C.M. Shewan’s research while affiliated with American Academy of Orthopaedic Surgeons and other places

... However, despite an increased communicative load, some researchers suggest that the flexibility involved in producing discourse may provide an advantage to people with aphasia in lexical retrieval measures of discourse relative to constrained tasks, such as confrontation naming and picture-based sentence production (e.g., Edmonds et al., 2014Edmonds et al., , 2015Faroqi-Shah, 2012;Ingles et al., 1996) because there are generally numerous ways to express a given idea, story, instruction or opinion (e.g., Armstrong, 2000;Bandur & Shewan, 2008). Due to individual differences among people with aphasia, together with specific language impairments that they demonstrate relative to their type of aphasia, some participants may benefit from this flexibility when producing discourse while others may benefit from tasks involving more constraint (e.g., Edmonds et al., 2014). ...

Reference:

Measuring treatment outcome in severe Wernicke’s aphasia