Background: Verb retrieval and sentence production difficulties are both common features of aphasia. Previous treatment studies have focused predominantly on verb retrieval and the mapping of semantic and syntactic structure. There have been more limited investigations of the production of the predicate argument structure (PAS). Aims: This study aimed to evaluate the outcome of intensive therapy for a client with aphasia. NS had multiple and interacting difficulties that resulted in problems in producing sentences. Therapy aimed to improve his sentence production by: (a) improving the retrieval of verbs, (b) increasing his awareness of the relationship between nouns and verbs, and (c) improving his production of one-, two-, and three-argument structures. The therapy thus targeted access to PAS information and PAS production as well as verb retrieval. Methods & Procedures:A period of intensive therapy, based around a set of 48 self-selected verbs, was preceded and followed by detailed assessment of NS's single word and sentence production and comprehension. Outcomes & Results: Therapy resulted in a significant improvement in NS's retrieval of the verbs involved in treatment but no generalisation to other verbs. His production of sentences showed more widespread changes. He produced more nouns within sentences, omitted fewer obligatory arguments, and produced a greater variety of argument structures in connected speech. Conclusions: Therapy resulted in a greater awareness of the need for a verb within a sentence and a strategy for producing the argument structure frame around that verb. Improved sentence production was therefore seen, although verb retrieval difficulties were still evident. The study replicates previous research that verb and sentence production difficulties can be treated effectively in people with aphasia. The effects of therapy on sentence production in constrained tasks and narrative speech are discussed.

Background: In recent years there has been significant interest in the differential processing of nouns and verbs in people with aphasia, but more limited consideration about whether the differences have implications for therapy. It remains unclear whether verbs can be treated in a similar way to nouns or should be treated using approaches that recognize the relationship between verb retrieval and sentence production. Aims: This paper reviews studies focusing on therapy for spoken verb retrieval, considering the impact of therapy on treated and untreated verbs, sentence production and connected speech. It explores whether there are differential gains across therapy paradigms and whether verbs respond to therapy in the same way as nouns. Method & Procedures: Studies were identified using a systematic search. A total of 26 studies were reviewed and classified under four headings: (1) studies that treated verbs in a single‐word context, (2) studies that compared treatment for nouns and verbs, (3) studies that treated verbs in a sentence context, and (4) studies that treated verb retrieval and argument structure. Main Contribution: Findings from the review demonstrate that verb therapy, irrespective of whether verbs are treated within a single‐word or sentence context, is effective in improving the retrieval of treated verbs, but with limited generalization to untreated verbs. Verbs respond very similarly to nouns when treated using the same techniques, but improving verb retrieval may be harder to achieve than improving noun retrieval. The impact on sentence production is more varied. The gains in sentence production are discussed in relation to the different therapy types, the rationale for therapy and the presence of co‐occurring sentence difficulties. Conclusions: The review highlights the need for more systematic evaluation of different types of verb therapy, measuring the impact of therapy on verb retrieval, sentence production and connected speech. Only through the judicious assessment and monitoring of change across different contexts will an understanding of how verbs respond to therapy be developed and what generalization patterns can be predicted. This will lead to increased confidence in the selection of therapy approaches for people with verb difficulties in aphasia.

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