title: Interference control in working memory: comparing groups of children with atypical development.
abstract: The study aimed to test whether working memory deficits in children at risk of Learning Disabilities (LD) and/or attention deficit/hyperactivity disorder (ADHD) can be attributed to deficits in interference control, thereby implicating prefrontal systems. Two groups of children known for showing poor working memory (i.e., children with poor comprehension and children with ADHD) were compared to a group of children with specific reading decoding problems (i.e., having severe problems in phonological rather than working memory) and to a control group. All children were tested with a verbal working memory task. Interference control of irrelevant items was examined by a lexical decision task presented immediately after the final recall in about half the trials, selected at random. The interference control measure was therefore directly related to working memory performance. Results confirmed deficient working memory performance in poor comprehenders and children at risk of ADHD + LD. More interestingly, this working memory deficit was associated with greater activation of irrelevant information than in the control group. Poor decoders showed more efficient interference control, in contrast to poor comprehenders and ADHD + LD children. These results indicated that interfering items were still highly accessible to working memory in children who fail the working memory task. In turn, these findings strengthen and clarify the role of interference control, one of the most critical prefrontal functions, in working memory.
authors: Department of Psychology, University of Pavia, Italy. paola.palladino@unipv.it
authors: Paola
authors: P
authors: Palladino
authors: Marcella
authors: M
authors: Ferrari
mesh_terms: D001289:Attention Deficit Disorder with Hyperactivity / Q000150:complications* / Q000523:psychology; D002648:Child; D032882:Comprehension; D003657:Decision Making; D005260:Female; D006801:Humans; D007859:Learning Disabilities / Q000150:complications* / Q000523:psychology; D008297:Male; D008569:Memory Disorders / Q000150:complications* / Q000523:psychology; D008570:Memory, Short-Term; D011939:Mental Recall; D009483:Neuropsychological Tests / Q000706:statistics & numerical data; D013647:Task Performance and Analysis