Processing Speed Weakness in Children and Adolescents with Non-hyperactive but Inattentive ADHD (ADD)
Overview
Pediatrics
Psychology
Affiliations
DSM-IV-TR defines ADHD-Predominantly Inattentive as allowing up to five symptoms of hyperactivity/impulsivity, while theories of the inattentive type usually assume a group that is hypoactive and characterized by processing speed and cognitive interference deficits. In a community-recruited sample of 572 children and adolescents, a pure inattentive subtype of ADHD (ADD) was defined as those who met DSM-IV-TR criteria for ADHD-PI but had two or fewer hyperactive/impulsive symptoms. Processing and output speeds of those with ADD were compared to those identified with DSM-IV-TR ADHD combined type and non-ADHD controls. These results were then contrasted with those found when DSM-IV-TR defined ADHD-PI was compared with ADHD-C and controls. Processing and output speed were assessed with the Trailmaking A and B and the Stroop Naming Tests. Cognitive interference control was assessed with the interference score from the Stroop Task. Slower cognitive interference speed was found in the ADD vs. ADHD-C and controls comparisons, but not the ADHD-PI versus ADHD-C and controls comparisons. On output speed measures, ADD exhibited the slowest performance, significantly different from controls and the effect size for the set-shifting speed contrast (Trailmaking B) was double that of the ADHD-PI vs. control comparison. ADHD-Inattentive type as defined by the DSM-IV-TR is a heterogeneous condition with a meaningful proportion of those affected exhibiting virtually no hyperactive/impulsive symptoms. This subgroup may represent a distinct inattentive condition characterized by poor cognitive interference control and slow processing or output speed.
Parks K, Oram Cardy J, Joanisse M JCPP Adv. 2024; 4(2):e12218.
PMID: 38827980 PMC: 11143959. DOI: 10.1002/jcv2.12218.
Rhythmic Attention and ADHD: A Narrative and Systematic Review.
Haigh A, Buckby B Appl Psychophysiol Biofeedback. 2024; 49(2):185-204.
PMID: 38198019 DOI: 10.1007/s10484-023-09618-x.
Developmental Correlates of Accelerated Molar Eruption in Early Childhood.
McDermott C, Lee J, Park A, Tooley U, Boroshok A, Hilton K Biol Psychiatry Glob Open Sci. 2023; 3(4):847-854.
PMID: 37881542 PMC: 10593886. DOI: 10.1016/j.bpsgos.2023.02.006.
Forchelli G, Vuijk P, Colvin M, Ward A, Koven M, Dews A Child Neuropsychol. 2021; 28(2):266-286.
PMID: 34544318 PMC: 9284538. DOI: 10.1080/09297049.2021.1972957.
Basic and complex cognitive functions in Adult ADHD.
Mohamed S, Butzbach M, Fuermaier A, Weisbrod M, Aschenbrenner S, Tucha L PLoS One. 2021; 16(9):e0256228.
PMID: 34473722 PMC: 8412315. DOI: 10.1371/journal.pone.0256228.