Hostname: page-component-89b8bd64d-r6c6k Total loading time: 0 Render date: 2026-05-08T04:21:08.508Z Has data issue: false hasContentIssue false

Specificity of basic information processing and inhibitory control in attention deficit hyperactivity disorder

Published online by Cambridge University Press:  08 April 2013

G. A. Salum*
Affiliation:
National Institute of Developmental Psychiatry for Children and Adolescents – CNPq, São Paulo, Brazil Federal University of Rio Grande do Sul, Porto Alegre, Brazil
J. Sergeant
Affiliation:
Vrije Universiteit, Amsterdam, The Netherlands
E. Sonuga-Barke
Affiliation:
University of Southampton, UK Ghent University, Belgium
J. Vandekerckhove
Affiliation:
University of California, USA
A. Gadelha
Affiliation:
National Institute of Developmental Psychiatry for Children and Adolescents – CNPq, São Paulo, Brazil Federal University of São Paulo, Brazil
P. M. Pan
Affiliation:
National Institute of Developmental Psychiatry for Children and Adolescents – CNPq, São Paulo, Brazil Federal University of São Paulo, Brazil
T. S. Moriyama
Affiliation:
National Institute of Developmental Psychiatry for Children and Adolescents – CNPq, São Paulo, Brazil Federal University of São Paulo, Brazil University of São Paulo, Brazil
A. S. Graeff-Martins
Affiliation:
National Institute of Developmental Psychiatry for Children and Adolescents – CNPq, São Paulo, Brazil University of São Paulo, Brazil
P. Gomes de Alvarenga
Affiliation:
National Institute of Developmental Psychiatry for Children and Adolescents – CNPq, São Paulo, Brazil University of São Paulo, Brazil
M. C. do Rosário
Affiliation:
National Institute of Developmental Psychiatry for Children and Adolescents – CNPq, São Paulo, Brazil Federal University of São Paulo, Brazil
G. G. Manfro
Affiliation:
National Institute of Developmental Psychiatry for Children and Adolescents – CNPq, São Paulo, Brazil Federal University of Rio Grande do Sul, Porto Alegre, Brazil
G. Polanczyk
Affiliation:
National Institute of Developmental Psychiatry for Children and Adolescents – CNPq, São Paulo, Brazil University of São Paulo, Brazil
L. A. P. Rohde
Affiliation:
National Institute of Developmental Psychiatry for Children and Adolescents – CNPq, São Paulo, Brazil Federal University of Rio Grande do Sul, Porto Alegre, Brazil University of São Paulo, Brazil
*
* Address for correspondence: G. A. Salum, M.D. Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, room 2202, 90035-003 Porto Alegre, RS, Brazil. (Email:gsalumjr@gmail.com)

Abstract

Background

Both inhibitory-based executive functioning (IB-EF) and basic information processing (BIP) deficits are found in clinic-referred attention deficit hyperactivity disorder (ADHD) samples. However, it remains to be determined whether: (1) such deficits occur in non-referred samples of ADHD; (2) they are specific to ADHD; (3) the co-morbidity between ADHD and oppositional defiant disorder/conduct disorder (ODD/CD) has additive or interactive effects; and (4) IB-EF deficits are primary in ADHD or are due to BIP deficits.

Method

We assessed 704 subjects (age 6–12 years) from a non-referred sample using the Development and Well-Being Assessment (DAWBA) and classified them into five groups: typical developing controls (TDC; n = 378), Fear disorders (n = 90), Distress disorders (n = 57), ADHD (n = 100), ODD/CD (n = 40) and ADHD+ODD/CD (n = 39). We evaluated neurocognitive performance with a Two-Choice Reaction Time Task (2C-RT), a Conflict Control Task (CCT) and a Go/No-Go (GNG) task. We used a diffusion model (DM) to decompose BIP into processing efficiency, speed–accuracy trade-off and encoding/motor function along with variability parameters.

Results

Poorer processing efficiency was found to be specific to ADHD. Faster encoding/motor function differentiated ADHD from TDC and from fear/distress whereas a more cautious (not impulsive) response style differentiated ADHD from both TDC and ODD/CD. The co-morbidity between ADHD and ODD/CD reflected only additive effects. All ADHD-related IB-EF classical effects were fully moderated by deficits in BIP.

Conclusions

Our findings challenge the IB-EF hypothesis for ADHD and underscore the importance of processing efficiency as the key specific mechanism for ADHD pathophysiology.

Information

Type
Original Articles
Copyright
Copyright © Cambridge University Press 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

Supplementary material: File

Salum Supplementary Material

Salum Supplementary Material

Download Salum Supplementary Material(File)
File 67.1 KB