title: Training-induced improvement of noncanonical sentence production does not generalize to comprehension: evidence for modality-specific processes.
abstract: The presence or absence of generalization after treatment can provide important insights into the functional relationship between cognitive processes. The aim of the present study was to investigate the relationship between the cognitive processes that underlie sentence comprehension and production in aphasia. Using data from seven participants who took part in a case-series intervention study that focused on noncanonical sentence production [Stadie et al. (2008). Unambiguous generalization effects after treatment of noncanonical sentence production in German agrammatism. Brain and Language, 104, 211-229], we identified patterns of impairments and generalization effects for the two modalities. Results showed (a) dissociations between sentence structures and modalities before treatment, (b) an absence of cross-modal generalization from production to comprehension after treatment, and (c), a co-occurrence of spared comprehension before treatment and generalization across sentence structures within production after treatment. These findings are in line with the assumption of modality-specific, but interacting, cognitive processes in sentence comprehension and production. More specifically, this interaction is assumed to be unidirectional, allowing treatment-induced improvements in production to be supported by preserved comprehension.
authors.affiliation: a Linguistics Department , Potsdam University, Center of Excellence Cognitive Sciences , Potsdam , Germany.
authors.forename: Astrid
authors.initials: A
authors.lastname: Schröder
authors.affiliation: a Linguistics Department , Potsdam University, Center of Excellence Cognitive Sciences , Potsdam , Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Burchert
authors.affiliation: a Linguistics Department , Potsdam University, Center of Excellence Cognitive Sciences , Potsdam , Germany.
authors.forename: Nicole
authors.initials: N
authors.lastname: Stadie
mesh_terms: D000328:Adult; D000368:Aged; D001039:Aphasia, Broca / Q000503:physiopathology* / Q000534:rehabilitation*; D016022:Case-Control Studies; D032882:Comprehension / Q000502:physiology*; D005260:Female; D005858:Germany; D006801:Humans; D007802:Language; D008297:Male; D008875:Middle Aged; D013060:Speech / Q000502:physiology*
keywords: aphasia treatment; cross-modal generalization; sentence comprehension; sentence production; syntactic processing of noncanonical sentences