Books by Astrid Schröder
Stadie,N., & Schröder, A. (2009). Kognitiv orientierte Sprachtherapie. Methoden, Material und Evaluation für Aphasie, Dyslexie und Dysgraphie. München: Elsevier Urban & Fischer.
Papers by Astrid Schröder
The presence or absence of generalization after treatment can provide important insights into the... more 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.
Die vorliegende Studie beschreibt eine Überprüfung der Wirksamkeit des semantischen Wiederholungs... more Die vorliegende Studie beschreibt eine Überprüfung der Wirksamkeit des semantischen Wiederholungsprimings zur Behandlung des mündlichen Bildbenennens bei Aphasie . Teilnehmer der Pilotstudie war ein deutschsprachiger Patient mit erhaltenen semantischen Fähigkeiten und einer post-semantisch bedingten Störung des mündlichen Bildbenennens. In insgesamt sieben Behandlungseinheiten wurden zehn Vertreter der Kategorien OBST und MUSIKINSTRUMENTE mit Aufgaben zum Benennen, Wort-Bild-Zuordnen und Nachsprechen der Zielwörter intensiv geübt. Nach der Behandlung zeigten sich nachhaltige Übungseffekte sowie Generalisierungen auf das Benennen von semantisch relatierten, ungeübten Wörtern. Die Ergebnisse zeigen, dass das semantische Wiederholungspriming eine effektive Therapiemethode zur Behandlung von postsemantisch bedingten Störungen des Bildbenennens darstellt. Erhaltene semantische Fähigkeiten können dabei als Ressource genutzt werden, um die mündliche Wortproduktion zu unterstützen, nachhaltige Übungseffekte zu erzielen und Generalisierungen auf semantisch ähnliche, ungeübte Wörter zu ermöglichen.
Diagnostik und Therapie von syntaktischen Störungen bei Aphasie.
German norms for semantic typicality, age of acquisition, and concept familiarity
The present study introduces the first substantial German database with norms for semantic typica... more The present study introduces the first substantial German database with norms for semantic typicality, age of acquisition, and concept familiarity for 824 exemplars of 11 semantic categories, including four natural (animals, birds, fruits, and vegetables) and five man-made (clothing, furniture, vehicles, tools, and musical instruments) categories, as well as professions and sports . Each category exemplar in the database was collected empirically in an exemplar generation study. For each category exemplar, norms for semantic typicality, estimated age of acquisition, and concept familiarity were gathered in three different rating studies. Reliability data and additional analyses on effects of semantic category and intercorrelations between age of acquisition, semantic typicality, concept familiarity, word length, and word frequency are provided. Overall, the data show high inter- and intrastudy reliabilities, providing a new resource tool for designing experiments with German word materials. The full database is available in the supplementary material of this file and also at www.psychonomic.org/archive.
Unambiguous generalization effects after treatment of non-canonical sentence production in German agrammatism. Brain and Language, 114, 211-229.
Agrammatism is—among others, characterized by a deficit in producing grammatical structures. Of s... more Agrammatism is—among others, characterized by a deficit in producing grammatical structures. Of specific difficulty is the utilization of complex, non-canonical sentence structures (e.g. object-questions, passives, object-clefts). Several studies have documented positive effects when applying a specific treatment protocol in terms of increasingly correct production of target complex sentence structures with some variance in generalization patterns noted across individuals.
The objective of this intervention study was to evaluate an intervention program focussing on the production of non-canonical sentences. Hypotheses about the occurrence of treatment effects were formulated on the basis of syntactic complexity, referring to the amount of syntactic phrase structures necessary to generate specific German sentence structures. A multiple single case study with seven agrammatic participants was applied, each participant receiving training in the production of object-relative-clauses and who-questions.
The investigation was designed to unambiguously evaluate for each individual, structure specific and generalized learning effects with respect to the production of object-relative-clauses, who-questions and passive sentences. Results showed significant improvements for all sentences types. This outcome is considered within methodological issues of treatment studies. Theoretical and clinical implications are discussed.
An investigation of a relative impairment in naming non-living items: theoretical and methodological implications
This paper presents a study of PH, a woman with aphasia, who shows a robust impairment in naming ... more This paper presents a study of PH, a woman with aphasia, who shows a robust impairment in naming pictures of non-living relative to living things. Un-timed investigations of feature knowledge show similar performance across categories suggesting that, as in previous studies, the category effect may be arising at a post-semantic level. However, her performance on a timed feature verification task was slower for non-living than living things (relative to matched controls), in line with her naming. This suggests that the source of PH’s category deficit is in fact semantic and that thorough investigation is necessary before claiming a post-semantic category specific deficit in word production. Finally, the results of an intervention study, which apparently eliminated the effect of semantic category on PH’s naming, are reported.
Does training-induced improvement of noncanonical sentence production in agrammatic aphasia generelize to comprehension? A multiple single case study.
Messungen des Erwerbsalters für konkrete Nomina
Neurolinguistik, Jan 1, 2003
Page 1. Messungen des Erwerbsalters für konkrete Nomina Astrid Schröder*, Christina Kauschke** &a... more Page 1. Messungen des Erwerbsalters für konkrete Nomina Astrid Schröder*, Christina Kauschke** & Ria De Bleser* *Universität Potsdam, Institut für Linguistik **Freie Universität Berlin, Institut für Deutsche und Niederländische Philologie ...
Semantische Kategorien und Merkmalswissen: Eine experimentelle Studie zur semantischen Repräsentation konkreter Objektbegriffe
The study investigates the assumption of a differential weighting of distinctive encyclopaedic, f... more The study investigates the assumption of a differential weighting of distinctive encyclopaedic, functional and sensory semantic attributes within the concept representations of living and nonliving objects. A speeded feature verification task was conducted. In order to control the stimuli for various aspects, German norms were collected of estimated age of acquistion for 244 stimuli of the Snodgrass and Vanderwart (1980) pictures. In addition, a feature listing study was carried out for 80 concrete living and nonliving concepts. Two reaction time experiments were conducted with different duration times of the presented object name. In Experiment 1 (long duration time), the object name was presented for 1000 ms, whereas in Experiment 2 (short duration time), the object name was presented for 250 ms before the semantic feature appeared. With long duration time, distinctive functional features of nonliving objects were verified faster than distinctive encyclopaedic features. This effect was replicated in Experiment 2 after short presentation of the object names. In addition, in Experiment 2, shorter reaction times were observed for functional features than for sensory features of nonliving objects. For living objects, no differences were observed in verifying the different feature types neither in Experiment 1 nor in Experiment 2. The results are discussed within the framework of different models of semantic memory. The results suggest that within the category of living objects, distinctive encyclopaedic, functional and sensory features are highly intercorrelated. For nonliving objects, it is assumed that distinctive sensory and functional but not encyclopaedic features are highly intercorrelated. In addition, distinctive functional features of nonliving objects seem to be weighted more strongly than distinctive sensory features within the object representations of nonliving objects.
KOMPLEXE SÄTZE. Störungen der Satzproduktion: Materialien für Diagnostik, Therapie und Evaluation.
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Books by Astrid Schröder
Papers by Astrid Schröder
The objective of this intervention study was to evaluate an intervention program focussing on the production of non-canonical sentences. Hypotheses about the occurrence of treatment effects were formulated on the basis of syntactic complexity, referring to the amount of syntactic phrase structures necessary to generate specific German sentence structures. A multiple single case study with seven agrammatic participants was applied, each participant receiving training in the production of object-relative-clauses and who-questions.
The investigation was designed to unambiguously evaluate for each individual, structure specific and generalized learning effects with respect to the production of object-relative-clauses, who-questions and passive sentences. Results showed significant improvements for all sentences types. This outcome is considered within methodological issues of treatment studies. Theoretical and clinical implications are discussed.