 Linguistic typology

Linguistic typology compares structural properties across languages using explicit criteria for grouping constructions. It can ask which patterns recur, which combinations are rare, and whether a proposed generalization survives a wider sample. The World Atlas of Language Structures exemplifies this approach by coding documented properties as comparable features.^[ref]

Consider word order. Three distinct elements have $3!=6$ possible permutations, but logical possibility alone says nothing about their distribution in languages. A published comparison must define which constructions count: the atlas's chapter on subject, object and verb order restricts its main comparison to specified transitive declarative constructions.^[ref]

For an original counting example, a sample containing six languages of one type and four of another gives proportions $0.6$ and $0.4$. Those proportions describe that sample. Sampling bias, missing observations and shared historical relationships can prevent them from estimating how common the types are more generally. An unrecorded feature must also remain distinct from an observed absence.