title: Underlying cause(s) of letter perseveration errors.
abstract: Perseverations, the inappropriate intrusion of elements from a previous response into a current response, are commonly observed in individuals with acquired deficits. This study specifically investigates the contribution of failure-to activate and failure-to-inhibit deficit(s) in the generation of letter perseveration errors in acquired dysgraphia. We provide evidence from the performance 12 dysgraphic individuals indicating that a failure to activate graphemes for a target word gives rise to letter perseveration errors. In addition, we also provide evidence that, in some individuals, a failure-to-inhibit deficit may also contribute to the production of perseveration errors.
authors.affiliation: Beckman Institute, University of Illinois, Urbana-Champaign, Urbana, IL 61801, United States. fischerb@illinois.edu
authors.forename: Simon
authors.initials: S
authors.lastname: Fischer-Baum
authors.forename: Brenda
authors.initials: B
authors.lastname: Rapp
mesh_terms: D000368:Aged; D000381:Agraphia / Q000503:physiopathology*; D005260:Female; D006801:Humans; D007266:Inhibition, Psychological; D007802:Language; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D011578:Psycholinguistics / Q000379:methods*; D014956:Writing