion: "A house, or room, must be planned as it is because it could not, in reason, be otherwise; must be decorated as it is because no other decoration would harmonize as well with the plan." Features that fail the test are not merely ugly but historically explicable — survivals of earlier social conditions, or revivals by the archaeologizing-spirit — and therefore replaceable: "since the beauty of all such features depends on their appropriateness, they may in every case be replaced by a more suitable form of treatment without loss to the general effect of house or room."

Key Thinkers

• Edith Wharton & Ogden Codman Jr — the test's authors (1898/2006): the double test as the chapter's engine, converting taste into a two-limb criterion (reason for being; harmonize with structure) and diagnosing modern house-planning as largely failing it.

Related Concepts

• rhythm-and-logic — the positive standard the test instantiates: logic (the reason-for-being limb) and rhythm (the harmony yield)
• survivals — the first diagnosis of failure: features "preserved in obedience to that instinct that makes people cling to so many customs the meaning of which is lost"
• archaeologizing-spirit — the second diagnosis of failure: features revived because "a thing must be beautiful because it is old and appropriate because it is beautiful"
• proportion — the deeper criterion: "Structure conditions ornament, not ornament structure"
• suitability — the appropriateness-test's advice-literature cousin (Eastlake's use-razor, de Wolfe's fitness): the double test is its architectural formulation
• ornament-vs-purity — the debate the test re-frames: ornament is judged neither morally nor economically but by its double standing

Source Support

Sources in the wiki that discuss this concept:

• The Historical Tradition (Wharton & Codman 1898/2006) — the test's founding statement (p. 387); the failure-diagnosis and the replaceability corollary (pp. 387–388); the qualification against literal structuralism ("which is by no means the same thing as saying that all decoration must be structural," p. 387).

Open Questions

• The second limb's parenthetical — "by no means the same thing as saying that all decoration must be structural" — is the test's own warning against the structuralist misreading. Does the test therefore anticipate modernism's functionalism (form follows function) while refusing its severity, and where exactly does the refusal fall: in the allowance of non-structural decoration that nevertheless harmonizes?
• "As will be shown further on" (p. 387) promises the test's case-by-case application in the elided pages of the chapter — which features did the full text actually put to the test, and would its verdicts survive?
• Is the double test a criterion for judging existing features (the diagnosis of survivals) or a generative rule for design (the compulsion of plan by reason)? The chapter uses it both ways — can a critical test and a design program be the same thing?