Effektorformen

Effektorformen, or effector forms, is a term used in linguistic typology to describe a class of verbal or clausal forms that mark the entity responsible for bringing about a change or event—the effector. This can include agents, causers, and instrumental means by which an action is accomplished. The concept is used to analyze how languages encode causation and agency beyond a simple agent–patient dichotomy, and it is often discussed in the context of valency, voice, and case marking.

Realization of effektorformen varies across languages. They can be expressed through morphological marking on the verb (agentive or causative affixes), through specialized voice systems that foreground the causer, or via applicative constructions that elevate the effector’s role within the clause. Periphrastic expressions headed by causative or instrumental verbs are another common realization. In some languages, effector marking is obligatory for certain events, while in others it is optional or restricted to particular lexical items.

The study of effektorformen can help distinguish who or what caused an action and whether the means or instrument is relevant to the event’s interpretation. They are often discussed alongside other devices for changing valency, such as causatives and applicatives, as well as the broader categories of voice and aktionsart. Because terminology and cross-linguistic practices differ, the exact definition and boundaries of effektorformen can vary between grammars and languages.

See also: agent, causer, instrumental case, causative, applicative, voice.