title: Reaction time variability associated with reading skills in poor readers with ADHD.
abstract: Linkages between neuropsychological functioning (i.e., response inhibition, processing speed, reaction time variability) and word reading have been documented among children with attention-deficit/hyperactivity disorder (ADHD) and children with Reading Disorders. However, associations between neuropsychological functioning and other aspects of reading (i.e., fluency, comprehension) have not been well-documented among children with comorbid ADHD and Reading Disorder. Children with ADHD and poor word reading (i.e., ≤25th percentile) completed a stop signal task (SST) and tests of word reading, reading fluency, and reading comprehension. Multivariate multiple regression was conducted predicting the reading skills from SST variables [i.e., mean reaction time (MRT), reaction time standard deviation (SDRT), and stop signal reaction time (SSRT)]. SDRT predicted word reading, reading fluency, and reading comprehension. MRT and SSRT were not associated with any reading skill. After including word reading in models predicting reading fluency and reading comprehension, the effects of SDRT were minimized. Reaction time variability (i.e., SDRT) reflects impairments in information processing and failure to maintain executive control. The pattern of results from this study suggest SDRT exerts its effects on reading fluency and reading comprehension through its effect on word reading (i.e., decoding) and that this relation may be related to observed deficits in higher-level elements of reading.
authors: Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.
authors: Leanne
authors: L
authors: Tamm
authors: Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.
authors: Jeffery N
authors: JN
authors: Epstein
authors: Pediatrics, University of Texas Health Science Center Houston, Houston, Texas.
authors: Carolyn A
authors: CA
authors: Denton
authors: Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.
authors: Aaron J
authors: AJ
authors: Vaughn
authors: Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.
authors: James
authors: J
authors: Peugh
authors: Psychology and Neuroscience, University of Colorado at Boulder, Boulder, Colorado.
authors: Erik G
authors: EG
authors: Willcutt
mesh_terms: D000124:Achievement; D001289:Attention Deficit Disorder with Hyperactivity / Q000150:complications*; D002648:Child; D032882:Comprehension; D004410:Dyslexia / Q000175:diagnosis / Q000209:etiology*; D005260:Female; D006801:Humans; D007266:Inhibition, Psychological; D007361:Intelligence Tests; D008297:Male; D011237:Predictive Value of Tests; D011569:Psychiatric Status Rating Scales; D011930:Reaction Time / Q000502:physiology*; D011932:Reading