 In "Some Linguistic Structures in the Speech of a Broca's Aphasic" (1972) Gleason, Goodglass, Bernholtz, and Hyde discuss an experiment carried out with a man who, after a stroke, had been left with Broca's aphasia/agrammatism,
a specific form of aphasia typically impairing the production of morphology and syntax more than it impairs comprehension.This experiment employed the Story Completion Test (often used to probe a subject's capacity for producing various common grammatical forms)
as well as free conversation and repetition to elicit speech from the subject;
this speech was then analyzed to evaluate how well he used inflectional morphology
(e.g.plural and past tense word endings) and basic syntax (the formation of, for example, simple declarative, imperative, and interrogative sentences).